[Sodemo]

Originally Posted by V8 Fireworks

But that's because F1 cars have piddly torsion bar springs and not proper springs. We don't have such issues on WRC cars with their 500mm of coil sprung strut suspension travel, even on 18"tarmac tyres.




1969 March 15" front tyre:


Looks low profile to me...

So it should be Allison on the return to low profile tyres, no?

13" was only ever due to the rules. Who says F1 tyre suppliers would not have gone to increasing larger diameter wheels & lower profile tyres than 15" of the late 1960's, if they had been allowed to?

Yes, the constructors used the balloonish 13"tyres as an opportunity to design more compact suspension systems with minimal travel, but who says that was inevitable if tyre development had run its course? That didn't happen in sportscar prototype racing after all -- they went to larger and larger wheels up to 18", while using comparatively long travel suspension systems.

But surely in tarmac spec a WRC car only has, what about 3-5cm of effective suspension travel?