Stratos CF 2

 3118,00

  • Silverback Asymmetric Stratos Frame, 3K Twill CF, UD CF Flex Stays, Oversize Pivots, 100mm Travel, B
  • Fox Rhythm 34 Float 2 Position Remote Lockout, 29", Boost, 120mm travel
  • Surface Alloy TRS 23mm, 29", Shimano Centerlock hubs
  • Weight: 12.5kg
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Overview

The CF2 brings unbelievable value to the carbon Stratos range. Bred for the most demanding courses the world over, the Stratos was designed from the ground up to trounce any terrain. Asymmetric design dissipates load based on impact magnitude and suspension position, alleviating stresses where it's most concentrated. Paired with 12-Speed Shimano SLX 12spd, 120mm Fox 34 Rhythm fork, and Surface 23mm alloy wheels, it sets the scene for competitive racing. CF2 is the perfect race bike for unsponsored riders. Sharing a frame with the top end Stratos, the CF2 specification is chosen to carefully balance quality, weight and maximum service life. Oversized tapered pivot and Burst Flex suspension makes for a stiff, responsive, extremely light and agile race bike. The included dropper post opens a new world of riding possibilities and line choices. Stratos CF2 leaves nothing to chance.
Stratos CF 2 - Design and Innovation Award 2020 - Silverback Bikes

Surface Components are meticulously designed to create FSS - full system synergy. Surface control parts, wheels, saddles and dropper posts are engineered to offer reliable performance and component integration.

Silverback Ergonomic Science

Designer's Notes

Carbon Fiber Frame - Silverback

Carbon Fiber Frame

Asymmetric Frame - Silverback

Asymmetric Frame

BURST Flex - Silverback

BURST Flex

Internal Dropper Post Ready - Silverback

Internal Dropper Post Ready

Air Suspension Fork - Silverback

Air Suspension Fork

Bigger Volume Tyres - Silverback

Bigger Volume Tyres

Oversized Pivot Bearings - Silverback

Oversized Pivot Bearings

Internal Cable Routing - Silverback

Internal Cable Routing

Your Better Riding Experience

BOTNTOBEFAST

Bottle Cage CL - 071L

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Schwalbe Nobby Nic

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Surface

CF 1.0 Saddle

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Garmin Edge 1030 GPS Bike Computer

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Why it's best

  1. CF2 is a real mountain bike in every sense of the word. For the rider that pushes hard on the climbs, and even harder on the downhills.
  2. Hitting gaps, drops and technical descents without any drama is just the click of the included dropper post lever away.
  3. The beefy Fox 34 Rhythm 120mm fork turns the Stratos CF2 from a crisp race rocket, to a super versatile bike every rider can benefit from.
  4. Surface 23mm tubeless ready wheels offers a great balance of strength to weight - and is fit for purpose on this machine.
  5. The boxed asymmetric carbon frame is light where it can be, and stiff where it needs to be, resulting in a frame that is stronger than other bikes in the same weight category.
  6. The CF2 can fit one full size and one 500ml water bottle in the main frame (in opposite side entry cages). This makes it perfect for all day outrides.

Engineering Notes

120mm Suspension Fork

Stratos CF2 features a 120mm Fox 34 Rhythm suspension fork. This adds even more capability and forgiveness to the already capable geometry and platform. Perfect for rougher trails and more aggressive riders.

120mm Suspension Fork

Stratos CF2 features a 120mm Fox 34 Rhythm suspension fork. This adds even more capability and forgiveness to the already capable geometry and platform. Perfect for rougher trails and more aggressive riders.

1x drivetrain specific design

Front derailleurs are dead. With that comes a wider main pivot bearing stance for increased stiffness.

1x drivetrain specific design

Front derailleurs are dead. With that comes a wider main pivot bearing stance for increased stiffness.

Boxed asymmetric tube profiles

Asymmetric tubes allow for the dispersion of shock forces between the top tube and downtube. At the riding sag point most of the shock forces are directed along the top tube. At suspension bottom-out, the rear shock rotates and shock forces are split between the top tube and downtube via the single sided support strut.

Boxed asymmetric tube profiles

Asymmetric tubes allow for the dispersion of shock forces between the top tube and downtube. At the riding sag point most of the shock forces are directed along the top tube. At suspension bottom-out, the rear shock rotates and shock forces are split between the top tube and downtube via the single sided support strut.

Burst Flex suspension

Burst flex suspension platform utilizes flexible carbon seat stays, eliminating the need for a rotational pivot (bearings or bushings) in the rear triangle. Carbon fibre's properties work alongside the shock and leverage ratio to create a cohesive suspension platform. Elimination of a pivot point results a lighter frame that requires less maintenance.

Burst Flex suspension

Burst flex suspension platform utilizes flexible carbon seat stays, eliminating the need for a rotational pivot (bearings or bushings) in the rear triangle. Carbon fibre's properties work alongside the shock and leverage ratio to create a cohesive suspension platform. Elimination of a pivot point results a lighter frame that requires less maintenance.

In-triangle storage box cradle

Optional storage box for spares or nutrition without reducing bottle count. Can be detached when you'd rather save the weight. Top-opening zip for easy access while riding.

In-triangle storage box cradle

Optional storage box for spares or nutrition without reducing bottle count. Can be detached when you'd rather save the weight. Top-opening zip for easy access while riding.

