Centurion E-Fire City R850

2020 UrbanCommuter Electric bicycle Manufacturer page

Wheels: 26″, 700c
Drivetrain: 1 × 10 40t / 11–36t
Gear range: 327%
Battery: 500 Wh
Weight: 24.1 kg 53.1 lb · Reference configuration not specified
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 151–164
SM 159–170
SM 159–170
MD 165–177
LG 171–184

Components

23 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

E-Fire City R G2 Not identified

Electric system

2 parts

Suspension

1 part

Fork
- SR Suntour NEX

Drivetrain

6 parts

Cassette
- Shimano CS-HG50-10 10 speeds 11–36t
CS-HG50-10
Chain
- KMC
Chain guide
- Curana
Crankset
- Centurion
Rear derailleur
- Shimano Deore RD-M6000-SGS 10 speeds
RD-M6000-SGS
Shifters
- Shimano Deore SL-M6000-R 10 speeds
SL-M6000

Brakes

2 parts

Brake levers
- Tektro HD-T285
HD-T285
Brakes
- Tektro HD-T285
HD-T285

Wheels and tires

5 parts

Front hub
- Shimano Deore HB-M6000
HB-M6000FH-M4050
Rear hub
- Shimano FH-M4050
FH-M4050HB-M6000
Rims
- Procraft
Spokes

Stainless 2.0 Not identified
Tires
- Schwalbe

Cockpit and contact points

5 parts

Other components

3 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size SM

Table

Reach 388mm

Stack 643mm

Wheelbase 1107mm

Head angle 69.6°

Seat angle 72.6°

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 Reported by the manufacturer

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	382	394	388	399	411
Stackmm	603	621	643	662	680
Top tube lengthmm	566	584	589	606	624
Seat tube lengthmm	380	430	430	480	530
Head tube lengthmm	180	200	160	180	200
Head tube angle	68.5°	68.5°	69.6°	69.6°	69.6°
Seat tube angle	73°	73°	72.6°	72.6°	72.6°
Chainstay lengthmm	440	440	465	465	465
Wheelbasemm	1087	1107	1107	1125	1144
Front centermm	649	669	650	668	687
Bottom bracket dropmm	35	35	67	67	67
Standover heightmm	417	417	418	418	418
Fork rakemm	40	41	42	42	42
Trailmm	82	81	85	85	85
Stack/reach ratio	1.58	1.58	1.66	1.66	1.66

Not published by the manufacturer: Bottom bracket 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
Bicycle weight: 24.1 kg

53.1 lb
Weight limit: 150 kg

330.7 lb

Suspension

Suspension configuration: Hardtail

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 40
Largest chainring: 40
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 32.2 in
Highest gear: 105.5 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Electric system

Battery capacity: 500 Wh

Additional specifications

Battery: Bosch PowerPack 500Wh
Fork spring: Coil
Travel: Front: Additional specification: Not available: No
Wheel material: Aluminum
Wheel size: 26″, 700c

Gearing

Estimated speeds at 80 rpm

Lowest gear: 12.3 km/h
Highest gear: 40.4 km/h

Total gear range 327%

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: 32.2–105.5 gear inches

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 E-Fire City R850	Centurion E-Fire City F750	Centurion E-Fire City F950	Centurion E-Fire City R2600i / 2500i	Centurion E-Fire City R2600i / 2500i ABS	Centurion E-Fire City R550
Frame
Bicycle weight	24.1 kg	25.3 kg	25.9 kg	24.4 kg	25.3 kg	23.9 kg
Drivetrain
Smallest chainring	40	38	38	40	40	42
Largest chainring	40	38	38	40	40	42
Rear sprockets	10	9	1	11	11	9
Smallest sprocket	11	11	18	11	11	11
Largest sprocket	36	36	18	42	42	36
Lowest gear	32.2 in	30.6 in	61.2 in	27.6 in	27.6 in	33.8 in
Highest gear	105.5 in	100.2 in	61.2 in	105.5 in	105.5 in	110.7 in
Cockpit
Shifting	Mechanical	Mechanical	No shifting	Mechanical	Mechanical	Mechanical
Electric bicycle systems
Battery capacity	500 Wh	500 Wh	500 Wh	625 Wh	625 Wh	500 Wh
Other specifications
Fork spring	Coil	Coil	Coil	Air	Air	Coil
Wheel size	26″ / 700c	700c	700c	650b / 700c	650b / 700c	26″ / 700c