Allied Allroad Ultegra R8100 Di2

Name: Allied Allroad Ultegra R8100 Di2
Brand: Allied

2021 RoadGravel Manufacturer page

Last known price: $8,475

Prices shown first for United States
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

13 of 14 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

7 parts

Brakes

1 part

Brakes
- Shimano Ultegra
BR-R9170

Wheels and tires

2 parts

Cockpit and contact points

4 parts

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 387mm

Stack 550mm

Wheelbase 988mm

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	372	381	387	394	402	409
Stackmm	515	530	550	570	595	620
Top tube lengthmm	494.5	517	537.5	550.5	564	580
Seat tube lengthmm	460	510	530	550	570	600
Head tube lengthmm	107	123	140	161	188	214
Head tube angle	72°	72°	73°	73°	73°	73°
Seat tube angle	74.5°	74.5°	73.5°	73.5°	73.5°	73.5°
Chainstay lengthmm	415	415	415	415	415	415
Wheelbasemm	971	985	988	1001	1017	1032
Front centermm	562	576	580	593	609	624
Bottom bracket dropmm	77.5	77.5	77.5	77.5	77.5	77.5
Bottom bracket heightmm	271	271	271	271	271	271
Standover heightmm	722	736	769	804	825	846
Fork rakemm	47	47	47	47	47	47
Trailmm	64	64	58	58	58	58
Stack/reach ratio	1.38	1.39	1.42	1.45	1.48	1.52

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: Carbon
Fork material: Carbon

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: Electronic

Additional specifications

Bottom bracket standard: BSA
Tire clearance: Maximum tire width: 40c; Additional specification: Wheel kind: 700, Maximum tire width: 50c; Additional specification: Wheel kind: 27.5
Tire width: 40c
Wheel material: Carbon
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 / Gravel Model year: 2021
Sample: 668 bicycles with this information
Coverage: 86.3% of the class

Highest gear

131.8 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2021
Sample: 668 bicycles with this information
Coverage: 86.3% of the class

Shifting

Electronic

144 of 774 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2021
Sample: 774 bicycles with this information
Coverage: 100.0% 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): 24.2–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2021
Lowest gear: 668 bicycles with this information, 86.3% of the class
Highest gear: 668 bicycles with this information, 86.3% 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 2021 builds

Differences across 2021 builds
Specification	This bicycle Allied Allroad Ultegra R8100 Di2	Allied Allroad Dura-Ace R9200 Di2	Allied Allroad Force AXS	Allied Allroad Red AXS	Allied Allroad Rival AXS
Drivetrain
Smallest chainring	34	34	Not informed	Not informed	33
Largest chainring	50	50	Not informed	Not informed	46
Smallest sprocket	11	11	10	10	10
Largest sprocket	34	34	33	33	36
Lowest gear	29.0 in	29.0 in	Not informed	Not informed	26.6 in
Highest gear	131.8 in	131.8 in	Not informed	Not informed	133.4 in
Other specifications
Tire clearance	Maximum tire width: 40c; Additional specification: Wheel kind: 700, Maximum tire width: 50c; Additional specification: Wheel kind: 27.5	Maximum tire width: 40c; Additional specification: Wheel kind: 700	Maximum tire width: 40c; Additional specification: Wheel kind: 700	Maximum tire width: 40c; Additional specification: Wheel kind: 700	Maximum tire width: 40c; Additional specification: Wheel kind: 700
Tire width	40c	30c	40c	30c	40c
Wheel material	Carbon	Carbon	Carbon	Carbon	Aluminum
Power meter	Not informed	Not informed	SRAM Force AXS D1Additional specification: Model display: Force AXSAdditional specification: Model id: force-axs	Not informed	Not informed