Tire size for XS360

[76xs360]

I've got another question for you experts...sorry. The rear tire that's on my bike right now is a 3.50x18 which I think converts to a 100/90/18. The question is, since I can't seem to find this tire size in the tires I'm looking for (Bridgestone BT-45), will a 110/90/18 tire fit on my bike without any problems/mods? This size seems to be readily available on just about every site I've been on so I want to make sure this one would fit before buying them.

P.S. - any preferred sites to buy from? Cheapest prices?

Thanks again

 

[bcware]

I am running 110s in the rear on my 78 and I had to trim the chain guard. Fitment seems to vary by tire make and model. Essentially I split the chain guard down the middle length-wise; it looks unmodified though.

 

[76xs360]

Thanks bcware.

Anyone know specifically for my 76 XS360 if this would be the case? Otherwise I'll keep searching for the 100/90/18's

Thanks

 

[drewpy]

I got a BT45 110x90x18 and it fits no problem. Its a '78 xs400 which essentially the same as 360