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Will - I do, up to a point. Lower than 40, I can't see the point. Harder sidewalls, much less progressive on the limit, harsher ride.
I assume you are referring to the line - If (typo!) the radius of the tyre is more - low profiles reduce this but they are still bigger - I mean bigger tyres usually have a lower profile to offset the overall tyre radius but only up to a point - a 19" ultra low profile tyre has a MUCH bigger radius than a 17" lowish profile tyre. And yes, I know the profile is a ratio/percentage of the tyre width.
I'm not trying to be bloody minded here, just trying to open up a debate about tyre sizes - IMO the fact that 19s look small on the F10 is just a sign of a nutty trend to ever bigger and lower profile tyres. Where will it stop?
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