isrummell

i bought a set of new tires that bigger than stock. can you program the computer for the larger tires for odometer and speedometer? i think its possible but i wasnt sure?

dmilkman589

what year? u have a 87 and need too know the same thing

gotstylez

to be honest inless you go from a 30" tire to a 40" tire..theres almost no difference.. i went from a 31" to a 35" barely any difffernce..

dmilkman589

mine is 5 too 10 off

silverado13

what year?

dmilkman589

87 c10

isrummell

sorry the truck is a 98, i have 245/75/16 on im going to 285/75/16

Ezrider_92356

older trucks you can replace the gear on the end of the speedo cable with one of a different size to correct the speedo. some newer trucks you can electronically recalibrate the speedo not sure of the specifics when it comes to Chevy. most trucks are calibrated from the factory to read a little faster than you are actually going so 1 or two sizes up normally does not make a big difference. also remember its a ratio so although your speedo may only be off 2mph at 25 it might be off by 10 at 55. my 89 Toyota is pretty close around town but i was shocked when i got pulled over with my speedo reading 65 in a 65mph zone the cop told me i was doing 78.

silverado13

ifits a 98 c/k 1500, then i have a hypertech power programmer that im trying to sell, it does the trick perfectly

dmilkman589

where can i get the different end for my spedo cable???