Metric shock

Metric shocks perform better and have optional bearing hardware for low friction rotation, supported on the rocker side.

Metric shock

Metric shocks perform better and have optional bearing hardware for low friction rotation, supported on the rocker side.

Oversized tapered pivot

The massive main pivot uses angular contact headset bearings, with the larger 52mm bearing used on the drive side to cope with the additional chain forces. The angular contact design allows for bearing wear to be tightened out - the same as would be done at the headtube.

Oversized tapered pivot

The massive main pivot uses angular contact headset bearings, with the larger 52mm bearing used on the drive side to cope with the additional chain forces. The angular contact design allows for bearing wear to be tightened out - the same as would be done at the headtube.

POP geometry adapted for racing

As modern XCO and XCM courses become more technical, we've adapted the bikes to suit not only the current trails, but also where XC is headed. Slacker head angles and longer wheelbases, along with other geometry and suspension tweaks allow for a bike that is more capable and forgiving on the downhills, but does not sacrifice any uphill ability in the process.

POP geometry adapted for racing

As modern XCO and XCM courses become more technical, we've adapted the bikes to suit not only the current trails, but also where XC is headed. Slacker head angles and longer wheelbases, along with other geometry and suspension tweaks allow for a bike that is more capable and forgiving on the downhills, but does not sacrifice any uphill ability in the process.

Single sided support strut (rear shock to DT)

By triangulating the tubes it was possible to negate the need for a support strut on both sides. The role of the support strut is to split shock forces between the top tube and down tube.

Single sided support strut (rear shock to DT)

By triangulating the tubes it was possible to negate the need for a support strut on both sides. The role of the support strut is to split shock forces between the top tube and down tube.

SSS – Size Specific Stiffness

Each frame size is optimised for a different average rider weight, with large featuring the most progressive leverage curve to provide support for heavier rider.

SSS – Size Specific Stiffness

Each frame size is optimised for a different average rider weight, with large featuring the most progressive leverage curve to provide support for heavier rider.

Type of carbon used and lay up benefits

The structure is mainly composited of T700 UD carbon fibre. Offering equilibrium in stiffness to strength ratio. Rear triangle is constructed with migh-modulus carbon fibre to ensure indefinite fatigue life of the flex stays.
UD carbon fibre has absolute strength in the direction of the fibre. Strategically controlling the fibre lay-up, produces a matrix that is stiff where desired and strong where necessary, with minimum weight addition.
The frame is finished in a 3K Twill weave for a robust composite surface that can withstand any demands exerted by the rider.

Type of carbon used and lay up benefits

The structure is mainly composited of T700 UD carbon fibre. Offering equilibrium in stiffness to strength ratio. Rear triangle is constructed with migh-modulus carbon fibre to ensure indefinite fatigue life of the flex stays.
UD carbon fibre has absolute strength in the direction of the fibre. Strategically controlling the fibre lay-up, produces a matrix that is stiff where desired and strong where necessary, with minimum weight addition.
The frame is finished in a 3K Twill weave for a robust composite surface that can withstand any demands exerted by the rider.


Specifications

Crankset Shimano SLX, Hollowtech, 34t
Cassette Shimano SLX 12spd, 10-51T
Rear Der Shimano SLX M7100, 12spd
Shifters Shimano SLX 12 spd shifter
Bottom Bracket Shimano BB71 Pressfit
Fork Fox Rhythm 34 Float 2 Pos Remote 29", 120mm Travel, BOOST, 15x110mm, Tapered Steerer
Rear shock Fox Performance Elite Float 2 Pos Remote LV EVOL, 190x42mm Metric, Stratos Tune
Hubs Shimano Centerlock Hubs
Rims Surface Alloy, 23mm, TRS, 29"
Tyres Front: Maxxis Forekaster 29" x 2.35 EXO TR / Rear: Maxxis Rekon Race 29" x 2.35" EXO TR
Seatpost Surface - Dropper post, 125mm drop for S, 150mm for M/L/XL
Saddle Surface Race, Ti Alloy Rails
Handlebar Surface Alloy Butted, 31.8mm, 9deg backsweep, 5deg rise
Stem Surface 3D Forged Alloy, 7deg Rise, 60mm S/M, 75mm L/XL
Frame Silverback Asymmetric Stratos Frame, 3K Twill Carbon Fiber, UD Carbon Flex stays and oversize pivots. BOOST, 29", 100mm Travel, Tapered HT
Brake set Shimano Deore M6000
Weight TBA
Weight Limit 120kg

Find Your Fit

Proper bike fit is as important as getting the right bike for the job. Long term comfort and performance can be greatly improved with the right size bike. This acts as a guide only, so if you are unsure, please visit your Silverback reseller to be profesionally measured and sized for the perfect fit.

Stratos CF 2 Size Chart
Stratos CF 2 Geometry
Map Type S M L
A SEAT TUBE C/T 390 430 480
B HEAD TUBE ANGLE 69˚ 69˚ 69˚
C SEAT TUBE ANGLE 74.5˚ 74.5˚ 74.5˚
D TOP TUBE 575 597 625
E REACH 415 435 456
F CHAINSTAY LENGTH 435 435 435
G BB HEIGHT 337 337 337
H WHEELBASE 1113 1136 1164
I HEAD TUBE LENGTH 90 100 110
J STACK 576 586 594
K STANDOVER 710 774 800

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