Centurion Backfire Fit E R811i DualBatt

2020 MountainCross-country Electric bicycle Manufacturer page

Wheels: 29″
Drivetrain: 1 × 12 34t / 11–50t
Gear range: 455%
Battery: 625 Wh
Weight: 24.9 kg 54.9 lb · Reference configuration not specified
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

19 of 22 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 Fit R intube Not identified

Electric system

2 parts

Suspension

1 part

Fork
- SR Suntour RAIDON34

Drivetrain

5 parts

Brakes

2 parts

Wheels and tires

5 parts

Front hub
- Shimano Deore HB-M6010-B
HB-M6010FH-M6010
Rear hub
- Shimano Deore FH-M6010-B
FH-M6010HB-M6010
Rims
- Procraft
Spokes

Stainless 2.0 Not identified
Tires
- Schwalbe Smart Sam

Cockpit and contact points

5 parts

Handlebar
- Procraft
Pedals

VPE-992A Not identified

VPE-992A
Saddle
- Procraft
Seatpost
- Procraft
Stem
- Procraft

Other components

1 part

Lights
- Lezyne

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 410mm

Stack 665mm

Wheelbase 1129mm

Head angle 70.0°

Seat angle 73.5°

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 Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	390	410	430	450
Stackmm	645	665	685	705
Top tube lengthmm	581	607	633	659
Seat tube lengthmm	430	480	530	580
Head tube lengthmm	110	130	150	170
Head tube angle	69.75°	70°	70.25°	70.5°
Seat tube angle	73.5°	73.5°	73.5°	73.5°
Chainstay lengthmm	460	460	460	460
Wheelbasemm	1105	1129	1153	1177
Front centermm	654	677	701	725
Bottom bracket dropmm	68	68	68	68
Bottom bracket heightmm	306	306	306	306
Standover heightmm	756	782	809	840
Fork rakemm	44	44	44	44
Trailmm	91	89	88	86
Stack/reach ratio	1.65	1.62	1.59	1.57

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
Bicycle weight: 24.9 kg

54.9 lb
Weight limit: 150 kg

330.7 lb

Suspension

Suspension configuration: Hardtail

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 19.7 in
Highest gear: 89.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Electric system

Battery capacity: 625 Wh

Additional specifications

Battery: Bosch PowerTube 625Wh
Fork spring: Air
Tire width: 57c
Travel: Front: Additional specification: Not available: No
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

3 measures

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

Lowest gear

19.7 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2020
Sample: 1,057 bicycles with this information
Coverage: 83.8% of the class

Highest gear

89.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2020
Sample: 1,057 bicycles with this information
Coverage: 83.8% of the class

Shifting

Mechanical

57 of 1,261 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2020
Sample: 1,261 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.6 km/h
Highest gear: 34.3 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: 19.7–89.6 gear inches
Class reference (p10–p90): 17.4–105.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2020
Lowest gear: 1057 bicycles with this information, 83.8% of the class
Highest gear: 1057 bicycles with this information, 83.8% 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 2020 builds

Differences across 2020 builds
Specification	This bicycle Centurion Backfire Fit E R811i DualBatt	Centurion Backfire E R2600i	Centurion Backfire Fit E R760i / 750i	Centurion Backfire Fit E R811i DualBatt EQ
Frame
Bicycle weight	24.9 kg	22.6 kg	21.6 kg	26.4 kg
Drivetrain
Smallest chainring	34	34	36	34
Largest chainring	34	34	36	34
Rear sprockets	12	12	10	12
Smallest sprocket	11	10	11	11
Largest sprocket	50	51	42	50
Lowest gear	19.7 in	19.3 in	24.9 in	19.7 in
Highest gear	89.6 in	98.6 in	94.9 in	89.6 in
Cockpit
Seatpost	Rigid seatpost	Dropper seatpost	Rigid seatpost	Rigid seatpost
Other specifications
Battery	Capacity: 625 WhBosch PowerTube 625Wh	Capacity: 625 WhBosch PowerTube 625Wh	Capacity: 625 WhBosch PowerTube 625Wh [S-XL] / 500Wh [XS-XL]	Capacity: 625 WhBosch PowerTube 625Wh
Fork spring	Air	Air	Not informed	Air
Tire width	57c	Not informed	Not informed	57c
Wheel size	29″	29″	27.5″ / 29″	29″