View Full Version : 20's and the speedo issue
TBlazer1
06-16-2006, 11:36 PM
Wanna get some rims for the TB , 20's preferably but was wondering if it messes up the speedo or not (wheel size). Don't really want to have any problems or should I go smaller size to match the overall height to the factory 16's.
scjzman
06-16-2006, 11:52 PM
Go to http://www.discounttire.com/dtcs/home.do and search for your vehicle. They have very good fitment charts and tables. I bought a set Yokohama Geolandar 20s from them when I switched from factory 17" rims that came on my 02 TB LTZ.:crazy:
03slt_soccal
06-16-2006, 11:55 PM
275/45r20 work perfect and don't mess with the spedo.
TBlazin7
06-17-2006, 05:10 PM
275/45r20 work perfect and don't mess with the spedo.
He is correct. I have been doing all sorts of research and have been playing with those nifty tire calculators for a couple days now and that size seems to be the best. I should be pulling the trigger on rims tonight then I should have them on the truck sometime next weekend when I can get by my buddys tire shop to get some tires put on them...
Bulldog
06-18-2006, 07:05 AM
I bought some 20" tires and they didn't match my OEM 16's so my speedometer has been off by 2 mph for a few months. The odometer for a 400 mile trip was about 12 miles less than my dash mounted Garmin. However, I ordered a tune from Wait4Me and that should correct my problem because I told them when I ordered the tune and they can apparently adjust things like that. I checked with my dealership and asked them if they could make the adjustment for me and they wanted to charge me $70 for about 5 minutes of work. I will just wait for my tune.