Does anyone know what large size tyre i can fit onto an 18" front allow wheel on an xs 250 disc, The current tyre that i have on there is an Avon Roadrider 100/90 AV AM26 RRIDER 56V U,

I am trying to build a bobber but i want the fat front tyre look, Has anyone done this or know of what large size trye may fit ??

have a look at my blog (in the sig) I fitted some meaty tyres in there.

for a bobber the choice of tyre is firestones

if that is a standard ally wheel i would say you are about at the limit, fitting between the forks will be close at that , thet are only designed for 90/90/18 really