Swingarm width

[Seanpd]

Hey y'all, I'm working on a project bike and I am going to run a 150/70 17 rear tire on it on a 4.25 rim and I need to know how wide the swingarm should I be at the axle so I can build one accordingly. Any help is appreciated. Sean


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[o1marc]

Stop before you hurt yourself. What bike is it going on? The swing arm width is not as critical as stuff like chain and chain guard clearance. Are you building a bike starting with the rear wheel first, and then building around that? The rim and tire are just a couple of the measurements you need. Width of the brakes and sprockets after mounted.

 

[Seanpd]

O1marc, hurting myself is the last thing I want to do. The frame is going to be a custom build by me. I haven't sourced a rear wheel & hub yet so now I will work on that and then worry about the swingarm. I built my current bike from the ground up, including the frame. It's time for a bike that doesn't require a 10 acre field to turn because the forks are so long. Sean



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[my-79-750-k]

I don't know the actual width, but I can tell you from experience, a 150 wide tire will fit in a stock CB750 swingarm... a 160 probably won't.