Choosing the best mountain bike is hard. There's loads of them out there. They all look the same. And yet different too. This guide will narrow things down.
After reading this comprehensive guide you’ll be left with a handy shortlist of the best mountain bike options out there in 2021. Not all mountain bikes are created equal. In this buyers guide we’ll go into what you get for you money at different price points. We’ll also detail the principal variations in mountain bike designs that are out there.
There is no single best mountain bike. Mountain bikes come in different designs depending on what their intention may be. A mountain bike for racing cross-country is not the same as a mountain bike intended for weekend trail riding. As such, the round-up of the best mountain bikes available in 2021 features winning bikes from different disciplines within the broad church that is mountain biking. We’ll go through the differences in disciplines further down this guide. It’s also worth looking slightly under your budget and then factoring in what are the best mountain bike upgrades you can easily and affordably add to any of the great bikes to make them even better for you and your riding.
Current best mountain bikes as tested by mbr
- Under £500: Pinnacle Kapur 2
- Under £750: Voodoo Bizango
- Under £1000: Vitus Sentier 275 VR
- Under £2000: Marin Rift Zone 1
- Under £3000: Nukeproof Reactor 290 Comp Alloy
- Over £3000: Transition Spur X01
- Best lightweight: Trek Procaliber 9.7
What’s your budget?
£400+ is a good start but… hold your horses. We’re going to go into what you get (and don’t get) for your money in a moment. You can get a perfectly decent mountain bike for under £500. You can also max out you Mastercard and drop over £5k on a mountain bike. Are those bikes 10x better? No, they aren’t. They are better, sometimes significantly so depending on the rider and terrain, but essentially you get less drastic improvements in bike quality the higher you go up the money scale.
Our current picks at all price points:
We have tested all of the following bikes. Tested them properly. This isn’t some shortlist pulled together from browsing brochures and brand websites.
Under £500 mountain bikes
What to look out for on the best mountain bikes under £500: Avoid full-suspension at all cost. Avoid supermarket bikes. They’ll be heavy and/or flexy with poor damping and there’ll be no after-sales backup or spares when they go wrong. Go for aluminium frames rather than steel/chromoly. Choose hydraulic disc brakes if possible. Aim for modern trail bike geometry more than steep, twitchy XC angles. Air-sprung suspension forks make it easier to set the bike up to your body weight. Shimano or SRAM drivetrain, preferably with a single chainring up front and wide-range cassette at the rear.
mbr testers’ pick:
- Pinnacle Kapur 2 review – A classic affordable hardtail that has a really nice feeling ride thanks to its impressively sophisticated frame. The finishing kit is perfectly fine but it’s the bike’s overall geometry and stance that marks it out as a great choice in the sub-£500 bracket.
Also worth considering:
- Vitus Nucleus VR review – build kit belies its price tag
- Voodoo Bantu review – always puts a grin on our face
Under £750 mountain bikes
What to look out for on the best mountain bikes under £750: Honestly, at this little nudge up from the £500 bikes detailed above, you’re simply looking for slightly better components. Things like better quality tyres (folding kevlar bead, decently treaded), definitely an air-sprung fork, gears with a wider range. Read our buyer’s guide for more information on choosing the best hardtail mountain bike.
mbr testers’ pick:
- Voodoo Bizango review – The alloy Bizango simple has no competition. It is imply unbeatable for the money. In fact, given the choice we’d probably opt for this bike over many decent £1000 mountain bikes (saving a couple of components upgrades for the ensuing seasons). Good brakes, good gearing, plenty of standover, decent fork. Shames many bikes at twice the price.
