Ridley Helium Disc Shimano 105 2x12

2026 RoadRace Manufacturer page

Price: Not published

Prices shown first for United States
Europe: €3,199 Last known price
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 34–50t / 11–34t
Gear range: 455%
Frame: Carbon
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

12 of 17 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

Helium Disc, 24-30T HM UD Carbon, Stiffness-to-Weight optimised Lay-Up, F-Steerer Head Tube, TA 12x142mm Not identified

Suspension

1 part

Fork

Helium Disc, 24-30T HM UD Carbon, F-Steerer, TA 12x100mm Not identified

Drivetrain

7 parts

Bottom bracket
- Ridley
Cassette
- Shimano 105 CS-R7101-12 12 speeds
CS-R7101-12
Chain
- KMC
Crankset
- Shimano 105 50/34t
Front derailleur
- Shimano 105
Rear derailleur
- Shimano 105
Shifters
- Shimano 105

Brakes

2 parts

Brakes

Disc Not identified
Disc rotors

REVER Flat Mount Adapter, Rear 140 -> 160 Not identified

Wheels and tires

1 part

Rims
- Forza

Cockpit and contact points

5 parts

Handlebar
- Deda
Pedals

Not included ** Not identified
Saddle
- Selle Italia MODEL Y
Seatpost
- Forza
Stem
- Deda

Sizes and geometry

6 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size SM

Table

Reach 384mm

Stack 542mm

Wheelbase 977mm

Head angle 73.0°

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 Reach Stack

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	379	374	384	390	396	403
Stackmm	507	527	542	573	599	624
Top tube lengthmm	515	525	545	565	585	600
Seat tube lengthmm	450	480	510	540	570	600
Head tube lengthmm	110	130	145	175	205	230
Head tube angle	71.8°	72°	73°	73.5°	73.5°	74°
Seat tube angle	75°	74°	73.5°	73°	72.5°	72.5°
Chainstay lengthmm	405	405	405	405	408	408
Wheelbasemm	970	970	977	987	1005	1014
Front centermm	575	575	581	591	605	614
Bottom bracket dropmm	68	68	66	66	63	63
Bottom bracket heightmm	268	268	270	270	273	273
Fork rakemm	45	45	46	45	45	45
Trailmm	63	62	55	53	53	50
Stack/reach ratio	1.34	1.41	1.41	1.47	1.51	1.55

Not published by the manufacturer: Standover height, 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: Carbon
Fork material: Carbon
Weight limit: 110 kg

242.5 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 34
Largest chainring: 50
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 29.0 in
Highest gear: 131.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

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

29.0 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2026
Sample: 720 bicycles with this information
Coverage: 78.6% of the class

Highest gear

131.8 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2026
Sample: 720 bicycles with this information
Coverage: 78.6% of the class

Shifting

Mechanical

632 of 913 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2026
Sample: 913 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.1 km/h
Highest gear: 50.5 km/h

Total gear range 455%

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: 29.0–131.8 gear inches
Class reference (p10–p90): 27.4–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Race Model year: 2026
Lowest gear: 720 bicycles with this information, 78.6% of the class
Highest gear: 720 bicycles with this information, 78.6% 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 2026 builds

Differences across 2026 builds
Specification	This bicycle Ridley Helium Disc Shimano 105 2x12	Ridley Helium Disc Shimano 105 2x11sp	Ridley Helium Disc Shimano 105 Di2 2x12s	Ridley Helium Disc Shimano Ultegra 2x11sp	Ridley Helium Disc SRAM Rival AXS 2x12sp
Drivetrain
Smallest chainring	34	34	34	34	35
Largest chainring	50	50	50	50	48
Rear sprockets	12	11	12	11	12
Smallest sprocket	11	11	11	11	10
Largest sprocket	34	32	34	32	36
Lowest gear	29.0 in	30.8 in	29.0 in	30.8 in	28.2 in
Highest gear	131.8 in	131.8 in	131.8 in	131.8 in	139.2 in
Cockpit
Shifting	Mechanical	Mechanical	Electronic	Mechanical	Electronic
Other specifications
Wheel material	Aluminum	Aluminum	Aluminum	Carbon	Carbon