Don't buy first and ask later. Luckily, you did alright I would say for that price. Is this crank/bb going on a 6KU? If so, you more than doubled the value of the bike lol. I have this crank on my TK2, and since it is the only legit crank I have used, I will say it is damn awesome!! I have put thousands of miles on mine, from short rides to 75+ mile days. I use mine as a road bike and even though it is technically a track bike, since I got the frame, it has never seen a track.