Also worth considering:
- Saracen Zenith Pro review – impressively lightweight
- Polygon Xtrada 6 review – a nippy little number
- Kona Mahuna review – great for shorter riders
Under £1000 mountain bikes
What to look out for on the best mountain bikes under £1000: an overall weight lower than 14kg (although it can be hard to find listed weights for bikes these days unfortunately). As with the £750 bike must-haves above, it’s more about looking for improvements in the bike’s spec overall. Perhaps to two features that may start to appear at this price point are dropper seatposts and bolt-thru axles.
mbr testers’ pick:
- Vitus Sentier 275 VR review – Vitus as a brand have quickly established themselves of something of a ubiquitous choice when it comes money-minded direct sales mountain bikes that shred hard and don’t cut corners. The Sentier is classic Vitus: light, versatile and fast with a spec choice that clearly shows a company run by genuine mountain bike enthusiasts.
Also worth considering:
- Nukeproof Scout 275 Sport review – comfy and capable
- Sonder Transmitter NX1 Recon review – great on the downhills
- Rockrider AM 100 HT review – surprisingly great bike from Decathlon
Under £2000 mountain bikes
What to look out for on the best mountain bikes under £2000: Should have all of the stuff mentioned for the £1000 bikes above, plus… A select handful of full-suspension bikes are decent options at this price point. BUT, a hardtail is going to be lighter and significantly better specced. Fat tyre hardtails (with 2.6in + tyres) should be considered and test ridden if you’re after a trail bike. Look for a single chainring drivetrain, ideally 11-speed or higher. A suspension fork with more damping adjustment and tuning potential (volume spacers etc). Dropper seatposts are nice. Hardtails will be split by riding disciplines (XC, Trail, Enduro) so choose your weapon wisely. SRAM NX or Shimano SLX drivetrain (or better). Short stem. Wide handlebars.
mbr testers’ pick:
- Marin Rift Zone 29 1 review – Like any good bike at any price point The Rift Zone is a winning choice because of good angles and attitude. This isn’t an overgunned tank that can’t deliver on its promise. Nor is it a skittish or sketchy experience it gets pressed into service on some proper terrain. The only thing lacking is a dropper seatpost so try to wangle a deal with the bike shop when purchasing, or get saving your pennies to slap a dropper in a few months’ time.
Also worth considering:
- Calibre Bossnut review – still amazing value despite price creep
- Vitus Mythique 27 VR review – progressive geometry at affordable price
- Canyon Stoic 4 review – good handling and well balanced
- Giant Stance 2 review – fast and efficient but now also loads of fun
- Marin San Quentin 2 review – progressive hardtail hooligan
Under £3000 mountain bikes
What to look out foron the best mountain bikes under £3000: Should have at least all of the stuff mentioned in the ‘£1000 to £2000’ bikes range, plus… More full-suspension options appear, especially over £2,000. Weight conscious cross-country riders are arguably still better served with a hardtail, but everyone else is probably better off on full-suspension. Carbon enters the arena here, mainly with direct-sales brands. Dropper seatpost should be present. Suspension fork and rear shock with compression damping adjustment. Full-suspension bikes will be categorised into riding disciplines (XC, Trail, Enduro) so choose accordingly. Some drivetrain parts from SRAM GX or Shimano XT (or better).
mbr testers’ pick:
- Nukeproof Reactor 290 Comp Alloy review – After a good few yeas (decades?) of arguing amongst ourselves, the MTB world has pretty much settled on what constitutes a modern trail bike: a mid-travel 29er. With 140/130mm travel the 29er Reactor ticks the basic boxes but it’s much more than that. For a first generation model the designers at Nukeproof have knocked it out of the park. It’s ready to rip staright away. If you’ve not got the leg length to handle 29in wheels, there’s the 27.5in Reactor option.
