went from the 245 - 75R - 16 Firestones to Goodyear Wrangler A/Ts' 285 - 75R - 16.
Any idea how far off my speedo will be?
Approximately 2 inches taller.
Thanks,
Posted by poSSum (Member # 119) on :
Not Ken C but I do have a calculator on my desk so I can do the theoretical.
You'll be going about 8% further every revolution if the tire diameter is accurate w.r.t the given dimensions. I get an overall height of 30.47" for the originals, 32.83" for the new ones.
You have a tach ... check these in Drive ... (not OD).
rpm kph 1000 38 1500 57 2000 77 2500 96 3000 115
Posted by Hawkeye (Member # 88) on :
thanks Art, I'll check this afternoon - with the Post It note stuck to the dash.
