I can understand your reticence, but the reality is that CO2 kit is not heavy. Maybe 100g for inflator and cannisters.I really don't get carrying both. Personally couldn't bring myself to do this purely due to bulk and weight of the unnecessary duplication. Carry two inner tubes and a patch kit by all means, but two methods of inflating your tyres![]()
It just saves time at the side of the road, as even with the best mini pump you're looking at 200 strokes to get to a decent pressure. Plus, with CO2 I know it's at about 110psi without needing to check.