I have been trying to find out without a shadow of a doubt if Thunder trucks shorten your wheelbase due to the way that are drilled centered on the baseplate as opposed to Venture, which drills more traditionally towards the back of the truck.
I know that kingpin angle and pivot stem play a part in this too as wheelbase is actually axle to axle and not solely dependent on how your deck is drilled...
That being said, I've measured axle to axle with both Venture 5.0 Lows and Thunder 145 Light lows on a 14" wheelbase and the Thunders seem to be about 0.125" inches shorter axle to axle, but I can't guarantee if I'm lining things up correctly due to variances in axle tilt and human error.
Anyone have any info they can contribute to this? This might be discussed in the trucks set-up thread, but didn't see anything while looking for it.