larger wheels and speedo accuracy

[jdbubb@ix.netcom.com (Dan Bubb)]

OE tires in size 175/70 x 13 run about 914-930 revs/mile depending on
manufacturer
185/60 x 14 914-926 revs/miles
195/50 x 15 890-925
205/40 x 16 890-929
205/45 x 16 873-893
205/40 x 17 870-884

So, if you went from a smallish 185/60 to the largest 205/40 x 17 your
speedo would change by 6.5% or off by ~5mph at 70.
A 205/40 x 16 will get you damn close to OE tire revs/mile unless you
buy Kumho which seem to be on the large size.
(all data courtesy Tirerack.com)
Dan


"Foxx (in a box)" wrote:
> 
>   i know that there are people on the list that are running larger than
> normal wheels on their rides. i was just wondering what you've/they've
> done to make the speedo close to accurate. i'm looking at 16" wheels,
> but don't really want to run rubberbands, but i want to be able to look
> down while doing 70 and it look close to 70. any info would be
> appreciated. thanx.
> 
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