Mine feels really solid for some reason. Also, since its a CHEAPPPP bike, i felt the need to make it look like a CHEAPPPP bike, i COVERED it in black gaffers tape. We got 2, i tuned my derailer, it shifts smoothly(as CHEAPPPP bikes go) and for some reason it feels faster then stock when i put the tape on... Could the tape really make an aero difference? No worrys at 25.5mph expect for now i'm worrying about my bearings locking at that speed.