Needed to replace the rear tire on my 2012 pitster pro 140r I was a little skeptical on buying the cst surge mini as their isn't many reviews on it yet and I'm fairly new to pit bikes/ dirt bikes but so far I love it been out once on it hooks up really nice seems like it's gonna be a great tire. I'll eventually replace the front with the surge mini when time comes, I would recommend this tire to any pitbike owner