Frame sizing?
I'm trying to wrap my head around how frame sizes are determined. I see road bike frame sizes sold as xx CM, i.e. 54CM. When looking at frame dimensions, none of them are 54. Is there a formula used to determine the frame size from the dimensions?
If they don't have me confused enough with the xxCM sizing, they throw S, M, L, XL... at me for MTB or Hybrid. Is there any standard for those sizes?
I'm 5'8" with a 30" inseam and have a Trek Verve 2 in M on order. I was able to test a Verve 1 M size before ordering and it fit. I'm just wondering how the whole sizing works if I want to look for a used road bike.
Thanks
Jim