Stratos CF 1

 4599

  • Silverback Asymmetric Stratos Frame, UD CF, Flex Stays, Oversize Pivots. BOOST
  • Fox Performance 32 Float SC Boost, 100mm
  • Surface Carbon rims on Surface straightpull hubs
  • Weight: 11.13kg
Clear
Terms & Conditions Apply

Overview

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 magnitude and position, levitating stresses where it's most concentrated. Paired with 12-Speed XX1, 100mm Fox 32 SC, and Surface Carbon wheels, it sets the scene for serious racing. Oversized tapered pivot and Burst Flex suspension makes for a stiff, responsive, extremely light and agile race bike. Dropper post compatibility for versatility, nothing will be in the way of your success on-board a Stratos.
XC mountain bike - Stratos CF 1 - Silverback Bikes

Engineering Notes

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.

Rider focused hydration

Front bottle is slightly offset to the drive-side of the frame for ease-of-access and good visibility when reaching for hydration mid-ride. Two bottle mounts in the main triangle. When is comes to water bottles, two is definitely better than one.

Rider focused hydration

Front bottle is slightly offset to the drive-side of the frame for ease-of-access and good visibility when reaching for hydration mid-ride. Two bottle mounts in the main triangle. When is comes to water bottles, two is definitely better than one.

Sag indicator

Don't leave setup up to chance, line up the rocker notch with the marking on the seatstay to guarantee perfect sag setup.

Sag indicator

Don't leave setup up to chance, line up the rocker notch with the marking on the seatstay to guarantee perfect sag setup.

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.

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.


Designer's Notes

BURST Flex

Asymmetric Frame

Carbon Fiber Frame

Internal Dropper Post Ready

Bigger Volume Tyres

Oversized Pivot Bearings

Internal Cable Routing

Why Stratos CF 1 Is Best

Specifications

Crankset SRAM X1 Eagle, DUB, 34T
Cassete SRAM CS XG 1295 Eagle 10-50T
Rear Der SRAM X01 Eagle
Front Der
Shifters SRAM GX Eagle Trigger shifter
Fork Fox Performance 32 Float Stepcast, 29", Fit 4, BOOST, 15x110mm, Tapered Steerer, 44mm Crown Offset
Rear shock Fox Performance Elite Float, 190x42mm Metric, Stratos Tune
Hubs Surface Straight pull, XD Driver
Rims Surface Carbon Rims
Tyres Maxxis Rekon Race 29" x 2.25" Tubeless Ready
Seatpost Carbon 30,9mm, Ti Bolts
Saddle Surface Race, Ti Alloy Rails
Handlebar SBC Carbon Low rise 31.8mm, 9deg Back sweep, 12mm Rise, 780mm
Stem Surface 3D Forged Alloy, 7deg Rise, 60mm S/M, 75mm L/XL
Frame Silverback Asymmetric Stratos Frame, UD Carbon Fiber with Injection molded carbon linkage, Flex stays and oversize pivots. BOOST, 29", Tapered HT
Braked set Shimano XT M8000
Weight 11.13kg
Weight Limit 120kg
Travel 100mm

Geometry

Stratos CF 1 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 113 1136 1164
I HEAD TUBE LENGTH 90 100 110
J STACK 576 586 594
K STANDOVER 710 774 800

Reviews

Reviews

  1. Pierre de Jager

    Received my Silverback Stratos on Thursday, 15 August 2019.
    What a magnificent bike !
    Thanks Marthinus Kruger of Silverback South Africa for brilliant service and an awesome bike.
    Will do my first long rides this weekend and give feedback.

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