Site News - 11/22 Member of the Year Voting
Date: Sat, 28 Apr 2007 21:36:00 GMT
From: johannes <>
Subject: Re: Classic 900 - aluminum or steel/best tires for sport driving wrote: > > Most of the used stuff I'm looking at is Alu 15"x6" with 205/60. This > profile is plenty tall to deal with the smooth roads here (there ain't > no Major Deagan Expressway in Deutschland!). The 185/65's I have now > are a bit squirrelly up in the 100mph+ range. > > Conceptually I figure that aluminum rims not only allow faster > accelleration and braking, as since being lighter, there is less > rotational inertia, I don't believe that this has any significant effect at speeds eh.. under 100mph or so, but I'll have to get my calculator out. > but also, a lighter wheel can move up and down > faster, allowing the suspension to react faster to bumps and dips. Yes, this is perhaps more like it. The weight of the wheels doesn't depend on speed (unless close to speed of light :-), so lighter 'un-sprung' weight is an advantage for handling and ride.

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