Tyre sizes, what can i run?

[Greasey Fingers]

Yes another boring tyre size thread Sorry for being so boring. I have been reading different threads but i really would like a 'final word' on what can and cant be run.

I guess my question is simple.

Firstly, what are the factory tyre recommendations for a 1979 XS250/400

Is it front 90/90-18 and rear 110/90-18?

Secondly, whats the fattest on the back without mods? 120 or 130?

Sorry for flogging the dead horse But i just want to be sure what to order cause i want whitewalls maybe.

 

[Sandrew]

I run 100/90 front, and could fit 110 without problems. In the rear I have 18" and 120/90, 130 on mine is gonna hit the chain. Not sure about 16 inch, tho. (Seen someone usin 130 on 16incher)

 

[Greasey Fingers]

Ah cool thanks for the heads up sandrew, what year is your bike? So you can go a bit wider on the front and 120 on the back. Atm mine has a 120 on the back but damn it looks skinny?!? Maybe thats because its a really old school tyre.

How does running a slightly wider tyre on the front effect handling? Oh yeah my mag wheels are 18" too.

 

[drewpy]

you'll find it harder to turn the bike. I stick with the standard tyre sizes on my resto bike, but the tracker has over size and is harder to steer but I have wider handlebars.

 

[Pork Chop]

This should fit.

Posted via Mobile

 

[drewpy]

seen them before, do they drag race over mud?

 

[Greasey Fingers]

This should fit.

Posted via Mobile

hmmmm ....i reckon a couple of washers on either side of the axle and i can just about squeeze that bad boy straight in

 

[Pork Chop]

I have a Dunlop GP on the rear that is 4.0 x 18. I like the classic tread pattern & the width suits the style I am looking for.