Specialized Demo Expert 29" Mountain Bike 2020 - Downhill Full Suspension MTB
- ShowProduct Information If you don't know the Demo, it's time you get acquainted. Think of it as a two-wheeled, dirt-eating ... read more
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If you don't know the Demo, it's time you get acquainted. Think of it as a two-wheeled, dirt-eating Mario Andretti—it just wants to go fast. And this year, the Demo Expert 29 adds a new limb to the Demo family tree with an entirely new design that makes railing corners and casting floatation spells over rock gardens easier than ever. It has a ground-up new frame, improved kinematics, better suspension under braking, bigger wheels, and all the newest fancy bits that make this the fastest Demo we've ever made. Yeah, we say that every time, but the race clock doesn’t lie.
We've refined the Demo’s kinematics and suspension design. We had one overriding goal—improve the bike’s ability to carry momentum, no matter how technical the terrain. More momentum equals more speed, after all. We began by altering the Demo’s axle path, making it more rearward in the initial stages of travel where sensitivity is most critical. The revised axle path reduces hang-up on square-edged bumps and that, in turn, transfers more energy to the suspension and less to you. Now, you finish a day of runs with less fatigue and more control.
Bigger wheels maintain momentum better than smaller ones—particularly over technical terrain. The Demo 29 weds 200 millimetres of suspension travel with bigger wheels in a package that’s crazy fast, yet still bike-park playful. While we were at it, we also improved the Demo’s suspension performance under braking and added a bit more anti-squat to improve its pedalling performance. Bottom line, the new Demo rolls faster through chunky terrain than its predecessor. Sweet.
The Demo 29’s new shock linkage places weight low on the frame, giving the bike a lower centre of gravity and an even more confident and planted feel at speed. The new linkage is connected to a Trunnion-mount shock, which provides the Demo with the same 200 millimetres of rear suspension in a smaller (225x75mm) shock package. That smaller shock package helped us build a stiffer front down tube. And what’s more, the new Trunnion-mount shock features extra bushing overlap and adds ball bearings at the frame side of the shock, effectively boosting shock durability and making the suspension even smoother.
We’ve fine-tuned the Demo’s geometry, as well. A relatively short (105mm) head tube keeps handlebar height in the right spot with the 29-inch wheels. We also compensated for the increased wheel size at the bottom bracket, keeping it at 350mm, in order to strike a balance between cornering stability and ground clearance. And lastly, the reach was increased by 20mm across the size range, starting at 425mm with the S2.
The devil is in the details, though, and the same rings true for the Demo 29, where we added a bunch of little details that make it easier to live with. A newly designed, ribbed chainstay protector makes chain slap a thing of the past and nearly silences the drivetrain. A moulded down tube protector, meanwhile, protects the frame from rocks while a co-molded rear fender protects the shock from mud and debris. Clearance for up to 29x2.6" tyres allows for plenty of traction. And last, but not least, you're going to find 148mm rear-spaced hubs, a threaded 83mm GXP bottom bracket, 200mm available post-insertion, and internal and external cable routing options for rear brakes. Add it up and the Demo is as easy to work on as it is to find replacement parts for.
For the spec, we’ve hit the perfect balance of durability, lightweight, and reliability. You're going to find a SRAM GX drivetrain, powerful SRAM Code R 4-piston brakes, a RockShox Super Deluxe RC World Cup rear shock, a BoXXer RC 29 fork, and our Butcher tyres with an all-new BLCK DMND casing that rolls fast and is ready for a ton of abuse.
Occasionally, without notice, manufacturers change product design and/or specifications.
|Frame:||M5 alloy, Style-Specific DH Geometry, BSA threaded BB, full internal cable routing with option for full external brake, 148mm rear spacing, 200mm of travel|
|Fork:||RockShox BoXXer RC 29, DebonAir spring, adjustable low-speed compression, adjustable rebound, short crown, 20x110mm thru-axle, 56mm offset, 200mm of travel|
|Rear Shock:||RockShox Super Deluxe RC World Cup, low-speed compression adjust, external rebound adjust, Trunnion mount, 225x75|
|Stem:||Specialized Direct Mount DH Stem, two-piece, forged alloy, 45mm|
|Bars:||Specialized, 7050 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 800mm width|
|Front Brake:||SRAM Code R, 4-piston caliper, hydraulic disc, 200mm|
|Rear Brake:||SRAM Code R, 4-piston caliper, hydraulic disc, 200mm|
|Rear Mech:||SRAM, GX, Type 2.1, medium cage|
|Shifters:||SRAM GX, trigger, 10-speed|
|Rims:||Roval 29" Alloy DH, 28mm internal width, 28h|
|Front Hub:||Specialized disc, alloy flange & disc mount, sealed cartridge bearings, 20x110mm thru-axle, 28h|
|Rear Hub:||Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h|
|Spokes:||DT Swiss Industry|
|Front Tyre:||Butcher BLCK DMND, 2Bliss Ready, 29x2.6"|
|Rear Tyre:||Butcher BLCK DMND, 2Bliss Ready, 29x2.6"|
|Seat Post:||Specialized, 6061 alloy, 2-bolt clamp, 0mm setback, 30.9mm|
|Saddle:||Body Geometry Henge DH, hollow cro-mo rails,130mm|
|Chainset:||SRAM Descendant, GXP, alloy, 94 BCD, 34T, 165mm crankarm, MRP SXg CS ISCG-05 chainguide|
|Bottom Bracket:||SRAM GXP, 83mm|
|Chain:||SRAM PC-1031, 10-speed|
|Cassette:||SRAM PG-1030, 10 speed, 11-36t (*last three cogs removed)|
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Mountain Bike Sizing
XXS - 13"
XS - 15"
S - 16"
M - 18"
L - 19"
XL - 20"
XXL - 21"
XXXL - 22"
Read our bike size guide for more information on sizing.
Mountain bike size table
Mountain bike size (Inch)
4’8” – 5’1”
143 – 155 cm
13” – XXS
5’1” – 5’4”
155 – 163 cm
15” – XS
5’4” – 5’7”
163 – 170 cm
16” – S
5’7” – 5’10”
170 – 178 cm
18” – M
5’10” – 6’0”
178 – 183 cm
19” – L
6’0” – 6’3”
183 – 191 cm
20” – XL
6’3” – 6’5”
191 – 196 cm
21” – XXL
6’5” – 6’9”
196 – 205 cm
22” – XXXL
Please note, all size information is provided as a guide - if you're unsure or need any further assistance you can call us on 01792 799508 ... we're happy to help!
Full Sus MTB Guide
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Delivery & Guarantee
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What's In The Box
What's In The Box
As cyclists ourselves, we know you will be keen to get out on your new bike as soon as possible. That's why we provide you with all the essential kit you need to get your shiny new bike rolling for the first time.
Most bikes don't come with pedals as standard so we include a set of basic pedals, free of charge with every bike we send out. We will also provide you with a pedal spanner to fit them and a 9-key trail tool, along with full instructions for setting your bike up out of the box. Each bike is sent out with a 16 point, quality control check sheet so you can be confident that your bike has been fully checked by our qualified mechanics.
- Basic setup instructions
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- Free tredz multitool
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- Free basic pedals
- Free drawstring kit bag
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All these items are provided at no extra charge and are packed into a Tredz drawstring bag that doubles up as a handy backpack for carrying your ride essentials.
- Basic bike setup instructions
- Free ‘basic’ pedals
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- Free Tredz 9-key trail tool
- Free Tredz drawstring bag
- Free 8 weeks insurance voucher
- 16 point, quality control check sheet
Read our bike setup guide.
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