Also worth considering:
- Radon Slide Trail 9.0 review – ton of fun mail-order mountain bike
- Trek Procaliber 9.7 review – XC race hardtail stunner
- Canyon Spectral AL 6.0 review – best 27.5in wheel trail bike
- YT Jeffsy Comp 29 review – can’t avoid the value prospect
- Whyte T-140 S V1 review – short-travel ripper that Whyte do so well
What to look out for: Lucky you. Just make sure you get a bike that suits your principle riding discipline (XC, Trail or Enduro) and you’ll not go wrong with anything at this price! Regardless, look for at least all of the stuff mentioned above, plus… Carbon frames are worth considering, especially above £3,000. Tubeless set-up wheels and tyres. Complete SRAM GX or Shimano XT drivetrains or better. (Psst… surely you must also be contemplating the best electric mountain bikes at this price..?)
mbr testers’ pick:
- Transition Spur X01 review– Did someone say down-country? The Spur is so 2021 it hurts. Transition as a brand are typically leaders rather than followers and this short travel, progressive geometry little until is right at the forefront of modern MTB. The Spur is not designed for hitting chucky enduro track blind at warp speed; the Spur is all about maxing out the fun on trails that are more familiar and/or calmer. It’s not cheap but the price for being ahead the curve is well worth paying a premium.
Also worth considering:
- Canyon Torque CF 8.0 review – super fast and poised enduro machine
- Nukeproof Mega 275 Carbon Pro review – if it was okay for Sam Hill…
- Santa Cruz Hightower CC review – actually worth the premium
- Evil The Following V3 GX Eagle review– all about the wondrous Delta linkage design
- Nukeproof Giga 290 Carbon Factory review – latest jawdropper from Nukeproof
Best lightweight mountain bike
What to look out for on the best XC race bikes: This is the point where hardtails come back into the mix. No matter how light full-suspension bikes get, the equivalent hardtail will always be lighter. And not by an insignificant amount (well, in weight weenie terms anyway). Having said that, the Trek ProCaliber does have an essence of rear suspension to it: the IsoSpeed ‘decoupler’ enables the seat tube to move independently from the rest of the front triangle. Only by a few millimeters but it’s enough to calm things down and remove some skittishness under heavy torque moments.
mbr tester’s pick:
- Trek Procaliber 8.7 review – We’re nailing our colours to the mast here. If lightweight is the be all and end all of what you want – and there’s absolutely nothing wrong with that, weight weenies have always been a key part of MTB’s onward march – a hardtail is the clear choice. If you want creature comforts and burly terrain capability, you don’t get a lightweight mountain bike. If you want a stamp and go rocketship for making yourself cough up a lung at on each and every Strava climb. get a hardtail. No one makes hardtails as well as the Big Bike Brands and the current KOM/QOM crown goes to Trek with their thrilling Procaliber.
Also worth considering:
- Specialized Epic Comp Evo review – full suspension World Cup weapon
- Scott Scale 920 review – pinnacle of carbon hardtails
- Scott Spark 920 review – more than just XC machine
- Mondraker Chrono Carbon R review – no compromise rocket
What sort of riding are you going to do?
This is a very hard question to answer. But it’s vital to making the correct bike choice.
Now then, mountain bikes are capable machines. They can turn their hand to all sorts of riding. More so than ever these days in fact. You can go for a XC ride on an Enduro bike. You can do a XC race on a Trail bike. So you aren’t closing off all avenues of riding by going for a certain sort of bike. But you’ll have a more fun and rewarding experience if you get a bike that suits your main type of riding best.
Conversely, don’t be tempted to get a bike for the extreme 1% of the riding that you’ll do on it. A burly gravity-fuelled bike is fine and dandy for the annual uplift day but you’ll have to pedal that thing around for the other 51 weekends of the year.
Whilst your budget is probably going to be main thing you’re thinking about at first, it shouldn’t be. First, you need to decide on the type of mountain bike is going to suit you best. Then you can look at what your budget will get you.
Whilst it’s increasingly rare to find a bad bike these days, it is all too easy to end up with a bike that simply isn’t suited to where you ride.
For the purposes of this guide let’s ignore the extreme ends of the spectrum. Chances are you aren’t looking for an Olympic XC race bike. Nor are you looking for a World Cup level Downhill bike. This buyers guide is about ‘normal’ mountain bikes.
Even within the realm of ‘normal’ mountain bikes there are various sub-genres. Some are gimmicks, some are irrelevant, some are seemingly entirely fabricated by marketing departments.
