Great geometry and progressive sizing give the Demo 8 an edge

Product Overview

Specialized Demo 8.1 Alloy (2017)


  • Great geometry and progressive sizing give the Demo 8 an edge


  • Basic fork internals put the brakes on an otherwise rapid package


Specialized Demo 8.1 Alloy (2017) first ride


Price as reviewed:


The Specialized Demo 8.1 Alloy looks just as good as its carbon counterpart, but costs 50 per cent less. So what’s the catch?

>>> Eight of the most legendary downhill race runs

Need to know

  • Entry-level DH race bike with 200mm travel
  • Latest version of the aluminium 650b Demo mirrors the carbon design
  • Single-sided seat mast means springs can be changed quickly with minimal fuss
  • Narrow 135x12mm rear dropout spacing for improved clearance

When I first set eyes on the aluminium Demo 8 I had to squint to narrow my focus, just to be sure that it wasn’t actually made from carbon.

It could be that, at the ripe old age of 46, my eyesight isn’t what it used to be, but a more likely explanation for the initial double-take is Specialized’s cutting-edge production techniques; smooth, double-pass welds and swathes of complex hydroformed aluminium give the latest Demo 8 a distinctly organic look — a process that’s complicated further by the single-sided seat mast, which makes removing the shock that much easier.

While the front end of the alloy Demo masks its structural complexity, the rear end of the bike has actually been simplified. It’s still a classic FSR four-bar design, delivering 200mm of travel, but Specialized has ditched the long-standing sub-stay assembly that used to drive the shock. The main advantage of the new layout is that unsprung mass is reduced, allowing the rear suspension to react more quickly than before.

In order to keep the weight of the shock as low as possible in the frame, Specialized has also switched to a BB-centric main pivot, which brings the entire rear assembly closer to the ground.

With all the revisions, the 27.5in aluminium Demo now mirrors the more expensive carbon design that predates it, but does it ride as well? The short answer is yes… and no.

The shape, sizing and geometry are every bit as good as the carbon bike, so confidence levels are second to none straight out of the gate.

Testing it on the same Whistler bike park trails that I had ridden one month earlier on a bike costing more than double the money, the Demo instantly proved its worth. The other bike was a Trek Session 9.9 and even with its more sophisticated Fox suspension, the Trek always felt hamstrung by its lack of length and its overly high BB.

There’s simply no questioning the pedigree of the aluminium Demo 8 frame and its rear suspension performance, but some of the components are certainly lacking, especially when compared with the likes of the Canyon Sender and YT.

And while I’d argue that the geometry on the Demo is still marginally better than the Canyon Sender, and it offers a way better size range than the YT Tues, the package that you get on the Sender for roughly the same amount of money will go a long way to shaving precious seconds off your race times.

With that in mind, the biggest shortcoming on the Demo 8 1 Alloy is the more basic RC damper in the RockShox fork. It should be a relatively easy fix though, as you can upgrade to the Charger damper for just over £200, instantly transforming the fork into a Boxxer Team.

Everything else about the Demo’s parts package is pretty much bombproof, making it a great choice for any privateer racer looking for one of the fastest, friendliest bikes on the circuit.


Frame:M5 aluminium, S3 Geo, 200mm travel
Shock:Fox Van RC
Fork:RockShox Boxxer RC, 200mm travel
Wheels:Specialized hubs, Roval 650b i24mm rims, Specialized Butcher/Slaughter DH casing 27.5x2.5/2.3in tyres
Drivetrain:SRAM Descendant 32T 165mm chainset, GX r-mech and X7 10-speed shifter
Brakes:SRAM Guide R, 200/180mm
Components:Specialized DH 800mm bar, P-Series 45mm stem, alloy seatpost, BG Phenom Comp saddle
Sizes:Short, Medium, Long, X-Long
Weight:18.27kg (40.3lb)
Size ridden:Long
Head angle:63.4°
Seat angle:68°
BB height:339mm
Front centre:788mm
Down tube:715mm
Top tube:616mm