As the title says..... I'm currently running a (new) 140mm rear on my 1994 Fatboy. It's fine as it is, but I'm also interested in a fatter look.

Just so we're clear, I'm NOT interested at all in a wide tire conversion kit, replacing the swingarm, 300mm tire, or anything like that.

What's the fattest tire my stock rim can SAFELY take with no rubbing or other issues?

 

if you know your rim width go to avonmoto or others for correct tyre fitments + specs then measure how much room you have everywhere!!!

 

Thanks. I'll check that out.

 

I think a 140 may be about it. I have a 98 custom, same frame. Without converting to a thinner belt or chain the 140 mu is the biggest I could stuff in there without clearance issues. Maybe you could sneak a 150 mu, but I think it would rub the belt.

 

Thanks. That's what I was looking for.

Not a big deal either way.

 

Yup, I'm also running a 140 (1996 Fatboy) in the Michelin Commander II. There's just enough clearance between it and my drive belt.

 

I think a 150 will be the max the stock wheel can hold...you would probably need a pulley spacer to gain belt clearance. I put a 170 under my 94 but I put a skinny belt on it an used a deuce wheel.

 

That'd what I almost bought, a Commander II. But since I was replacing only the rear because it got punctured, I saved a few bucks by getting a Dunlop. I also did this because the front was a Dunlop, not that it really matters.

But when it's time to replace them both, it'll probably be the Commander II.

 

A bit of a re-post of some info I posted into another thread but relevant here:

When I got my '96 Fatboy earlier this year I changed the tyres out to the Michelin Commander II's and have no complaints, great tyre. I went slightly wider on the rear 130 -> 140 because my Indy said the Michelin rep told him the 140 has a slightly different profile that handled better than the 130's. I don't know if that's true or not because I haven't seen them side by side, but I took his advice because I didn't have any prior experience with the MC II's and have been happy with the handling and look of them.

 

I managed to stuff a Dunlop 404 150mm rear tire on my 1994 Fatboy and have .010" clearance between the edge of my tire and the drive belt.

No rubbing on anything...