tyre size

[blair]

does anyone know about tyre sizes ?

i have a spoked rear wheel with a 120 / 90 /17 tyre and was wondering if i could fit a 130 /90 /17  or wider if poss ?

its only 10 mm extra and it if i can it mean i could use the same tyre that i used on my z550 chop , theres no limit on width as i havent built the frame yet but i dont know what the maximum tyre width would be

any ideas ?

cheers

[tbone]

any idea what size the wheel is? apart from the diameter of course


maybe this will help
http://www.steelthundercc.com/tiresizes.html

[blair]

thanks tbone , no i would be able to measure it once i have the tyre off but untill then just the tyre dimms , thanks for the link but its not working , i will try again later

[toad]

your wheel should have the rim size stamped into it

[blair]

good piont toad , i will go and check

[tbone]

a 120/90/17 will fit on rims 2.50 - 3.00 with an overall width of 119
a 130/90/17 will fit on rims 2.50 - 3.50 """""""""""""""""""""""""""" of 129

Taken from the Avon tyres website Roadrider tyre data sheet

and at last i found that link........http://www.avon-tyres.co.uk/motorcycle/content/en/pdf/roadrider.pdf

[blair]

thanks tbone , had a look at the rim and theres no stampings on it so i ll measure it once the tyre is off

[retro900]

120 / 90 /17

17 is the wheel diameter.
120 is the tyre width
90 is the aspect ratio (90% of the 120 width) thats the depth of the tyre from centre of tread to rim (not sure if measured as a staright line or the contour of the tyre).

[manfred]

It's straight line.