With fork technology evolving, the singletrack is getting faster and faster - our pick of the best mountain bike forks will help you run smoother.
If you’re looking to make a significant improvement to a mountain bike’s ride quality, upgrading to the best mountain bike suspension forks is a smart option. The top models are likely to be one of the biggest investments you’ll make, but they pack the potential to totally transform your riding experience.
The best mountain bike forks
- RockShox SID Ultimate review – BEST XC FORK
- RockShox Pike Ultimate review – BEST TRAIL FORK
- Fox Float 38 Performance Elite review – BEST ENDURO FORK
- Marzocchi Bomber Z2 review – BEST VALUE FORK
- Cane Creek Helm Air MKIII review
- Fox 36 Factory GRIP2 review
- RockShox Lyrik RC2 review
- RockShox Zeb Ultimate review
- DVO Onyx SC D1 review
- Öhlins RFX 36 M2 review
- Formula Selva R review
How we tested mountain bike forks
With plenty of time to put these forks through their paces, we ended riding everywhere from uplift days at BikePark Wales, Dyfi Bike Park and Revolution Bike Park, to big days out hammering Lake District bedrock. The forks here also either did extended time on Alpine riding trips, being pummelled by 10,000s of metres descending, or faced accelerated forces bolted to various all- mountain e-bikes.
All forks were then back-to-back tested systematically on the same bike (in the dry for maximum speeds and loads) on a local test track. The track we chose had a good mix of steep, twisty ruts up top and then high-speed, beaten-up braking bumps and berms towards the bottom. It’s a track known intimately to all test riders and chosen for how hard it works even a modern suspension fork.
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Best mountain bike forks:
RockShox SID Ultimate
Best XC fork
Price: £869.00 | Weight: 1,508g | Offset: 44mm | Wheel size: 29in | Travel: 120mm | Rating: 10/10
Pros: Great combination of low weight and supple suspending
Cons: Price tag isn’t very light
The SID has a longstanding name in XC circles and the venerable name got a thorough dusting off and rejigging last year. The result is an incredibly impressive fork that arguably bridges the gap between the masochistic world of XC racing and the baggy shorted smile-time of trail riding. Having said that, we really think the 35mm stanchion version featured here is the one most people should go for. Leave the skinny 32mm version for World Cup wannabes. Even the 35mm stanchion version is lighter than anything you can claim to be its nearest rival (it’s 150g less than Fox 34 Step Cast for example). Besides by reassuring stiffness – and the attendant handling accuracy – the proof is in the pounding. And the SID doesn’t give you a pounding. Sure, when ridden hard you max out the travel a few times but it’s never overly harsh or alarming. Nor does the fork dive too much, despite its suppleness around the sag point. You have to have a brain to ride the SID but you don’t have to treat it with kid gloves or reign in your riding too much. Did someone say down-country perfection?
RockShox Pike Ultimate
Best trail fork
Price: £862 | Weight: 1,890g | Offset: 37mm/46mm (27.5in), 42mm/51mm (29in) | Travel: 120mm, 130mm, 140mm, 150mm, 160mm | Rating: 10/10
Pros: Sits high for a more stable dynamic geometry, yet also reacts quickly and offers great sensitivity
Cons: Not as sturdy or grippy as a Lyrik if you stray into burlier terrain
The latest Pike goes up to 160mm travel (120-150mm on 29ers), with the Ultimate version here using a Charger RC2.1 damper offering high and low-speed compression adjustment. An updated RCT3 damper (similar to the original Pike) is available in cheaper models. Internal updates have centred on reducing friction and increasing suppleness to better track bumps, with slippier SKF seals, special damping oil that flows quietly and tweaks to both damper internals and the air seal head upping smoothness levels – subtle incremental changes that have made the fork more sensitive than ever. Overall, it’s great value, easy to set up, low maintenance and offers a great balance of stiffness, weight and trail riding performance. Unless you’re running a big travel enduro bike, the Pike is all you need.
