why do they run such large side walls??
where as touring cars run really low profile tyres??
slightly random but im sure someone on here will know
thank you
Cuz if the sidewalls were shorter , the tread wouldnt reach the floor ?
For some reason the aspect ratio of F1 tyres is set by the regulations.
No idea why, but probably introduced when Tyrell did the six wheeler.
i would imagine it has something to do with the ride height of the car, if an f1 cars tyres were any lower the belly of the car would be scraping the floor
quote:
Originally posted by omega0684
i would imagine it has something to do with the ride height of the car, if an f1 cars tyres were any lower the belly of the car would be scraping the floor
The rules state the wheels must be 13" (and they wont increase that as it limits the brakes) so they have to run those profiles really.
The profiles are actually very low, the tyres are something like 335/35's. The reason the sidewalls seem so big is simply a function of the width
of the tyre, 35% of 335 is just under 120mm, or nearly 5" in old money.
Touring car tyres are only about 8 or 9", say 245/35's so 35% is only 86mm, or about 3 & 1/2 ".
Nothing to do with scraping the belly as that would change in the design phase etc, changing ride height is a very mundane excersize in the high spec
world of F1!
I thought it was because about half the suspension travel is in the sidewall.
quote:
Originally posted by scudderfish
I thought it was because about half the suspension travel is in the sidewall.
Regulations govern a 13" rim, speed of vehicle and consequent rotational speed of wheel give some factors. Bigger tyres have bigger contact
patch, more compliance. The only reason there's so much chassis movement from the tyres is because of the tyre, not the tyre be designed as such,
and the spring rates being so high due to areo loads.
Most sutible vehicle runs 13's, from F1, through F Ford, to small tin tops, it's just a good comprimise in brake size, weight and
handling/feel.
Other cars user bigger wheels for looks. Mainly 17's, big, high class cars with 13's would look gash. 17" is a similar senario, in that
it is set as a standard and most other forms of motorsport use them as the tyres are already developed.
[Edited on 7/7/09 by brianthemagical]
[Edited on 12/7/09 by brianthemagical]
Why do touring cars has small tyre walls?
Go to the next BTCC round, look at the pretty cars going fast. now look in the car park. See all the people who have 'race tuned' their
cars? Scraping the floor, wheels tucked up under the arches, rubber band tyres, oversized wheels?
Manufacturers can sell this tosh to the people that think thats 'tuning'
try selling 60 profile tyres on 13" wheels to the trevs in Halfords.
there is some good info there.
stuart
also, F1 is dictated by sponsorship revenue.
Look how much more area you have on a large tyre sidewall for the manufacturers logo. 
quote:
Originally posted by 200mph
quote:
Originally posted by scudderfish
I thought it was because about half the suspension travel is in the sidewall.
trying to recall an explanation given by Martin Brundle and they slo-mo'd the car so you could see how much the tyre deformed over bumps etc. Pretty sure he said a large function of the 'high' tyres was shock absorbance
wow some really in depth answers
i have a much better idea now
thank you all for your responces
