I have been running 225, 70, R15 tires on my '69 vette since I could
get radials on the car. I've had some fender-rubbing problems in the
past, so I've decided to go to 215, 70, R15s. Until they wear out, I'll
have two 225's on the rear and new 215's on the front. I'll then go to
all 215's. Will my speedometer readings differ by any noticeable amount
with the 215's on the car? Will the 215's cause any problems at all?

I've been told that the 215's are actually closer to the F70's that
came on the car.

Thanks,
Charles