Well had many a car that id look at the speedo top speed and bury it, that is the ones that have speedometers. But being a truck and given its puropose I wont see 140 in this thing - not with some serious chages in setup. Would resemble a Camping World series truck rather than a pre-runner. But begs the question how fast can the sand rails go, maybe and interesting derivitive build there? There I go again making no sense......again