This is a discussion on smaller 17" wheels vs 18" within the Vintage Motorcycle Racing forums, part of the Caferacer.net Forums category; .................
Last edited by dirkchecken; 07-09-2015 at 04:57 PM.
I like my shocks like I like my women. Cheap and Chinese.
I know its minor but the foot print of the tire would be slightly smaller as the circumference is less..its possible that the less grab it has could be made up with a change in tire compound or design if that size is more readily available...
Last edited by Tonnystark; 11-11-2014 at 09:59 PM.
you'll have trouble finding vintage rubber in 17"
not sure if rain slicks are legal.... but that would be your only option
Avon, Dunlop and Continental do classic style race tyres in 17. However profiles tend to be lowish so will slow your steering up a bit. Remember that 17 inch tyres have smaller rolling radius than 18's or rather; generally 1 rotation of an 18 inch wheel will have you further down the track compared to a 17 so you will need to alter your gearing therefore. You also will loose ground clearance.
No idea what the race regs are where you are but I would check eligibility. In the UK 17 are not permitted as they didn't become available until the late 80's and well after your triple was made.
I doubt there's any advantage in changing.
Lite the blue touch paper and stand well back!
Stay with 18's. More stability and a positive steering response.
Danger, is my business."