Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
We've partnered with Pedalsure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and claim.
Specialized Demo Expert 29"/27.5" Mountain Bike 2022
The Specialized Demo Expert 29"/27.5" Mountain Bike has been conceived to conquer downhill tracks of World Cup severity with maximum speed and control. The M5 alloy frame is light, laterally stiff and robust and integrates a RockShox Super Deluxe Select Coil shock with low-speed compression and rebound adjustment to guarantee traction and composure across the roughest terrain. This coil is included within a suspension design that features advanced kinematics and a more rearward axle path, ensuring that the heaviest impacts are soaked up with consummate ease. A RockShox BoXXer Select suspension fork partners the frame, utilising its 200mm of plush travel to increase line accuracy, comfort and confidence when the jumps and obstacles are at their most daunting.
The frame can accept 27.5" or 29" wheels, and the former size is specced within this build at the back to grant extra agility during technical runs. Within a mullet configuration, the 29" front wheel adds extra traction and momentum to the ride. Both wheels have bombproof, downhill-inspired constructuions and are propelled by a slick-shifting SRAM GX DH drivetrain. SRAM 4-piston hydraulic disc brakes finalise the build with precise stopping power in all conditions.
- A burly, accurate and fast downhill bike for conquering daredevil descents at breakneck speeds
- The M5 alloy frame is light, stiff and strong
- A RockShox Super Deluxe Select Coil shock integrated into the frame’s rear can handle the biggest hits of the most challenging World Cup downhill tracks
- The coil shock offers external low speed compression and rebound adjustment for guaranteed traction and composure
- The rear suspension’s advanced kinematics and more rearward axle path better handles big impacts, affording more momentum and control
- A Trunnion mount within the rear suspension configuration offers extra bushing overlap for increased durability
- The RockShox BoXXer Select suspension fork’s 200mm of travel will ensures smoother, faster, and more confident feeling runs
- The frame design uses flip chips to accommodate a 29” or 27.5” rear wheel for a tailored ride depending on the terrain
- This build comes supplied with a 29” front wheel for extra traction and a 27.5” rear wheel to increase manoeuvrability
- The wheels have a bombproof build to handle the roughest riding
- SRAM’s GX DH, 7-speed gear setup provides incredibly accurate shifting
- SRAM 4-piston hydraulic disc brakes improve stopping power and precision in all conditions
|Frame||Specialized M5 alloy, Style-Specific DH Geometry, horst pivot flip chip for 27.5 or 29 rear wheel, BSA threaded BB, full internal cable routing with option for full external brake, 148mm rear spacing, sealed cartridge bearing pivots, replaceable derailleur hanger, 200mm of travel|
|Fork||RockShox BoXXer Select 29, DH DebonAir spring, adjustable low-speed compression, adjustable rebound, short crown, 20x110mm thru-axle, 56mm offset, 200mm of travel|
|Rear Shock||RockShox Super Deluxe Select Coil, external rebound adjust, Trunnion mount, 225x75|
|Bottom Bracket||SRAM DUB, 83mm, threaded|
|Stem||Truvativ Descendant 35mm Direct Mount Stem, 50mm length|
|Handlebar||Specialized Trail, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 30mm rise, 800mm, 35mm clamp|
|Grips||Specialized Trail Grips|
|Front Brake||SRAM Code RS, 4-piston caliper, hydraulic disc, 200mm|
|Rear Brake||SRAM Code RS, 4-piston caliper, hydraulic disc, 200mm|
|Brake Levers||SRAM Code RS, hydraulic|
|Rear Derailleur||SRAM GX DH, 7-speed, trigger|
|Shift Levers||SRAM GX DH, trigger, 7-speed|
|Chain||SRAM PC1110 with Powerlink™|
|Cassette||SRAM GX DH, 7-speed, 11-24t|
|Crankset||DESCENDANT DH, DUB, alloy, Direct mount ring, 165mm, 34T|
|Front Wheel||Rim - Roval 29" Alloy DH, 28mm internal width, 28h, tubeless-ready / Hub - Alloy, sealed cartridge bearings, 20x110mm, 28h / Spokes - DT Swiss Industry|
|Rear Wheel||Rim - Roval 27.5" Alloy DH, 28mm internal width, 32h, tubeless-ready / Hub - Alloy, sealed cartridge bearings, 12x148mm thru-axle, 32h / Spokes - DT Swiss Industry|
|Front Tyre||Specialized Butcher, GRID GRAVITY casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3", tubeless-ready clincher|
|Rear Tyre||Specialized Butcher, GRID GRAVITY casing, GRIPTON® T9 compound, 27.5x2.3", tubeless-ready clincher|
|Saddle||Specialized Body Geometry Henge DH, hollow Cro-Mo rails|
|Seatpost||Specialized, 6061 alloy, 2-bolt clamp, 0mm setback, 30.9mm|
|Pedals||Available to be purchased separately|
Built, Checked, Tuned and Tested
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.