Centurion Backfire E R2600i

2021 MountainCross-country Electric bicycle Manufacturer page

Fork travel: 110 mm
Wheels: 29″
Drivetrain: 1 × 12 34t / 10–51t
Gear range: 510%
Battery: 625 Wh
Weight: 22.6 kg 49.8 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

XS
SM/MD
MD/LG
XL

The manufacturer did not publish rider heights for these sizes.

Components

24 of 25 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

Backfire R intube, Material: Aluminium 29" Steuerrohr: 1.5" straight Ausfallende: 12x148 mm Bremsaufnahme: Postmount 180 mm Not identified

Electric system

3 parts

Suspension

1 part

Fork
- RockShox 35 Gold RL

Drivetrain

6 parts

Cassette
- Shimano SLX CS-M7100-12 12 speeds 10–51t
CS-M7100-12
Chain
- Shimano Deore CN-M6100
CN-M6100CN-M6100-12
Chain guide
- Centurion
Crankset
- Centurion
Rear derailleur
- Shimano Deore XT RD-M8100 12 speeds
RD-M8100RD-M8100-12
Shifters
- Shimano Deore SL-M6100-IR 12 speeds
SL-M6100-IR

Brakes

2 parts

Wheels and tires

5 parts

Front hub
- Shimano SLX HB-M7110
HB-M7110HB-7110
Rear hub
- Shimano SLX FH-M7110 12 speeds
FH-M7110HB-7110
Rims
- Procraft
Spokes
- Procraft
Tires
- Maxxis Ardent

Cockpit and contact points

5 parts

Other components

2 parts

Sizes and geometry

4 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/MD

Table

Reach 435mm

Stack 648mm

Wheelbase 1173mm

Head angle 68.5°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	414	435	455	475
Stackmm	630	648	667	686
Top tube lengthmm	595	621	646	672
Seat tube lengthmm	400	450	500	550
Head tube lengthmm	100	120	140	160
Head tube angle	68.5°	68.5°	68.5°	68.5°
Seat tube angle	74°	74°	74°	74°
Chainstay lengthmm	460	460	460	460
Wheelbasemm	1145	1173	1200	1228
Front centermm	693	721	748	776
Bottom bracket dropmm	68	68	68	68
Bottom bracket heightmm	306	306	306	306
Standover heightmm	762	793	827	863
Fork rakemm	51	51	50	51
Trailmm	93	93	94	93
Stack/reach ratio	1.52	1.49	1.47	1.44

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
Bicycle weight: 22.6 kg

49.8 lb
Weight limit: 150 kg

330.7 lb

Suspension

Suspension configuration: Hardtail
Front travel: 110 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 19.3 in
Highest gear: 98.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Electric system

Battery capacity: 625 Wh

Additional specifications

Battery: BOSCH PowerTube 625 Wh
Fork spring: Air
Tire width: 2.4″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

4 measures

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

Front travel

110 mm

This value is above the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,256 bicycles with this information
Coverage: 91.6% of the class

Lowest gear

19.3 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,101 bicycles with this information
Coverage: 80.3% of the class

Highest gear

98.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,101 bicycles with this information
Coverage: 80.3% of the class

Shifting

Mechanical

89 of 1,368 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,368 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.4 km/h
Highest gear: 37.8 km/h

Total gear range 510%

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: 19.3–98.6 gear inches
Class reference (p10–p90): 17.4–100.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2021
Lowest gear: 1101 bicycles with this information, 80.3% of the class
Highest gear: 1101 bicycles with this information, 80.3% 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
Specification	This bicycle Centurion Backfire E R2600i	Centurion Backfire Fit E R760i	Centurion Backfire Fit E R811i EQ	Centurion Backfire Fit E R850i	Centurion Backfire Fit E R850i EQ
Frame
Bicycle weight	22.6 kg	22.2 kg	26.4 kg	21.3 kg	22.8 kg
Suspension
Front travel	110 mm	100 mm	100 mm	100 mm	100 mm
Drivetrain
Smallest chainring	34	36	34	34	34
Largest chainring	34	36	34	34	34
Rear sprockets	12	10	12	12	12
Smallest sprocket	10	11	11	11	11
Largest sprocket	51	42	50	50	50
Lowest gear	19.3 in	24.9 in	19.7 in	19.7 in	19.7 in
Highest gear	98.6 in	94.9 in	89.6 in	89.6 in	89.6 in
Cockpit
Seatpost	Dropper seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost
Electric bicycle systems
Battery capacity	625 Wh	625 Wh	625 Wh	500 Wh	500 Wh
Other specifications
Tire width	2.4″	2.25″	2.25″	2.25″	2.25″
Wheel size	29″	29″	29″	27.5″ / 29″	27.5″ / 29″

Changes since 2020
Specification	2020 Centurion Backfire E R2600i	This bicycle Centurion Backfire E R2600i
Frame
Frame material	Not informed	Aluminum
Suspension
Front travel	Not informed	110 mm
Other specifications
Battery	Capacity: 625 WhBosch PowerTube 625Wh	Capacity: 625 WhBOSCH PowerTube 625 Wh
Tire width	Not informed	2.4″