Cannondale F-Si Carbon 4 27.5″ Mountain Bike 2018 – Hardtail MTB



Don’t be fooled by its unassumingly simple appearance – the Cannondale F-Si Carbon 4 27.5” hardtail mountain bike is every bit the tech-packed XC race bike. Using Cannondale’s own BallisTec carbon fibre, with in-built Speed SAVE micro-suspension, the F-Si MTB boasts an incredibly lightweight, stiff, strong, and surprisingly comfortable frame. Cannondale’s famous single-sided Lefty fork comes complete with 100mm of travel and PBR isolated damper technology with an XC+ tune, giving it impeccable poise and control over rough ground. Talking of control, the 27.5” wheels have low weight and low inertia, making the bike impressively agile at speed, and through tight & twisty sections. Coupled with the 2×11 speed gears, super-stiff Asymmetric Integration rear triangle, and the shortest-in-class chainstays, and you’ve got a bike that could lead you to your next race win.

For taller riders who prefer a larger 29er wheel size, there’s also the Cannondale F-Si Carbon 4 29er hardtail mountain bike, available in a Small frame size.

Key Features:

  • BallisTec carbon fibre frame, with Speed SAVE micro-suspension and Asymmetric Integration
  • Cannondale Lefty 2.0 100mm fork, with 2spring and PBR Isolated Damper technology, tuned for XC racing
  • Shimano SLX/XT 2×11 speed gears give you an incredible range for climbing and descending
  • Shimano Deore MT500 hydraulic discs with 180mm rotors deliver ample stopping power for any trail
  • Sizes: Small
  • Colour: Jet Black/Neon Spring Gloss
  • The Cannondale F-Si Carbon 4 27.5” hardtail mountain bike is available with 0% APR finance


A race 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.

All Tredz bikes are:

  • Fully built & ready to ride
  • Fully checked & tested by Cytech qualified mechanics
  • Available with 0% APR finance (up to 48 months) on any basket over £250
  • UK price match guarantee
  • 365 day no hassle returns
  • Free delivery in the UK Mainland on a date that suits you

In the box with every Tredz bike is:

  • Free Tredz 9 key trail tool
  • Free Tredz pedal spanner
  • Free basic pedals
  • Tredz drawstring kit bag
  • 16-point quality control check sheet
  • Basic bike setup instructions
  • Free Cycle Plan insurance voucher (8 weeks)

The Cannondale F-Si Carbon 4 27.5″ 2018 Features are:

Frame: F-Si, BallisTec Carbon, SPEED SAVE, PF30A, 1.5 Si Head Tube, Ai Offset, 27.5″ (S), 29″ (M-XL)

Fork: Lefty 2.0 Alloy OPI, 2Spring, 100mm, PBR Isolated Damper Technology with XC+ tune, 55mm offset (29), 50mm offset (27.5)

Headset: Cannondale HeadShok Si

Bars: Cannondale C3 flat, 6061 double-butted Alloy, 700mm

Stem: Cannondale C3, 6061 Alloy, 1.5″, 31.8, -5°

Shifters: Shimano SLX , 2×11

Rear Mech: Shimano XT, Shadow Plus, 11-speed

Speed: 22

Chainset: Cannondale Si, Ai, BB30, FSA 26/36 rings

Bottom Bracket: Cannondale Alloy PressFit30

Cassette: SunRace, 11-40, 11-speed

Chain: KMC X11, 11-speed

Front Brake: Shimano Deore MT500 hydro disc, 180mm

Rear Brake: Shimano Deore MT500 hydro disc, 160mm

Rims: WTB STP i19, Tubeless Ready

Front Hub: Lefty 60

Rear Hub: Formula DC-1422 Ai Offset dish

Tyres: Schwalbe Racing Ralph Performance 27.5×2.25″ Front – Schwalbe Racing Ralph Performance 27.5×2.25″ Rear

Seatpost: Cannondale C3, 6061 alloy, 27.2x350mm (XS,S,M) 400mm (L,X)

SKU: N/A Category:

S, M, L, XL, XXL


Jet Black/Neon Spring Gloss