Giant GFR C/B

2021 BMX Manufacturer page

Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 1 33t / 14t
Gear range: 100%
Frame: Aluminum
Brakes: Coaster brake

Rider height by size (cm)

Size guide

One Size 120+

Components

5 of 18 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

ALUXX grade aluminium Not identified

Suspension

2 parts

Fork

Chromoly Steerer, high-tensile legs Not identified
Rear shock

None

Drivetrain

7 parts

Bottom bracket

Loose ball Not identified
Cassette

14T Not identified
Chain
- KMC
Crankset

Steel 1-piece, 33T Not identified
Front derailleur

None
Rear derailleur

None
Shifters

None

Brakes

2 parts

Brake levers
- Tektro
Brakes

Fr: Calliper, Rr: Coaster Not identified

Wheels and tires

5 parts

Front hub

Coaster, nutted, 36H Not identified
Rear hub

Coaster, nutted, 36H Not identified
Rims

Alloy Not identified
Spokes

Steel, 14g Not identified
Tires
- Kenda

Cockpit and contact points

5 parts

Handlebar

Steel Not identified
Pedals
- Giant
Saddle

Ultralight Not identified
Seatpost

Steel Not identified
Stem
- Giant

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size One Size

Table

Reach 354mm

Stack 387mm

Wheelbase 895mm

Head angle 70.6°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 20″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	354
Stackmm	387
Top tube lengthmm	465
Seat tube lengthmm	240
Head tube lengthmm	90
Head tube angle	70.6°
Seat tube angle	74°
Chainstay lengthmm	370
Wheelbasemm	895
Front centermm	525
Bottom bracket dropmm	2
Standover heightmm	485
Fork rakemm	33
Trailmm	85.5
Stack/reach ratio	1.09
Suspension and parts
Crank lengthmm	127
Stem lengthmm	52

Not published by the manufacturer: Bottom bracket height, Front travel, Rear travel, Handlebar width, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 33
Largest chainring: 33
Rear sprockets: 1
Smallest sprocket: 14
Largest sprocket: 14
Lowest gear: 47.1 in
Highest gear: 47.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Coaster brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: No shifting

Additional specifications

Tire width: 2.125″
Wheel material: Aluminum
Wheel size: 20″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 18.1 km/h
Highest gear: 18.1 km/h

Total gear range 100%

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.