The remit of normal mountain biking has ‘Cross-Country’ at one end of the spectrum and ‘Enduro’ at the end other end. Enduro used to be (and sometimes still is) called ‘All Mountain’ by some bike brands. In the broad middle of this spectrum is where ‘Trail’ bikes live.
In a nutshell: the best mountain bike for most people
In our opinion, if you’re in doubt, get a Trail bike. These will be capable enough on more extreme terrain but won’t feel like a burden on calmer, flatter terrain.
Choosing the best mountain bike for: Trail riding
Trail riding is arguably best defined by what it’s not. It’s not cross-country. It’s not Enduro. It’s riding around regular tracks and trail centres with the occasional 50km moorland epic thrown in and the odd uplift day or two. Trail bikes sport between 120 and 150mm of travel and are designed strong enough to withstand all sorts without ending up being portly. The geometry on Trail bikes should be able to handle all sorts of terrain. But often it doesn’t. We’re still finding Trail bikes with overly steep head angles, short reaches and slack seat angles. If you want to be Trail rider, pay extra attention to the geometry.
Recommended mountain bike: hardtail or full suspension with 120-140mm suspension.
Read the mbr review of the Nukeproof Reactor 290c Elite
Choosing the best mountain bike for: Cross-country riding
This is less about jumps and slamming berms and more about pedalling miles and crossing fells. But hold on, don’t write it off thinking it’s for doddery older riders on dull, wide fireroads. XC riding and racers are still about off-road speed. But with cross country there’s more of an emphasis on climbing. So the bikes are as light as possible. They also don’t pack much in the way of suspension travel (sub-120mm) as more suspension travel results in heavier bikes. They are also often less overbuilt in terms of fork/frame/wheel stiffness. Again, stiffer stuff means more weight. They also aren’t able to install a dropper seatpost due to having narrow (sub-30.9mm) seat tubes. Crucially, XC bikes also still have rather old-fashioned geometry that often ignores descending prowess and is still heavily modelled on road bikes. This is all well and good if you’re Nino Schurter but for most people the end result is fairly terrifying on any technical terrain. As a result, even if you want to ride cross-country you’re probably better off on a (light as possible) trail bike than a sketchy XC bike.
Recommended mountain bike: light-as-you-can-afford hardtail or light full suspension with 100-120mm suspension and 29in wheels.
Read the mbr review of the Specialized Epic Evo
Choosing the best mountain bike for: Enduro riding
Enduro riding intentionally and unashamedly prioritises descending capability and speed. The terrain can resemble Downhill race tracks but there’s no uplift here. You have to pedal your way around. Enduro bikes are essentially longer travel (160+mm) Trail bikes with stronger parts. As a result they’re heavier than Trail bikes. Or the same weight and significantly more expensive. Enduro bikes are very much in vogue but you should be careful before you automatically head down this route. A couple of kilos may not sound much but it’s always there no matter what trail you’re on. If most of your riding is trail centres then an Enduro bike is going to be OTT and very probably slower than a Trail bike. One area where Enduro bikes are leading the way for all kinds of riding however is geometry. A cutting edge Enduro bike will have a riding position that bests both XC and Trail bikes for climbing, descending and contouring. Enduro bikes are at the forefront of mountain biking. A lightweight Enduro bike is an amazing thing. And amazingly expensive.
Recommended mountain bike: full suspension with 150-170mm suspension.
Read the mbr review of the Specialized Enduro Elite
Hardtail or full suspension?
It’s easy to assume that everyone would be riding full suspension bikes instead of hardtails if there was no price difference. This isn’t really true. Hardtails do have some advantages over full suspension bikes regardless of price tag.
Hardtails are lighter. Hardtails have less to go wrong or require servicing. Hardtails are easier to clean. Hardtails can be faster and more fun on smoother trails. Adding to this the fact that hardtails are cheaper than their full sus counterparts means that hardtails aren’t going to be extinct anytime soon.
