215/85/16 to 235/85/16 Speedometer calibration

[dmistal]

Got to replace my tires,plan on staying with the Michelin LTX's. It's my understanding I won't have a problem with my rims,(99 Dually),but need to know what to do about the speedometer. Thanks.

 

[DKGross]

Try this site

I changed to a larger size and am still not where I want to be but am close.



Try this web site and see if it answers your questions.



http://www.paspeedo.com/calculator.htm



Also Ted Jannetty has a product from Abbot that I am considering. The product is the Abbott Electronic speedometer recalibration module.

 

[Midnight]

dmistal,i replaced my 215 to the 235 and really notice a very little difference. So little the i didnt both to worry about recal.

 

[Koa Man]

I changed from 215s to 235s and the difference is only about 4. 5%. Not worth recalibrating in my opinion. If you are going 60mph according to speedometer... true speed is 62. 7 mph.

Difference is less the slower you go..... and even at 100mph reading... . true speed 104. 5, doesn't make much of a difference.