Fox Float 38 Performance Elite
Best enduro fork
Price: £1,199.00 | Weight: 2,360g | Travel: 160-180mm | Wheel sizes: 27.5 or 29in | Rating: 10/10
Pros: Fox’s best just gets better; even light riders are well catered for now
Cons: Yep, you guessed it: price tag
In back-to-back testing at BikePark Wales, Fox’s 38 clearly had the edge over the RockShox Zeb on the same tracks on the same day, to the point we started to think that our Zeb was in need of a service. To double check, we also repeated the test closer to home with a fresh Zeb and reached the exact same conclusion – Fox’s fork just feels more sensitive and slightly more composed. For a lot of riders, the 38 will be out of budget, even in the cheaper GRIP guise, and in that case, we’d recommend the Zeb or a DVO Onyx, which was a real contender in this test and totally delivered on a really demanding week’s riding in the Alps. However, if you have the funds and/or you’re looking at a brand-new complete bike rather than a fork upgrade, we’d go for a Fox 38 every time. The Fox 38 just feels like it’s in the correct part of the stroke all the time and, unlike a lot of rival forks, full-travel is actually possible to achieve.
Marzocchi Bomber Z2
Best value fork
Price: £549 | Weight: 2,000g | Offset: 44, 51mm | Travel: 100, 120, 130, 140, 150mm | Rating: 9/10
Pros: Great suspension action and chassis stiffness. Good value for a great fork.
Cons: Does look and feel a bit cheap
The fork is noticeably stiffer fore-aft than a Fox 34. The fork takes mid- and big sized hits truly excellently. No spiking, binding or unpredictable deflection. It definitely isn’t as supple off-the-top as higher end forks but… it didn’t really bother us. And if less suppleness is the price to pay for having seals and damping system that keep the baddies out for 125 hours between services, we think that’s fair enough. We’d actually rather have a Bomber Z2 than a more expensive Fox 34 due to its stiffer construction and the knock-on effect this lack of flex has on the fork’s predictability and consistency. Under braking or hard cornering, the Z2 leaves other 34 and 35mm stanchion forks found wanting. Sure, this is principally due to thicker wall 6000 alloy stanchions tubing but… it works. Heavier yes. But stiffer. And cheaper.
Cane Creek Helm Air MKII
Price: £899 | Weight: 2,400g | Offset: 44mm | Travel: 130-160 (internally adjustable) | Rating: 9/10
Pros: One of the best at beating trail chatter. Sheer traction levels from that coil spring.
Cons: Coil brings weight
Silky smooth damping, excellent grip and hand comfort. Yes, it’s a tad heavy, and more significantly, the full 160mm travel is unattainable for some riders; we managed just over 150mm, earned on the heaviest landing overshooting a big jump. That said, this Helm Coil trumps any other fork we’ve used in terms of smoothness and calming fatigue by ironing out stutter bumps and high-frequency chatter. It clearly has supreme traction when leant right over on tyre edge blocks on off-cambers or super-slippery terrain, which means the Helm is a riot on a muddy day and really allows you to really take the mickey pushing the limits of traction. This is a massive benefit that will always rule over some of small negatives here for a certain breed of riders too.
Fox 36 Factory GRIP2
Price: £1,159 | Weight: 2,220g | Offset: 44mm or 51mm (29in), 37 or 44mm (27.5in) | Travel: 150 or 160mm | Rating: 10/10
Pros: The best ever 36 by far. Smooth and delicate everywhere.
Cons: The price tag
The new 36 never gets flustered and absorbs hits of every size calmly with an initial dull slurp that feels like your tyre has less air pressure inside. On one local trail section with brain-rattling high-speed moto whoops, it danced over crests without jiggling vision and balance, while most forks jackhammered and pitched the back end of the bike in their wake. Touch and bump absorption feel consistent whether absolutely hauling into square edges, or plopping off slow speed steps too. The latest Factory 36 feels like floating in a bath of oil, but also informs enough about the terrain to ride precisely and actively by never being too wallowey or mushy. The superb performance comes at a considerable financial premium to its closest rival – the RockShox’s Lyrik – however, plus all the new features add a chunk of weight over the older model.
