Speedline Parts | 4 Bolt Spline Drive BMX Spider
$ 24.95$ 59.95
The Speedline Spline Drive 4 bolt spider to work with all 19mmx48 spline BMX cranks, such as Profile, Madera and Supercross.
It is a Billet , CNC Machined, Aluminum 4 bolt 104 BCD spider with a Heat Treated 4130 Cro-mo center spline insert to allow it to slide right on to your 48t spline cranks for the most positive engagement for your drive gear.
Available in a wide array of colors to help you customize the look of your bike to your style.
Only 74 grams.
Race calendar
Never miss a USABMX national
Add the 2026 USABMX national race schedule to your calendar with one click. Built by Supercross BMX so racers, parents, and fans can keep every national weekend in one place.
Dates are based on the official USABMX national schedule and may be updated if changes are announced. This calendar is a fan/racer convenience tool from Supercross BMX and is not an official USABMX calendar.