40s will ride rough. my last tires were 215/40/17. it was rough. of course, birmingham has bad roads. worried me that i'd bend a rim. now i've got 215/45/17, still looks good, fills out that slight bit extra in the wheel well, less worry about bent rims, and probably notice a slightly better ride.
i had 2 the the 912's in my last set of tires. the other 2 were azenis that were close to new when i got the rims from a guy. the tires didn't last. i probably drove it a little hard, but not beating it. the alignment was indeed bad for a while, so i'll concede to that fact and that definitely was the cause of the uneven wear pattern. even so, i definitely didn't get 25,000 miles out of those tires. actually, the 912's were nearly race slicks by the time i replaced all 4. the 2 azenis, which the guy had estimated had 5-8,000 miles on them when he sold me the rims, they had more tread left. tires had been rotated a few times. again, bad alignment caused uneven wear...but still, those 2 tires were SLICK. though before going bad, they were great. loved them.
anyways, just a few months back i had to replace all 4, on a budget, so i actually ordered the nankang ns-1 from discounttire.com for about $65 each. older model tire, chinese company, and cheap. though being an older model is part of the price being THAT low. even so, i won't claim they're amazing, but i've been a bit shocked by them. they're outperforming the price tag and i've got 5,000+ miles. if you're tight on cash, think about.
with all that said, next time i'm up for tires, i'll likely consider the falkens again. i do believe falken guanantees the 912 them for 40,000 miles, so check on that and find out what you have to do to make sure they get replaced if they don't last. with that guarantee, i'd buy them again.