RockShox Lyrik RC2
Premium performance for under a grand
Price: £989.00 | Weight: 2,010g | Offset: 39mm, 46mm | Travel: 150-180mm | Rating: 10/10
Pros: Super supple off-the-top
Cons: Aforementioned suppleness can require careful damping adjustment
The Lyrik RC2 impressed us enough in its launch year to make it into our Editor’s Choice with a perfect 10/10. The following year RockShox took on board feedback from lighter riders, tweaking the damping tunes to give them a more useable range, as well as working on reducing friction throughout the internals. The result is you can now gain even more support without adding harshness, along with less fatigue on long runs. You still benefit from class-leading sensitivity, excellent reliability and a price that undercuts the closest competition (just about). The main issue with the Lyrik is that the new forks from rival Fox have caught up and slightly surpassed the Lyrik in terms of all-round damping excellence. Having said that, the already smaller-RRP Lyriks can be found significantly cheaper than their equivalent Fox forks.
RockShox Zeb Ultimate
Easy to live with and more affordable
Price: £969.00 | Weight: 2,280g | Wheel sizes: 27.5 or 29in | Travel: 160-190mm | Rating: 9/10
Pros: Great option for ebikes and/or heavier riders
Cons: Damping not quite as amazing as rival forks
Although the Zeb is slightly less adjustable than its rival Fox 38 (above), it is a bit lighter and more importantly is cheaper. The Zeb is genuinely, noticeably stiffer than the RockShox Lyrik, which is partly due to the overall beefier chassis but also due to the increase in bushing overlap inside the fork. The damper is RockShox’s best: the Charger 2.1 RC. Which, although not quite as externally adjustable of the Fox 38’s damper, has more than enough adjustment on offer and is arguably easier to dial in and live with. The Charger 2.1 RC is definitely worth the extra money over the cheaper Zeb forks that come with different dampers. All in all, a great fork that may not be quite as amazing as a Fox 38 or a DVO Onyx but can be had for significantly less money if you shop around.
DVO Onyx SC D1
Price: £999.95 | Weight: 2,339g | Wheel sizes: 27.5 or 29in | Travel: 160-180mm | Rating: 9/10
Pros: Great levels of adjustment and super tenacious in the slidey stuff
Cons: Not quite a Fox 38
36mm stanchion forks have been around for a long time now in mountain biking but these DVO Onyx take the standard to the next level with thick crown design, relatively lengthy bushing overlap and tapered alloy stanchions that leave material where its needed and removes where it isn’t. The damping feel of the Onyx is seriously impressive; it feels constantly alive and at work. There’s plenty of adjustment on offer and DVO’s unique OTT (Off The Top) adjustment for the way the fork behaves in the first 30% of the travel is very useful for getting the fork to behave how you personally like it to whether than be ground-hugging slurpy or dig-in sporty. For 95% of riding the Onyx is as good as they come. It’s only in the really, really prolonged hefty rough chunder terrain that it isn’t quite as forgiving as the Fox 38, and achieving full travel is not a common occurrence. Needless to say though the DVO Onyx is by far teh best DVO fork we’ve ever experienced and should find fans amongst riders who ride slippery, sketchy terrain.
Öhlins RFX 36 M2
Glimpses of brilliance
Price: £1,245.00 | Weight: 2,098g | Travel: 120-170mm | Wheel sizes: 27.5 or 29in | Rating: 9/10
Pros: Impressive craftmanship and great platform for tinkerers
Cons: Requires a tinkerer, and that price tag
The RFX 36 M2 is available in coil version as well as this air spring version that we tested. This fork uses the TTX 18 damping cartridge that’s found in Loic Bruni’s bike (in theory at least, we wouldn’t be surprised if Bruni’s damper was completely bespoke but anyway…) The TTX damper has the usual auto-equalising positive and negative air chambers but it is also bolstered by a third air chamber that controls the end-stroke ramp-up. As well as being more accurate than volume spacers, this design also adds support to more of the mid-stroke as opposed to just affecting the very last part of travel. Light riders may find the fork a tad on the overdamped side of things but racers and/or heavier riders will be fine. The feel of an Öhlins is markedly different to more mainstream suspension brands in that it doesn’t feel as overtly plush or supple. It can feel a bit stiff or sticky during carpark testing but get it out n the trail and you’ll be surprised. It’s actually one of the grippiest forks out on roots or wet rocks. Be warned though: it’s not a fit and forget fork. It uses a modest amount of bath oil inside and as such benefits from more frequent strip downs and an owner who enjoys such things.
