Rear Tyre Size 170/60 vs 150/70

[sanddweller]

It may be answered somehwere, here already - but I cannot find it..

Does anyone know if a 170/60/17" can be fitted on the 2012 NTX spoked 4.5" rim?
*replacing the standard 150/70

I think width clearance should be ok, and diameter should reduce 170/60=102mm, 150/70=105mm - I'm concerned that the tyre will hold in the rim.

thanks,
--geoff

 

[GTM®]

A 170 technically needs a 5.0-5.5" rim. If you can get it to bead, it will reshape the tire making it taller of course.
What tire are you looking to mount?

 

[sanddweller]

I was thinking about another Michellin Pilot Road 4, but the harder compound 'GT' version is not available in the 150. (only the soft 'trail' and mid standard versions)
I scrubbed down the standard in 10,000km (photos here https://www.guzzitech.com/forums/threads/touring-tires-for-stelvio-ntx.15237/)

 

[sanddweller]

Well, for the record.. At the tyre shop today the owner there was very helpful, and also inquisitive how the 170 would go, so fitted the 170/60 PR4 GT on the Stelvio's 'rim. It went on nicely, and fitted fine, but, the shoulder of the tyre was pulled down a bit, and just a little odd, giving the tyre a taller and rounder profile than desirable. Decided to abandon the idea and went with the PR4 Standard 150/70 again.
(FWIW, a sticker on the new tyre mentioned 325kg (the GT had 355kg). With the Stelvio weighing in at 300kg on its own, and add another 100+ for me and luggage and fuel.... Not sure what that rating means - presumably as total weight is distributed over two wheels, then probably ok...)