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Old 12-10-2007, 03:48 AM   #6
68K20 x Drill
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Join Date: Apr 2007
Location: Freedom CA
Posts: 488
Re: tire sizing hurts my head

29 x 9.25 R 15 = 235 76 R 15
as per THIS CALCULATOR at www.dakota-truck.net

now that we know that, try the OTHER CALCULATOR from www.miata.net, and plug in the new value, and try to find a size that matches up....
245/60R17 converts to 29X9.65R17, essentially the same as you have now.
295/60R17 works out to 31X11.65R17 and your speedo will read 7.1% slower.
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68 Chevrolet k20 Longbed 350 SM465/205, Dana 44, 14bolt, Power steering, Power Disk Brakes, 35" BFGs.

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