Radon Spire Disc 8.0

2021 RoadEndurance Manufacturer page

Radon Spire Disc 8.0, color Brightred / White

Price: Not published

Prices shown first for United States
Europe: €2,029 Last known price
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 11 34–50t / 11–34t
Gear range: 455%
Weight: 8.4 kg 18.5 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Not published by the manufacturer

Sizes and geometry

Components

15 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

SPIRE Carbon Disc Not identified

Suspension

1 part

Fork
- Radon

Drivetrain

5 parts

Cassette
- Shimano CS-HG700-11 11 speeds
CS-HG700-11CS-HG700
Chain
- Shimano CN-HG601
CN-HG601
Crankset
- Shimano 105 FC-R7000 11 speeds 50/34t
FC-R7000
Rear derailleur
- Shimano 105
FD-R7000
Shifters
- Shimano 105 ST-R7020
ST-R7020

Brakes

1 part

Brakes
- Shimano 105 BR-R7070
BR-R7070

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Grips
- Radon
Handlebar
- Newmen
Headset
- VP
Pedals

not included Not identified
Saddle
- Selle Italia
Seatpost
- Newmen
Stem
- Newmen

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Fork material: Carbon
Bicycle weight: 8.4 kg

18.5 lb
Weight limit: 115 kg

253.5 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 34
Largest chainring: 50
Rear sprockets: 11
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

Tire width: 28c
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 / Endurance Model year: 2021
Sample: 465 bicycles with this information
Coverage: 90.4% of the class

Highest gear

131.8 gear inches

This value is within the central range for this class.

Cohort: Road / Endurance Model year: 2021
Sample: 465 bicycles with this information
Coverage: 90.4% of the class

Shifting

Mechanical

130 of 513 bicycles with this information use electronic shifting.

Cohort: Road / Endurance Model year: 2021
Sample: 513 bicycles with this information
Coverage: 99.8% 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): 29.0–137.1 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Endurance Model year: 2021
Lowest gear: 465 bicycles with this information, 90.4% of the class
Highest gear: 465 bicycles with this information, 90.4% 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
Specification	This bicycle Radon Spire Disc 8.0	Radon Spire Disc 10.0	Radon Spire Disc 9.0
Frame
Bicycle weight	8.4 kg	7.8 kg	7.8 kg
Drivetrain
Smallest chainring	34	35	34
Largest chainring	50	48	50
Rear sprockets	11	12	11
Smallest sprocket	11	10	11
Largest sprocket	34	33	34
Lowest gear	29.0 in	30.8 in	29.0 in
Highest gear	131.8 in	139.2 in	131.8 in
Cockpit
Shifting	Mechanical	Electronic	Mechanical