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F-Si has always been about pushing the limits of what an XC hardtail is capable of, and the new version pushes it harder and further than ever.
F-Si has always been about pushing the limits of what an XC hardtail is capable of, and the new version pushes it harder and further than ever.
Cannondale

2020 Cannondale F-Si Carbon 5 Hardtail Mountain Bike in Black

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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

At 99 Bikes our priority is to ensure that you are highly satisfied with your purchase. In the unlikely event that you aren't, we offer a 30 day online return policy* in which you can receive a full refund. Any item including bikes (with the exception of food) can be returned to us for any reason provided it is received by us in an unused and resalable condition in or with its original packaging which must be undamaged. In the event an item is returned to ourselves in an unsuitable condition, we may have to return the item or offer a partial refund. Unless the return is due to a faulty product or an incorrect delivery on our part you will have to cover the cost of the return. If you believe that we should be covering the cost of the return please contact us in advance to discuss the available options.

In line with the customer rights act 2015 if you receive an item that is faulty, of un-satisfactory quality, unusable or that differs from how the product is described you are entitled to return the item for a full refund within 30 days of purchase.

Small Items - Parts & Accessories

Include the returns form and send it to us with the delivery company of your choosing - easy peasy!

Larger Items - Bikes / Bulky Items

If you wish to return bikes or bulky items such as forks or turbo trainers please contact our Returns Department to arrange a special courier collection. Contact us on our email address websales@99bikes.co.uk We can arrange collection for you from your home or work address, using our couriers ( You may be required to cover postages costs )

* Bulky Items Include - Bikes - Wheels/wheelsets - Turbo Trainers - Framesets - Forks - Groupsets - Car racks - Child Seats

Warranty Claims

Please contact us prior to returning so we can ensure the fastest suitable resolution for you: websales@99bikes.co.uk. We also ask that you contact us before having a 3rd party undertake work on an item purchased from 99 Bikess. Any work carried out without 99 Bikes consent will not be eligible for reimbursement and may void future warranty claims for that item.

2020 Cannondale F-Si Carbon 5 Hardtail Mountain Bike in Black

Season:2020

Brand:Cannondale

Code:C25500MBLK

A mountain race bike loaded with performance features that ensure victory, all while weighing next to nothing.

Key Benefits :

  • Designed For the W.
    At just 900 grams, F-Si is the lightest mountain bike frame we’ve ever made. Better still, our engineers built in real compliance, real durability, and the handling and features that really win races.
  • Next-Level Geometry
    F-Si attacks the steepest climbs and nastiest descents of modern World Cup XC courses. Ai offset drivetrain and OutFront steering geometry deliver an uncanny mix of stability, agility and traction.
  • The Best XC Fork…Period
    Simply the most advanced, smoothest, most precise-handling ultralight XC fork ever made. Its one-of-a-kind design lets it float through the chop and steer through the choss like nothing else.
All UK Mainland Bike Deliveries Over £999 - Free

Bike orders are sent via TNT/FedEx with estimated delivery within 1 working day after quoted dispatch time (For Scottish Highlands, Northern Ireland, Isle of Man and the Channel Islands deliveries please allow an additional 1-4 working days).
Bike orders under £999 will incur a £20 delivery fee

Free Delivery On Orders Over £50.00

When you spend more than £50.00 at 99 Bikes deliveries to a UK mainland address will be free (excludes bikes & large items).

Certain regions and territories of the UK will incur additional charges, details of which can be found on our delivery page.

Click & Collect Orders

Please be aware Click & Collect orders may take some time to fulfil. We advise not to travel to your chosen store until you have been notified that your order is ready for collection.

Spread the cost of your new bike, helmet, safety equipment and accessories paying via instalments being taken directly from your wage. The payments for the Cycle To Work scheme are taken out of your gross wage and your Tax & NI contributions are then worked out based on your new lower gross wage which is how you save money on your new bike and equipment.

At the end of the time period specified with your Cycle To Work scheme you then have the option of buying your bike or to continuing to use it while you work for the company. If you decide to purchase the bike, the balance you owe will be based on a percentage of how much the bike was worth at the time you took out the Cycle To Work scheme.

