Dub Axle/Spider Interface Drawings

[cajer]

I’m looking to make custom crank arms and axle to interface with a Dub powermeter spider, but I can’t seem to find any drawings from SRAM of the interface. Does anyone know where to find one or does anyone have CAD they are willing to share?

[Dustin-The-Wind]

Hi there!

This was posted recently and should be of use:

SRAM 8-bolt chainring interface CAD

A while back I reverse-engineered the SRAM 8-bolt spline for their current generation cranks. The 3D printed test piece I made has a way better fit than SRAM’s own chainrings. Regardless, before I go ahead with ordering a custom 8-bolt 104 BCD spider for someone to use a Gates belt sprocket with SRAM’s T-type cranks, I figured I’d share it here and also invite others to upload their reverse-engineered interfaces for a sanity check. Here’s mine. SRAM 8-Bolt Interface.STEP (163.5 KB)