Hi guys, I am hopping back on my singlespeed after riding my roadbike for a couple of months. I notice that my rear singlespeed wheel (surly hub laced to aerohead rim) spins MUCH slower and for a shorter amount of time than my roadbike wheel (a not-nice shimano whr500). Is this normal? I swapped out my crappy freewheel for a White Industries, which fixed a nasty gravely sound, but it didn't help the sticky wheel. These wheels are only 1 1/2 years old.