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320touring · 01-18-2012, 08:31 AM

Hi,

I've just replaced 2x 205/60/15's with 1.6mm of tread

for 2 new tyres of the same size with appox 9mm of tread.

My BMW takes its milometer feed from the diff, so the increased circumference of the new tyres will change that..

whats the best way to factor in the % difference, or does anyone know a way to calibrate an electronic speedo/milometer?

thanks

01-18-2012, 08:31 AM	#1 (permalink)
320touring Master EcoModder Join Date: Jun 2010 Location: scotland Posts: 1,434 The Mistress - '88 Bmw 320i Touring SE Team m8 Last 3: 27.17 mpg (US) Germany Beadle - '91 Mercedes 300td (estate, N/A) 90 day: 24.63 mpg (US) The Bloodylingo - '05 Citroen Berlingo Multispace Desire 90 day: 39.77 mpg (US) Shanner Scaab - '03 Saab 9-5 estate Vector 90 day: 26.19 mpg (US) Clio 182 - '05 Renault Clio RS 182 182 90 day: 31.73 mpg (US) Thanks: 90 Thanked 95 Times in 79 Posts	Compensating for New tyres? Calculating the % out my milometer will be.. Hi, I've just replaced 2x 205/60/15's with 1.6mm of tread for 2 new tyres of the same size with appox 9mm of tread. My BMW takes its milometer feed from the diff, so the increased circumference of the new tyres will change that.. whats the best way to factor in the % difference, or does anyone know a way to calibrate an electronic speedo/milometer? thanks __________________ My Blog on cars- Fu'Gutty Cars http://fuguttycars.wordpress.com/ US MPG for my Renault Clio 182 ---------------------------------------------------