Full suspension is still what most riders lust after, rightly or wrongly. What are the benefits of going full suspension? First and foremost, control. The comfort factor is much less important – which may surprise you but it’s true. Full suspension bikes track the ground better and as such offer greater traction. Full sussers are less skittish and sketchy to ride compared to hardtails. The fatigue and comfort benefits do exist but it’s the extra performance capability of full suspension that’s the main thing. Being less beaten up and less tired on longer rides is an added bonus of bounce.
What are the drawbacks of full suspension? They’re heavier than hardtails. They’re poorer specced (compared to hardtail of the same price). They have bearings and pivots that wear out and cost money. They can be mud traps. They can be difficult to clean properly. And if you don’t understand the basics of how to setup suspension then a full susser can ride really badly, inefficiently and sketchily.
Carbon or aluminium?
At the mid to high end level there’s something of a crossover point where you can sometimes choose between a carbon framed bike (with lower end parts) or an aluminium framed bike (with better bits) at around the same price point. We’d always recommend going for the better specced aluminium model.
Is carbon worth the extra money? For most riders, no it isn’t. Just how much extra does it cost anyway? To go carbon will cost you approximately an extra £1,000 (for the similarly equipped bike).
What does this £1,000 get you? A lighter frame for sure. But not that much lighter, maybe 700g or so. The more convincing argument for going carbon is not weight, it’s ride feel. Carbon bikes ride differently to aluminium bikes. Stiffer. Sometimes with a damped (dead) sort of feeling. And these days carbon bikes are often stronger than their aluminium counterparts.
The carbon feel and strength is what it’s all about. This is not to say that this racy, rally-car ‘carbon feel’ is going to suit everyone. Some riders prefer the feel of aluminium bikes over carbon.
Some people are even making big hype about steel again. This time steel full suspension. Maybe things can get too stiff on a mountain bike? Fatigue suffers. Line choice gets less forgiving. Maybe some chassis flex results in a faster ride? But then, steel full sussers are going to be even heavier than aluminium.
At the end of the day, the frame material isn’t going to affect most people’s bike riding. Tyres, wheels and suspension setup is far, far more significant. So we would actually say that frame material isn’t worth worrying about overly.
Which wheel size is best?
This old chestnut. Again, we’re going to be mildly controversial and say that the difference between 650b bikes and 29er bikes isn’t as pronounced as you may have been lead to believe.
Unlike a few years ago, nowadays you can get 29ers with decent amount of suspension travel (up to 160mm) and with decent geometry, so the wheel size debate has become less black and white than it used to be. You can get loads of ‘rad’ 29ers now.
29ers are more stable and have better grip. But they have unavoidably higher front ends and the rear tyre can hit your bum on steep stuff if you’re under 6ft tall. The higher wheel axles can make the bike feel taller in tight switchbacks and thus require more leaning over.
One things for sure, more people should try a 29er than currently do. The stigma of the awful early 29ers has lingered. A modern 29er is a totally different animal.
650b bikes are stiffer, can have lower front ends and the rear tyre won’t boot you up the behind on steeps. The lower wheel axles require less body english in tight hairpins so the bikes can feel more nimble for a given rider input.
If you’re 6ft tall or over, you’re probably going to better served by a 29er. If you’re under 5ft 6″ then a 29er is likely going to feel too big.
If you’re of average height, you need to try each wheel size for yourself. Ignore trends. Ignore haters. See for yourself.
Which suspension design is best?
A bonus debate for you. Sorry! Although there’s less hype and grand claims made about different suspension frame designs these days (compared to the slanging matches and OTT marketing of yore anyway) there is still a valid interest in how the designs differ from each other.
The mountain biking market is now mature and experienced enough to know that their is no single Best Suspension Design. The four-bar (or Horst Link) used to be the Holy Grail. Single pivots used to get ragged on for being crude. Neither of these stances are correct in 2017/18.
To be frank, pretty much all suspension designs are good. But they are not all the same. They do differ in how they feel and respond (to both the trail and to the rider onboard). Some are fussy in how precisely they’re set up, some are more forgiving. Some also require more maintenance than others.
