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right tires size for a truck 73'

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i like to know if the tires i just bought are the right ones for a 1973 datsun pickup.

205 75r14


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205/75R14s are 26.11" tall.


The 620 truck came with 6.50 X14 or today's...


P185/75R14.... 24.20"

P195/70R14 ....24.75"



Are all withing 1/2" diameter so the speedo will be correct, only the width is different. The 205/75R14s are two inches taller. So at 50 MPH on the speedometer you are actually going 54.13 or over 8% faster than indicated.

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