Diablosport tire adjustment

[Tommy Pennington]

Hello everyone, I Just installed my lift on my Silverado and I am running 35" tires. I measured them and they came out to be 35". When I went to adjust tbr speedometer though, it is still off 4 miles at 60mph. I went down to 34" and it seems to be off by 6 if I remember correctly. Does anyone have any advice on setting these? Thanks!

[Travis Whitmore]

If going down made the speedo error go up then reason would dictate going up on the tire size would make the speedo error decrease.