Re: different size tires (OD)

["Sean Ford" <sean@nwh.org>]

I believe ABS releases a locked brake only when others are still spinning.
Of course, if you are traversing a perfectly smooth sheet of ice and all 4
wheels lock up... well, then your ABS computer thinks that your car is
sitting still!

Sean Ford
sean@nwh.org
Newton-Wellesley Hospital
Newton, MA  02162 (USA)
'92 Audi 100CS 5spd  18K miles (and counting!)
'89 Suzuki Katana 600 14K miles (outdoors, but not on the road... yet)

----------
> From: Grant Lenahan <glenahan@notes.cc.bellcore.com>
> To: quattro <quattro@coimbra.ans.net>
> Subject: different size tires (OD)
> Date: Monday, April 14, 1997 1:13 PM
> 
> Someone asked why you should not run different diameter (OD)
> tires on quattros.
> 
> Different ODs means that the front and rear axles turn at different rates
> and the differential must take up this difference.  PArticularly on a
Torsen,
> this means added wear.
> 
> Most car companies suggest the same on the two drive wheels
> (for 2wd cars) to save wear on the differential between them.
> 
> I think that a significant difference could also confuse the
> ABS, which senses rotational velocity (rpms) and calculates
> a difference to detect a skid. 
> 
> re: above:  does anyone know how the ABS adjusts for turning??
> 
> Grant