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Spinal 05-25-2010 12:04 AM

using miles/rev feature on xcal3
my car came with the 195/60R15 tires, i switched them to the 205/50R16 tires. so the speedo is slightly off, i see the xcal has a tire adjusting feature, anyone know how to use it? i have little to no idea how to figure out the math involved lol.

Blivit 05-25-2010 06:35 AM

It is looking for revs/mile which you can either get from the tire manufacturer (preferred) or there are many online calculators where you can type in your tire size and they will calculate the value for you.

Spinal 05-25-2010 09:18 AM

thats great thanks, i came up with 838 as the magical number for my tire size. now my question is - the xcal settings are in denominations of 5 so do i put the setting to 835 or 840?

p.s. when i switch to 215/45/17 tires the number is going to be 819 so almost right on the money hehe.

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