That gives me 56 gear inches... a 42:20 on a road bike is 55 gear inches so your friend's bike is geared a little lower.

You guys must ride in the Andes.



Seriously... I use that kind of fixed gearing for off road and fixed touring.

My P20 has a 52:14 (70 gi) and I find that pretty light for high speed riding and am going to install a 12 (fixed cog) when I build a new rear wheel.