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Smaller tires

Subject: Smaller tires
From: Dave Houser <>
Date: Sun, 09 May 1999 12:06:01 +0000
Just purchased a set of 4 tires thru the Tire Rack, Pirelli P-400's
175/70-14's to put on the NOS Minilites for the 64 B roadster. At
present I have a set of Dunlop SPs of 165SR 14 size on the stock steel
I wanted to make sure that there would not be any clearance problems,
that's why I went for that size.
Well, I mounted one tire on a Minilite, compared it to the height of the
165SR 14 and there was at least a 3/4" difference(smaller) and put it on
the rear. With the tire on the car and jack removed, I looked under and
there is gobs of clearance from the wheel well outboard to the inner
wheel well. So much for that concern. Now, here's the question: Since
I'll have a smaller diameter wheel/tire combination, how many more revs
will the engine have to turn at 60mph? I know I should gain in
acceleration, but lose in making the engine work more at speed.
Anybody help?
Cheers, (Four days to Carlisle!)
Dave Houser

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