Rear drum sizes

Chat about choppers here. Any posts considered by forum administrators to be used by businesses as unpaid advertising will be promptly removed...

Moderator: Prof

Rear drum sizes

Postby steve » Mon Sep 11, 2017 4:38 pm

Hello all

I have a Sportster iron head rear hub and I am wanting a smaller drum and and less teeth on the rear sprocket.
I think I heard once that a Triumph pre unit drum will bolt up to a Sportster hub. Apparently these are a 7 inch drum and the sprocket will bolt on.
Has anyone done this?
If not does anyone have a Triumph 7 inch drum witha bolt on sprocket sitting around that you can take some measurements from.
I need the center hole size and the PCD of the eight mounting holes.

Any other suggestions for a smaller drum on a Sportster hub would be appreciated.


Posts: 54
Joined: Fri May 05, 2006 1:55 pm
Location: Ipswich

Return to Chopper Chat (includes how to post photos)

Who is online

Users browsing this forum: No registered users and 3 guests