Centurion E-Fire City R850

2025 UrbanCommuter Electric bicycle Manufacturer page

Fork travel: 63 mm
Wheels: 26″, 700c
Drivetrain: 1 × 10 38t / 11–48t
Gear range: 436%
Battery: 500 Wh
Weight: 24 kg 52.9 lb · Reference configuration not specified
Frame: Aluminum
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

27 of 28 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, Material: Aluminium, Steuerrohr: 1.5" tapered, Ausfallende: 10x135mm, Bremsaufnahme: Postmount 180mm, Rahmenkennung: 26": CBP031A, 28": ABP029A Not identified

Electric system

3 parts

Suspension

1 part

Fork
- SR Suntour NEX
NEX-E25

Drivetrain

6 parts

Cassette
- Shimano CS-LG400-10 10 speeds 11–48t
CS-LG400-10
Chain
- Shimano CN-LG500
CN-LG500
Chain guide
- Curana
Crankset
- Centurion
Rear derailleur
- Shimano Cues RD-U6000 11 speeds
RD-U6000
Shifters
- Shimano Cues
RD-U6000

Brakes

2 parts

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

Wheels and tires

5 parts

Front hub
- Shimano HB-QC400
HB-QC400FH-QC400
Rear hub
- Shimano FH-QC400 11 speeds
FH-QC400HB-QC400
Rims
- Procraft
Spokes
- Procraft
Tires
- Schwalbe

Cockpit and contact points

5 parts

Other components

5 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size SM

Table

Geometry diagram unavailable

The drawing needs reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
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

Not published by the manufacturer: Reach, Stack, Bottom bracket height, Fork rake, Trail, Stack/reach ratio, 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: 24 kg

52.9 lb
Weight limit: 150 kg

330.7 lb

Suspension

Suspension configuration: Hardtail
Front travel: 63 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 38
Largest chainring: 38
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 48
Lowest gear: 23.0 in
Highest gear: 100.2 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
Tire width: 2″
Wheel material: Aluminum
Wheel size: 26″, 700c

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.8 km/h
Highest gear: 38.4 km/h

Total gear range 436%

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: 23.0–100.2 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 2025 builds
Specification	This bicycle Centurion E-Fire City R850	Centurion E-Fire City R2600i/R2500i	Centurion E-Fire City R2600i/R2500i SMC	Centurion E-Fire City R550	Centurion E-Fire City R650	Centurion E-Fire City R650 Coaster
Frame
Bicycle weight	24 kg	24.4 kg	24.4 kg	25.1 kg	24.8 kg	25.2 kg
Drivetrain
Smallest chainring	38	40	40	38	38	38
Largest chainring	38	40	40	38	38	38
Rear sprockets	10	11	11	9	Not informed	Not informed
Smallest sprocket	11	11	11	11	Not informed	Not informed
Largest sprocket	48	42	42	46	Not informed	Not informed
Lowest gear	23.0 in	27.6 in	27.6 in	24.0 in	Not informed	Not informed
Highest gear	100.2 in	105.5 in	105.5 in	100.2 in	Not informed	Not informed
Drivetrain technologies	Not informed	Not informed	Not informed	Not informed	internally-geared-hub	internally-geared-hub
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Coaster brake
Other specifications
Battery	Capacity: 500 WhBOSCH PowerPack 500Wh	Capacity: 500 WhBosch PowerTube 500 Wh (XS), 625 Wh (S, M, L)	Capacity: 500 WhBosch PowerTube 500 Wh (XS), 625 Wh (S, M, L)	Capacity: 500 WhBOSCH PowerPack 500Wh	Capacity: 500 WhBOSCH PowerPack 500Wh	Capacity: 500 WhBOSCH PowerPack 500Wh
Fork spring	Coil	Air	Air	Coil	Coil	Coil
Wheel size	26″ / 700c	650b / 700c	650b / 700c	26″ / 700c	26″ / 700c	26″ / 700c