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      07-22-2009, 06:07 PM   #20

Drives: 2012 Porsche Cayman R
Join Date: Jan 2009
Location: Austin, TX

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Originally Posted by PunjabiM3 View Post
F1 cars run tires with HUGE sidewalls...I wonder why...
This is due to Formula 1 Technical Regulations on maximum brake size which is limited to a diameter of 10.9" or 278mm and to limit the cooling potential they limited the rim size. The thinking is that 13" rims (332mm max) would limit ability to cool the brakes because of the limited space. The high side wall is a consequence of the small rims.

FYI, F1 cars were braking 4.5G going into turn 10 at the German GP, so I guess that is limited.

2009 Formula 1 Technical Regulations

Favorite Quote on Supercars: "They are designed to melt ice caps, kill the poor, poison the water table, destroy the ozone layer, decimate indigenous wildlife, recapture the Falkland islands, and turn the entire third world into a huge uninhabitable desert... but only after they nicked all the oil." Jeremy Clarkson from Top Gear 05x02 @ 48:55.