I was riding a custom conversion built around an aluminium MTB frame that came in at 7.8kg so the charge minus the bits above is about 9.8kg but to be honest I hardly notice the difference. What I have noticed is the tyres/rims. I had 700c/23's on my last and on the charge they are 700c/28's which obviously give a bit more road contact needing more fuel (my energy!) to travel. If I can get away with slimmer tyres on these rims then I will when I get the inevitable puncture. Incidentally does anyone know if I can fit slimmer tyres on the charge rims (Alex DM18, silver, alloy, 700c, ANOD. W/CNC sidewall, 14Gx32H)? Any help - greatly appreciated.