so far so good
i bought these to replace some really old tioga extreme xc's. these tires have a lot of bite and traction. they have yet to wash out on me yet even when im cookin into corners. im running the 2.1 front and rear and it seems to be working fine. no complaints. they roll fast when pumped up a bit higher but that takes away from traction so you have to find a middle ground.
for 18 dollars it was well worth the money!