Speedometer reset ##
Thread Starter
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Freshman User
Joined: Mar 2001
Posts: 37
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From: Southeast Texas
Speedometer reset ##
From my calculations I come up with 8.61 for 32/11.50-15LT BFG/MT.BFG says 654 revs per mile but I come up with 638.I want
to change mine from 9.72. Any help would be appreciated.93 F150/5.0-E40D/3.55
Thanks
Standman
to change mine from 9.72. Any help would be appreciated.93 F150/5.0-E40D/3.55
Thanks
Standman
Post Fiend
Joined: Nov 2002
Posts: 9,987
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From: Memphis, TN
Posting Guru
Joined: Jul 2002
Posts: 2,205
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From: Vancouver WA
Speedometer reset ##
How did you come up with your figure for revs/mile? If you calculated the numbers based on the height of the tire (31.8?) then it will probably be a little off because of the deflection that happens to the tread on the road.
Thread Starter
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Freshman User
Joined: Mar 2001
Posts: 37
Likes: 0
From: Southeast Texas
Speedometer reset ##
RevsperMile = 20168.11439/TireHeight
93 F150/5.0-E40D/3.55
mrwizard= How do you calculate the ### and what ### did you come up with???
Thanks
Standman
93 F150/5.0-E40D/3.55
mrwizard= How do you calculate the ### and what ### did you come up with???
Thanks
Standman
Last edited by standman; Mar 1, 2003 at 04:22 PM.
Posting Guru
Joined: Jul 2002
Posts: 2,205
Likes: 1
From: Vancouver WA
Speedometer reset ##
That is the right calculation, but... Because of all of the stresses that are exerted on a tire by the weight of the vehicle, the flex in the rubber, etc... the calculation probably isn't going to be exactly what the results will be in actual use. I would just use the rev/mile figure from BFG. I'm sure they've done some serious testing to come up with those numbers.
Just FYI, I came up with 634 using 31.8" tire height.
Just FYI, I came up with 634 using 31.8" tire height.
