Russell wrote:
Where does it say they are a 90% aspect ratio? If it's the case that there's no ratio marked then it's universally accepted that it's a standard 80% profile.
The Michelin X 125x15 is roughly 90% aspect ratio, it doesn't say it on the wall but then again, it's only been very recently the tyre manufacturers have been putting "80" on the sidewalls of their 80 profile tyres so nothing new there.
A 125x15 Mich X is roughly the same diameter as a 145(80)x15 IIRC
