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05-18-2009, 09:41 AM
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#1 |
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Registered User
 
Join Date: Jan 2007
Location: Columbus, Ohio
Posts: 4,344
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What size tire for correct speedo reading?
I need to pick up some new tires for my Dad's project - the ones on the truck now are 33s and I want to get him new tires and have the speedo be correct when he drives it.
What size tire was stock on these trucks (1970 C10) so I can buy a comparable size? Still deciding between the 6 lug (15x8) rally wheels and the 6 lug (15x10) slots - not sure which way I am going to go yet. Thanks. |
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05-18-2009, 10:04 AM
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#2 |
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Senior Member
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,883
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Re: What size tire for correct speedo reading?
8.25-15 was standard but there where a few optional sizes.
You can easily change the speedo gear coming off the transmission to get the speedo to read reasonably correct for any tire. BTW, 8.25-15 = 205-R-15 in a radial according to my refs.
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. Last edited by WorkinLonghorn; 05-18-2009 at 10:08 AM. |
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