Centurion Backfire Fit Comp 50 EQ

2025 MountainCross-country Manufacturer page

Fork travel: 100 mm
Wheels: 27.5″, 29″
Drivetrain: 2 × 8 22–36t / 11–34t
Gear range: 506%
Weight: 16.8 kg 37.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XXS 145–159
XS 157–168
SM 165–176
SM 165–176
MD 174–183

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 Fit Comp, Material: Aluminium, Steuerrohr: 1 1/8" straight, Ausfallende: 10x135mm, Bremsaufnahme: IS/Postmount Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

7 parts

Bottom bracket
- FSA
BB-7420ST
Cassette
- Shimano CS-HG31 8 speeds 11–34t
CS-HG31
Chain
- KMC Z8.3 8 speeds
Crankset
- Shimano Altus FC-M315-2 8 speeds 22t
FC-M315
Front derailleur
- Shimano Altus FD-M315-TS 2 speeds
FD-M315-TSFD-M315
Rear derailleur
- Shimano Acera RD-M3020-8 8 speeds
RD-M3020
Shifters
- Shimano Acera
RD-M3020

Brakes

2 parts

Wheels and tires

5 parts

Front hub
- Shimano DH-3D32-QR
DH-3D32-QRFH-TX506
Rear hub
- Shimano FH-TX506 11 speeds
FH-TX506DH-3D32-QR
Rims
- Procraft
Spokes
- Procraft
Tires
- Kenda Small Block Eight

Cockpit and contact points

5 parts

Other components

4 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	545	562	579	579	595
Seat tube lengthmm	330	380	430	430	480
Head tube lengthmm	100	120	140	100	120
Head tube angle	69°	69°	69°	69.5°	69.5°
Seat tube angle	73°	73°	73°	73°	73°
Chainstay lengthmm	430	430	430	440	440
Wheelbasemm	1047	1066	1084	1083	1101
Front centermm	621	640	658	651	669
Bottom bracket dropmm	45	45	45	63	63
Bottom bracket heightmm	310	310	310	311	311
Standover heightmm	677	689	725	712	743

Not published by the manufacturer: Reach, Stack, 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: 16.8 kg

37.0 lb
Weight limit: 135 kg

297.6 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 22
Largest chainring: 36
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 18.8 in
Highest gear: 94.9 in

Wheels and brakes

Wheel configuration: Wheel options
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Tire width: 2.1″
Wheel material: Aluminum
Wheel size: 27.5″, 29″

Technical analysis

2 measures

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

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2025
Sample: 1,508 bicycles with this information
Coverage: 87.8% of the class

Shifting

Mechanical

222 of 1,648 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2025
Sample: 1,648 bicycles with this information
Coverage: 95.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.2 km/h
Highest gear: 36.4 km/h

Total gear range 506%

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: 18.8–94.9 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 Backfire Fit Comp 50 EQ	Centurion Backfire Carbon 2000	Centurion Backfire Carbon 3000	Centurion Backfire Comp 50	Centurion Backfire Comp 50 EQ	Centurion Backfire Fit Comp 50
Frame
Frame material	Aluminum	Carbon	Carbon	Aluminum	Aluminum	Aluminum
Bicycle weight	16.8 kg	10.1 kg	9.6 kg	14.3 kg	16.9 kg	14.3 kg
Weight limit	135 kg	135 kg	110 kg	135 kg	135 kg	135 kg
Drivetrain
Front chainrings	2	1	1	2	2	2
Smallest chainring	22	32	32	22	22	22
Largest chainring	36	32	32	36	36	36
Rear sprockets	8	12	12	8	8	8
Smallest sprocket	11	10	10	11	11	11
Largest sprocket	34	51	52	34	34	34
Lowest gear	18.8 in	18.2 in	17.9 in	18.8 in	18.8 in	18.8 in
Highest gear	94.9 in	92.8 in	92.8 in	94.9 in	94.9 in	94.9 in
Wheels
Wheel configuration	Wheel options	Same size	Same size	Wheel options	Wheel options	Wheel options
Other specifications
Fork spring	Coil	Not informed	Not informed	Coil	Coil	Coil
Tire width	2.1″	2.2″	2.2″	2.1″	2.1″	2.1″
Wheel size	27.5″ / 29″	29″	29″	27.5″ / 29″	27.5″ / 29″	27.5″ / 29″
Bottom bracket standard	Not informed	BB86/BB92	BB86/BB92	Not informed	Not informed	Not informed