Speedo calibration?
Thread Starter
Junior Member
Joined: Oct 2015
Posts: 66
Likes: 0
2008 R320 CDI
Speedo calibration?
Is there a way to re calibrate the speedo if I were to go with a larger wheel and tire setup? I really like the look of 20's but want something a little more than a 40 series tire. I'd like a little more meat to help keep the ride a little more comfortable..
MBWorld Fanatic!
Joined: Jun 2006
Posts: 1,140
Likes: 118
From: Nova Scotia, Canada
2023 GLK250, 1987 560SL
The speedo currently reads 4-5% faster than the vehicle is actually going, so if you increase the wheel diameter, you may actually get closer to reality.
Keeping the same wheel width and profile as the stock configuration but increasing the diameter by 1" (going from 19" to 20" rims) will impact the speedo by 4.1%. That should get you smack dab on.
Keeping the same wheel width and profile as the stock configuration but increasing the diameter by 1" (going from 19" to 20" rims) will impact the speedo by 4.1%. That should get you smack dab on.
Super Member
Joined: May 2008
Posts: 699
Likes: 25
From: Warrington, PA
08 R350, 12 Mercedes R350
Tire calculator.
http://www.discounttire.com/dtcs/infoTireMath.do
http://www.discounttire.com/dtcs/infoTireMath.do
