Yeah I have heard some bad things about the STs, but not much about the STTs.
The STTs are amazing in my opinion, really dig into the dirt.. and get some great traction.. but also don't wear as much on the road as the grapplers.
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'99 2500 24V. Auto. AD100. Qzilla Adrenaline, 4" turbo back (str piped), BD-Power HPVP44, BD Stealth Plate, Boost Elbow, Semi-Built tranny.