Formula Selva R
Needs careful setting up but it’s worth it
Price: £1,119 | Weight: 2,140g | Offset: 46mm or 51mm (29in), 46mm (27.5in) | Travel: 130-160mm (29in), 120-170mm (27.5in) | Rating: 9/10
Pros: The most broadly adjustable fork out there. Not fit and forget – so great for tinkerers.
Cons: Not fit and forget
We could dial in a really calm, ground-hugging feel with excellent control and stability from both the blue and red CST valves we tried (with a tweak of the air spring). The damping feels very smooth and rounded in both directions, and you can dial in a chunk of compression on the blue dial (which affects both low and high-speed damping) without adding too much harshness or vibration at the hands. The rebound range was appropriate for our weight and silent and smooth in operation too. The extra time and money required to dial in the ultimate suspension won’t be for everyone, but this impressive Formula Selva R offers a ‘factory’ level of tunability without the need to send it off for retuning, provided you know exactly what ride characteristics you’re looking for.
Know the best mountain bike forks:
With suspension brands continually updating their products for improved performance, fork technology is a constantly evolving landscape. Leading players like Fox and RockShox will be familiar as original equipment on complete bike packages, while he smaller firms here have big ambitions for a slice of the aftermarket pie. With trickle-down development from oher areas such as motocross and rallying, there’s a really broad approach to design, technology and tunability among the brands represented.
Considering a fork literally just has to slide up and down to absorb bumps and stabilise the rider, a huge amount of R&D and technology lurks inside. Chassis stiffness, weight, damper architecture, seal and bushing friction, and adjustability are just some of the factors suspension engineers strive to improve. Forks also have to work for a wide range of rider styles and weights.
Most high-end forks come with mind-boggling adjustability, but whether you’re a suspension expert, or you just want to enjoy more speed, comfort and control, for this buyer’s guide put in the hard miles to really get to the bottom of which model delivers ultimate performance on the trail.
Air-sprung forks support rider weight with a tuneable air cushion. Air pressure is added via a Schrader valve with a specific high-pressure shock pump to tune ride feel and adjust spring rate and support.
These aren’t used on every fork, but tweaking the size of the (positive) air chamber by adding or removing volume spacers (or in-built systems to do the same) affects the spring curve. More spacers increases spring progression and helps prevent harsh bottom-outs, while fewer spacers (a larger internal volume) softens the end stroke. Öhlins uses a separate, third, ramp-up chamber to tune progressivity.
Dials on the top and bottom of the fork legs adjust parameters to tune support and control. Separate damping dials allow specific tuning options as to how much oil is allowed through ports and shims inside to absorb impacts, but more options also introduce more opportunities to mess up settings. Having said that, most suspension brands and bike companies now offer decent tuning guides according to body weight, and these will give you a good start point to work from.
Stanchion diameter is an important metric for overall stiffness, with thicker fork legs generally adding weight. Bushing size and overlap, plus crown and brace construction also affect rigidity. Tapered steerer tubes are the norm – 1 1/8in to 1.5in at the base. Lower-leg assemblies use cast magnesium to save weight, and all forks here use a Boost 110mm axle spacing with quick- release-style or Allen-key fixings.
Positive and negative springs
Within the air spring there are typically two separate elements balancing breakaway friction and small-bump sensitivity against support. A negative spring pushes back against the main positive spring, and either takes the form of a separate (automatically equalising) air chamber or a coil spring.
Fork rake or offset has evolved as an important design element. Most brands now offer two different offsets in each wheel size, ranging from 37mm up to 51mm. It’s complicated, but offset affects steering feel and tyre stabilising force, so shorter offsets offer more stability and a ride quality that emulates a slacker head angle, while still keeping the bike’s wheelbase shorter.
Compression damping controls the rate at which displaced damper fluid is allowed to move during bump events. Low-speed controls low shaft-speed impacts like body weight shifts and rolling terrain, and high- speed damping absorbs harsh impacts like square bump faces and landings. Forcing oil through ports or shim stacks generates damping resistance, with energy converted into heat.
This is the damping circuit that controls the speed that the fork returns to sag after a bump event. Low-speed damping is the most common external adjustment. The damping circuit uses orifices and shim stacks to regulate the oil flow – ports can be opened or closed and shims made stiffer or softer. Some systems also act ‘dynamically’ and respond differently according to the shaft speeds (the speed the legs slide up or down).