We know how eager you'll be to jump on your new bike and hit the dirt or tarmac, so we give you everything you need to get you set up quickly. For full instructions on how you're bike will arrive and what you'll need to do, visit our How Our Bikes Are Built page

Easy Set-Up Instructions

Have your brand spanking new bike ready to ride in less than 15 minutes with our easy to follow guide.

Free Multi-Tool

9 in 1 multi-tool to help you set up and maintain your bike.

Free Pedal Spanner

Attach your pedals with ease using our free tool. Please note pedals are not included with all bikes so please check the specification. You can shop our awesome range of pedals HERE

Technical Information
  • Frame  
    BallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset
  • Fork  
    Lefty Ocho, 29", 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 55mm offset
  • Rear Shock  
    Null
  • Rims  
    WTB STX i21 TCS, 28h, tubeless ready
  • Spokes  
    DT Swiss Champion
  • Pedals  
    Not Included
  • Crank  
    Truvativ Stylo 6K DUB, 34T, Ai offset
  • Bottom Bracket  
    SRAM DUB PF30 MTB83
  • Chain  
    SRAM NX Eagle, 12-speed
  • Rear Cogs  
    SRAM PG-1230, NX Eagle, 11-50, 12-speed
  • Front Derailleur  
    Null
  • Rear Derailleur  
    SRAM NX Eagle
  • Shifters  
    SRAM NX Eagle, 12-speed
  • Handlebar  
    Cannondale 3 Flat, 6061 double-butted Alloy, 31.8mm, 3° rise, 8° sweep, 760mm
  • Grips  
    Cannondale Locking Grips
  • Stem  
    Cannondale 3, 6061 Alloy, 31.8, 7°
  • Headset  
    Integrated, 1-1/8 to 1.5", sealed angular contact bearings (Integrated steer stop size small only)
  • Brakes  
    Shimano MT500 hydro disc, 160/160mm RT66 rotors
  • Brake Levers  
    Shimano MT500 hydro disc
  • E-Bike Display  
    Null
  • E-Bike Battery  
    Null
  • E-Bike Charger  
    Null
  • E-Bike Drive Unit  
    Null
  • Saddle  
    Fabric Scoop Flat Elite, cro-mo rails
  • Seatpost  
    Cannondale 3, 7075 Alloy, 27.2 x 400mm
  • Speeds  
    12
  • Extras  
    Speed Release rear axle
  • Connectivity 
    Wheel Sensor
  • Consumer Name 1 
    F-Si
  • Consumer Name 2 
    Carbon 4
  • Fork Travel 
    (F) 100mm
  • Frame Details  
    SAVE|PF30-83|Tapered head tube|Speed Release 12mm thru axle|Ai Offset
  • Frame Travel 
    Null
  • Front Hub 
    Lefty 60
  • Front Tire 
    (F) Schwalbe Racing Ray Performance 27.5/29 x 2.25", Addix Compound, tubeless ready
  • Front Tire Size 
    2.25
  • Material 
    Carbon
  • Rear Hub 
    Formula 12x148 w/ HG driver
  • Rear Tire 
    (R) Schwalbe Racing Ralph Performance 27.5/29 x 2.25" rear, Addix compound, tubeless ready
  • Tire Size 
    2.25
Sizing Information

Cannondale Bikes Size Guide

Please note the following size guides are a general overview and represent a rough guide to Cannondale sizing.
Each bike may deviate from these figures, please refer to the specific geometry details or contact us for more precise sizing.

Cannondale Road Bike Size Guide

SizeXXS/44XS/48S/51M/54L/56XL/58XXL/60
Height (cm)157 - 165160 - 170165 - 175170 - 180177 - 185182 - 193187 - 198

Cannondale Gravel Bike Size Guide

SizeXSSMMDLGXL
Height (cm)152 - 165162 - 175170 - 185180 - 193190 - 203

Cannondale Mountain Bike Size Guide

SizeXSSMMDLGXL
Height (cm)137 - 157154 - 165160 - 172170 - 182182 - 195

Cannondale Hybrid & Active BikeSize Guide

SizeXSSMMDLGXL
Height (cm)147 - 160157 - 170165 - 177175 - 187182 - 195
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