Originally Posted by jwikoff99
160kph? That'* about 99mph, and would be disappointing. Most GM TRUCKS are governed about there.
Hey, you hit 133 mph. What is the stock rating of your tires, is it Z? Mine were, and I've passed 130, also.
The broadcast sheet says it came with Z reated tires. The fastest I have gone in the Bonneville was 225 but this time I had a passenger that was feeling really nervous so I had to let off. When should it stop?
A buddy of mine has a 2500 HD that quits at 160, with the hypertech programer we have had it to 220.