tire size and gear ration for quater mile - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
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post #1 of 2 (permalink) Old 04-18-2017, 07:08 AM Thread Starter
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tire size and gear ration for quater mile

Im currently running 305/40 18 drag radials. I have 3:73 gears. 6 speed manual. Im having to shift into 5th gear in the 1/4 mile, Current tire is 28 inches tall. If i go with 305/35 18, thats a 26 inch tire, will that smaller diameter tire get me through the traps in 4th instead of 5th. im not sure how tire size affect gear ratios. thx Rich
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post #2 of 2 (permalink) Old 04-18-2017, 10:17 PM
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Re: tire size and gear ration for quater mile

It will be the other way around a smaller diameter will cause more RPM so you will have to shift into % sooner!
A taller tire is what you need to drop the rpm so you can go faster!
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