Results 1 to 5 of 5
10-22-2009, 09:43 PM #1
- Join Date
- Jul 2009
Larger tires and speedometer/odometer variation
With larger than stock tires installed on my Colorado the speedometer is 4-5 MPG less than actual at speeds of 65-75 MPG (checked with GPS).
How does this affect the odometer? Am I putting more miles on my truck than actual??2006 Colorado 3.5L I5 Z71 4x4
AEM Cold Air Intake
2" Add-A-Leaf w/ 2" torsion bar key lift
Rancho shocks all the way around
31 x 10.5" BF Goodrich T/A KO w/ Black letters out
15" American Racing ATX Mojave Teflon coated rims
Flowmaster Super 44 exhaust
Alpine PDX 4 x 100w amp
Alpine iDA-x305 iPod control deck
Alpine IMPRINT Audio processor
Diamond Audio 6.5" comps (4) w/ custom install tweets
200 sq. ft. of FatMat sound deadening material
10-23-2009, 03:50 AM #2
Hmm, your wheels have a larger circumference, so they are traveling further per every rotation of the wheel, so I think your odometer would actually read less?
EDIT: So yes, if your wheel circumference got 10% longer, you will have traveled 110 miles when your odometer says you've been 100. Would probably throw off your DIC readings too. Wonder if that can be adjusted..?
Last edited by daweinah; 10-23-2009 at 03:52 AM.
10-23-2009, 04:45 AM #3
Yes this can be done by changing the gear in i think the transfer case to match the size of your new tires.
1995 Chevy Silverado
Best Engine In The World!!!!!
Once i had a nearly dead battery and was only able to get 1 slow crank per attempt, Once to the fifth crank she fired up! (True Story)
Do you have a Tahoe,Yukon or a suburban? Join My Group
10-23-2009, 01:28 PM #4
I believe you can also modify the ECU to compensate for larger tires by changing shift points as well as speedo/odo readings??
2008 Silverado Crew LTZ Southern Comfort conversion
SoCo cat back duals
6" Pro-Comp lift
ARE cap with Yakima rack system (winter)
GM Hard tri-fold tonneau (summer)
GM rear wheel liners
2014 Silverado 2500HD CCSB LTZ Z71 6.6 DMax/Allison
6.5" BDS 35" Nitto Trail Grapplers
LineX/wheel liners/OEM tube steps/sunroof/slider/mirrors/Nav/cablights/trifold tonneau
Getting the toys to the track with a 2007 Roadmaster 7X12 V-Nose 7k tandem "Mobile Man Cave".
10-23-2009, 05:50 PM #5
You can adjust for the tire size (and gear size if you ever change gears) with a hand held tuner. I used a hand held tuner to adjust my speedo for my 35 inch tires and my gear change from 3.73 to 4.56. I used a garmin and kept adjusting with the hand held until my speed was dialed in perfect.
Bobby - North Carolina
2008 4x4 5.3L V8
6" Suspension Lift and 1.5" Body Lift
20x9 Ballistic Jesters w/35" Toyo Open Country MT's & 1.5" rear wheel spacers
4:56 Yukon Gears
Hypertech Speedometer Calibrator
Baja style bed mount spare tire carrier
Flowmaster 40 series dual exhaust
Recon Smoked LED tails/3rd brake lights/black projectors w/switchback LED's in the corners
N-Fab Nerf Steps
No Fear Pedals
Tint, Line-X bedliner, Window visors, Rear wheel well liners
Painted front grill, bow ties and door badges, de-"lettered" tailgate
Powder coated front and rear bumpers
By drwdominance in forum Wheels & TiresReplies: 3Last Post: 07-14-2010, 06:55 PM
By JustXtreme in forum Chevy Silverado Forum (GMC Sierra)Replies: 0Last Post: 05-07-2010, 01:16 PM
By trainergeneral in forum Wheels & TiresReplies: 0Last Post: 12-31-2009, 10:45 AM
By Jmill77 in forum Wheels & TiresReplies: 15Last Post: 10-05-2008, 08:38 PM