The Profile Spider Spline Drive BMX 4 Bolt works with most 3-pc chromoly cranks and 48 splined 19mm spindles (made with offset for outboard bottom bracket - Profile). Allows you to use 4-Bolt chainrings, with the 104mm bolt pattern for 4-bolt chainrings.
 
Spline-Drive Spiders slide directly onto 48 splined 19mm spindles and do not require a gear bolt to attach to crank arm.
 

-Machined from billet aluminum plate.

-Supplied with a CrMo Steel adapter insert already pressed in.

Avilable in 19mm or 22mm option

Weight:
4-Bolt: 74g/2.6oz

-Machined from billet aluminum plate.

-Supplied with a CrMo Steel adapter insert already pressed in.

Avilable in 19mm or 22mm option

Weight:
4-Bolt: 74g/2.6oz