Silverback Siablo AL GRX

2025 RoadGravel Manufacturer page

Price: Not published

Prices shown first for United States
Europe: €1,999 Last known price
Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 11 40t / 11–42t
Gear range: 382%
Weight: 10.6 kg 23.4 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 144–154
SM 152–165
MD 163–172
LG 170–179
XL 177–188
XXL 185–195

Components

12 of 21 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Aluminium Gravel frameset, Custom Triple Butted Hydro-formed 6061 Frame, Flat-mount Disc Brake Mounts. Supports 700C and 650B Wheelsize, including Internal Routed Dropper Post Compatible. Not identified

Suspension

1 part

Fork

SB Advanced Dynamics Carbon Fork, 12mm thru-axle, Disc mount Not identified

Drivetrain

6 parts

Bottom bracket

BSA 68mm Not identified
Cassette
- Shimano SLX CS-M7000-11 11–42t
CS-M7000-11
Chain
- Shimano CN-HG601
CN-HG601
Crankset
- Shimano 40t
Rear derailleur
- Shimano GRX RD-RX810 11 speeds
RD-RX810
Shifters
- Shimano GRX ST-RX600
ST-RX600

Brakes

2 parts

Wheels and tires

4 parts

Cockpit and contact points

7 parts

Grips

Surface Seude tape, Plug with Expander Bolt Not identified
Handlebar

Surface lightweight Alloy, Ø31.8mm Not identified
Headset
- Token
Pedals

Not Included Not identified
Saddle

Surface Gravel optimised Not identified
Seatpost

Surface Alloy, Ø27.2mm, Length: 350mm Not identified
Stem

Surface lightweight Alloy Not identified

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 418mm

Stack 565mm

Wheelbase 1085mm

Head angle 70.0°

Seat angle 73.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	414	416	418	420	422	424
Stackmm	527	546	565	584	602	621
Top tube lengthmm	570	578	585	593	600	608
Seat tube lengthmm	440	475	510	530	550	580
Head tube lengthmm	100	120	140	160	180	200
Head tube angle	70°	70°	70°	70°	70°	70°
Seat tube angle	73.5°	73.5°	73.5°	73.5°	73.5°	73.5°
Chainstay lengthmm	445	445	445	445	445	445
Wheelbasemm	1068	1076	1085	1094	1103	1112
Front centermm	629	637	646	655	664	673
Bottom bracket dropmm	56	56	56	56	56	56
Bottom bracket heightmm	293	293	293	293	293	293
Standover heightmm	725	754	783	802	822	847
Fork rakemm	39	38	38	38	38	38
Trailmm	86	87	87	87	87	87
Stack/reach ratio	1.27	1.31	1.35	1.39	1.43	1.47

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Carbon
Bicycle weight: 10.6 kg

23.4 lb
Weight limit: 120 kg

264.6 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 40
Largest chainring: 40
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 27.6 in
Highest gear: 105.5 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire clearance: Maximum tire width: 45c
Tire width: 38c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

27.6 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Highest gear

105.5 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Shifting

Mechanical

688 of 1,999 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2025
Sample: 1,999 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.6 km/h
Highest gear: 40.4 km/h

Total gear range 382%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 27.6–105.5 gear inches
Class reference (p10–p90): 22.8–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2025
Lowest gear: 1536 bicycles with this information, 76.6% of the class
Highest gear: 1536 bicycles with this information, 76.6% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2025 builds
Specification	This bicycle Silverback Siablo AL GRX	Silverback Siablo CF GRX
Frame
Frame material	Aluminum	Carbon
Bicycle weight	10.6 kg	9.5 kg
Drivetrain
Rear sprockets	11	12
Smallest sprocket	11	10
Largest sprocket	42	51
Lowest gear	27.6 in	22.8 in
Highest gear	105.5 in	116.0 in
Other specifications
Tire clearance	Maximum tire width: 45c	Maximum tire width: 50c
Tire width	38c	40c