Cannondale F-Si Black Inc. 29er 2018 Mountain Bike
Frame:F-Si Asymmetric, BallisTec Hi-MOD Carbon, SPEED SAVE, PF30A, 1.5 Si Head Tube, 27.5" (S), 29" (M-X)
Fork:Lefty 2.0 Carbon, 100mm, XLR Isolated Damper Technology with XC+ tune and XLoc remote, Offset - 50mm (S), 55mm (M-X)
Headset:Cannondale HeadShok Si
Stem:Cannondale C1, 6061 Alloy, 1.5", 31.8, -5 deg.
Bars:ENVE Carbon Sweep, flat, 740mm
Front Brake:Shimano XTR Race, 160/160mm, Ice Tech Rotors
Rear Brake:Shimano XTR Race, 160/160mm, Ice Tech Rotors
Brake Lever:Shimano XTR Race, carbon lever
Front Mech:Shimano XTR Di2, direct mount
Rear Mech:Shimano XTR Di2, 11-speed
Shifters:Shimano XTR Di2, 2x11
Speed:22
Rims:ENVE Carbon M50, tubeless ready
Front Hub:Lefty 60 front, 28 hole
Rear Hub:Chris King rear, 28 hole (Ai Offset dish - Rear)
Spokes:DT Swiss AeroLite (Ai Offset dish - Rear)
Front Tyre:Schwalbe Racing Ralph EVO Snakeskin, 29/27.5x2.2.5", folding, tubeless ready
Rear Tyre:Schwalbe Racing Ralph EVO Snakeskin, 29/27.5x2.2.5", folding, tubeless ready
Seat Post:ENVE Carbon, Di2 compatible, 27.2x400mm
Chainset:Cannondale HollowGram SiSL2, Ai, BB30, 36/26
Bottom Bracket:Cannondale Alloy PressFit30
Chain:Shimano HG901, 11-speed
Pedals:Basic Resin Flat

What are the delivery costs?

We offer Free UK Mainland Delivery on all orders over £20. Products shipped to outlying UK regions are excluded from free shipping.

Standard delivery is normally 2 - 5 working days.

Please view our delivery page for full information on UK and international delivery costs.

The Future of XC.

A hardtail like no other. Designed to let you out-kick them on the climbs and out-rip them on the descents, this ultralight rocket is your ticket to the top of the podium.

Built for today’s hardcore XC, F-Si Carbon is the fastest XC hardtail ever made.

Key Features:

  • XC Agility Meets All-Mountain Stability – OutFront Steering Geometry gives you the best of both worlds: slack and stable on hectic descents, yet quick and nimble everywhere else.
  • Insane Traction – Without Compromise – Proprietary Ai offset drivetrain delivers super short chainstays for climb-winning traction and agile handling, without sacrificing mud/tyre clearance or limiting you to single ring set-ups.
  • Explosive Stiffness – Just say no to energy wasting flex. The F-Si Carbon is stiff in all the right places thanks to an evenly-dished Ai rear wheel, super-short chainstays and BallisTec Carbon frame construction.
  • The Best XC Fork... Period – With its unbelievable rigidity and confident steering precision, Lefty out-corners, out-handles and flat-out rides circles around its flexy XC competition. Custom extra-long fork offsets (rake) make our OutFront Steering Geometry possible.
  • Fit-Focused Wheel Diameters – To achieve the best possible fit for all riders, size small is designed around 27.5 wheels, while Medium thru XL get 29”.
  • Rider Position – Pure Modern XC. Low flat back, centered weight distribution.
  • Rider Profile – World Cup XC racers and anyone else with dreams of fast-paced XC glory. 

Occasionally, without notice, manufacturers change product design and/or specifications.