Ok I have tried the search engine and can't seem to get a straight answer so I will put it out there.

I want to put a Avon cobra on the back. So can someone tell  me if the 200 will fit straight on the fatbob?

C'mon someone must have put these fuckers on.

chriso I do not think there is enough room, there is very little space between stock tyre and the belt. I wanted to put a 200 on when they did the new wheels and they point blank said no chance

Cheers mate, I do know the Avon 200s actually measure about 190, don't know if that will be enough though

chriso there was a discussion about this on the US HD forum. I'll try and find a link later, but basically your right - because the avon was closer to 190 it fit where a proper 200 (metzeler I think they mentioned) didn't.
Well, thats what the yanks reckoned anyways....

Good on ya stumbly, cheers I will have a look to

Ok got the info i needed (cheers Mark) Avon cobras will go straight on. 150 on the front and 200 on the back. cheers