BMXRACKBMX frame sizing
Keep the model measurement separate from a rider size recommendation.
Compare the maker geometry
Kink publishes these Feral top tube options: 20.5, 20.75, 21, 21.25, and 21.5 inches.
The Feral geometry also lists a 74.5-degree head tube angle and a 13.5 to 13.75-inch chainstay range.
Source: Kink Feral Frame. Read 2026-11-15.
Read the brand chart
Use the chart from the brand of the bike you choose. Do not apply one brand’s chart to every frame.
Source: Fit Bike Co. height chart. Read 2026-11-15.
Read the published Fit Bike Co. height ranges.
Browse frames ↗Questions before you order
Is top tube length a rider height chart?
No. The model geometry gives a measurement. Use the brand height chart for its published size guidance.