Holdsworth Helm Titanium Shimano Ultegra Di2

Name: Holdsworth Helm Titanium Shimano Ultegra Di2
Brand: Holdsworth

2025 RoadRace Manufacturer page

Price: Not published

Prices shown first for United States
United Kingdom: £4,211 Last known price
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 36–52t / 11–34t
Gear range: 446%
Frame: Titanium
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

6 of 6 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.

Drivetrain

5 parts

Cassette
- Shimano Ultegra CS-R8100-12
CS-R8100-12CS-R8100
Crankset
- Shimano Ultegra FC-R8100 52/36t
FC-R8100
Front derailleur
- Shimano Ultegra FD-R8150 2 speeds
FD-R8150
Rear derailleur
- Shimano Ultegra RD-R8150 12 speeds
RD-R8150
Shifters
- Shimano Ultegra ST-R8170
ST-R8170BR-R8170

Brakes

1 part

Brakes
- Shimano Ultegra BR-R8170
BR-R8170ST-R8170

Sizes and geometry

5 sizes Open in the geometry plotter

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

Size MD

Table

Reach 379mm

Stack 543mm

Wheelbase 988mm

Head angle 72.0°

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 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	355	369	379	393	402
Stackmm	505	526	543	564	581
Top tube lengthmm	500	520	540	560	580
Seat tube lengthmm	485	515	535	555	575
Head tube lengthmm	100	120	140	160	180
Head tube angle	71.5°	72°	72°	72.5°	72.5°
Seat tube angle	74°	74°	73.5°	73.5°	73°
Chainstay lengthmm	415	415	415	415	415
Wheelbasemm	955	972	988	1004	1020
Front centermm	552	568	584	600	615
Bottom bracket dropmm	74	74	72	72	70
Bottom bracket heightmm	262	262	264	264	266
Fork rakemm	45	45	45	45	46
Trailmm	65	62	62	59	58
Stack/reach ratio	1.42	1.43	1.43	1.44	1.45

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: Titanium

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 36
Largest chainring: 52
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 30.7 in
Highest gear: 137.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Shifting: Electronic

Additional specifications

Tire clearance: Maximum tire width: 32c
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

30.7 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2025
Sample: 762 bicycles with this information
Coverage: 78.1% of the class

Highest gear

137.1 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2025
Sample: 762 bicycles with this information
Coverage: 78.1% of the class

Shifting

Electronic

643 of 969 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2025
Sample: 969 bicycles with this information
Coverage: 99.3% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.8 km/h
Highest gear: 52.5 km/h

Total gear range 446%

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: 30.7–137.1 gear inches
Class reference (p10–p90): 28.2–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Race Model year: 2025
Lowest gear: 762 bicycles with this information, 78.1% of the class
Highest gear: 762 bicycles with this information, 78.1% 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 Holdsworth Helm Titanium Shimano Ultegra Di2	Holdsworth Helm Titanium SRAM Rival AXS E1
Drivetrain
Smallest chainring	36	Not informed
Largest chainring	52	Not informed
Smallest sprocket	11	10
Largest sprocket	34	36
Lowest gear	30.7 in	Not informed
Highest gear	137.1 in	Not informed

Changes since 2024
Specification	2024 Holdsworth Helm Titanium Shimano Ultegra Di2	This bicycle Holdsworth Helm Titanium Shimano Ultegra Di2
Frame
Fork material	Carbon	Not informed
Cockpit
Seatpost	Rigid seatpost	Not informed
Other specifications
Bottom bracket standard	BSA	Not informed
Tire width	25c	Not informed
Wheel material	Aluminum	Not informed