The rear shock – and how you can tune it – is arguably more important than frame suspension design these days. It is now possible to do an awful to with a rear shock to alleviate any frame design niggles you may encounter. Bike too bob-prone, or wallowy, or harsh bottom out? Chances are something can be done with the rear shock to address this.
Basically, bike companies have got all the kooky and plain bad designs out of their system now. The differences between them are now extremely subtle. Learning about suspension theory and setup is more important.
Geometry, geometry, geometry
The angles and lengths of the frame tubes governs almost everything in how a bike will ride. The best suspension in the world counts for nought if the geometry is poor. Similarly, a bike with great geometry can often overcome any suspension shortcomings and ride just fine.
What’s the best geometry for a mountain bike? This is a tricky area and one which is still full of old myths and prejudices. But here’s our take on it…
Long reach (the distance between saddle and handlebars, in layman’s terms) is good. Steep seat angles are good. Slack head angles are good. And we’re not talking just ‘good for descending’. This geometry is good everywhere. Slack head angles don’t cause front end wandering on climbs (that’s caused by slack seat angles and/or short top tubes).
Low bottom bracket heights are generally good (for stability and for cornering) but riders who ride in rutted/tufty/stumpy terrain may get naffed off with frequent pedal strikes and so prefer a higher bottom bracket height and accept the compromise in handling.
Chainstay length is another area full of cliché. Short chainstays are seen as highly desirable. Long chainstays are seen as bad. Why is short good? We’re not sure it is particularly. It makes bikes easier to manual but that’s about it. They also can make bikes climb worse (wheelie prone). Long chainstays offer greater stability and climbing prowess.
Another aspect these days is the return of standover as being high on the important list. The advent of dropper posts with 150mm+ of travel has meant that bike designers are factoring shorter seat tube lengths in their bikes now so that they can fit in long drop dropper posts.
Truth be told though, you still can’t judge how a bike will ride by looking at its geometry chart. Geometry is a combination of multiple factors that all interact with each other. One isolated measurement doesn’t govern everything.
We’ve ridden plenty of ‘poor geometry on paper’ bikes that turn out to ride exceptionally well in the real world.
Having said that, don’t buy a bike with a short reach. Just don’t. Almost everything else in bike geometry can be changed (by saddle positioning, angleset headset, offset shock bushings, different length cranks, thinner pedals etc etc) but a short bike will always be a short bike no matter what you do.
How much should you spend?
If you have less than £1,000 to spend then we still think a hardtail is the way to go. Sub-£1k full sussers are going to be overly hefty and sport low-end kit that will impair your ride experience.
These days you can get capable and fun full suspension bikes from the £1,000 mark. They aren’t especially light but they aren’t restrictively heavy either. And the parts package on a good £1k susser will feature perfectly good stuff from recognised brands. Sure there’ll be some cost-cutting here and there, and some no-name finishing kit, but it won’t overly affect the bike’s ride.
What size bike should you get?
A lot of people are riding around the wrong size bike.
The first myth to bust is that smaller bikes are more nimble/playful/manoeuvrable. Nope. Smaller bikes are less stable, more sketchy and uncomfortable. Don’t buy a bike that’s too small thinking it’ll be alright. Don’t get suckered into buying an undersize bike because it’s at a bargain price.
A cheap bike that’s big enough for you and has good geometry will be infinitely better than a half-price bling bike that’s too small for you.
Don’t buy a too-small bike. Even if that’s what all your mates have done. Even if that’s what the bike shop staffer says. They’re wrong.
The best way to do it is consult with what the bike manufacturer’s height advice says. You should also check out our guide to choosing your mountain bike frame size. Once you’ve found what size the manufacturer (and us) advise, have a nosey at the next size up. Have a look at the seat tube length and standover. If you’d still be alright on the larger size, you should try both the recommended size and the next size up when you go to try the bike for size. Long top tubes can be addressed (improved in fact!) by fitting a shorter stem and moving the saddle forward on its rails.