This isn't based on science - but some bikes just feel slower. Why is this? My Aurora is lighter than my 520 and doesn't have a rack (the 520 does.) The geometry? The gearing? I can't put my finger on it. I took the Aurora out for a spin today and yeah, I'm definitely moving slower. Speed isn't my primary concern - but why don't they perform the same? What is making that difference? The 520 has lower gearing even - but I move tons faster on it. I'm not concerned about 26 inch wheels, I'm actually kind of leaning away from the LHT. I know the components are supposed to be good - but unless I can ride one in my size - then it's a no go.