Originally Posted by
RGMN
You want larger cartridges than 16g for a 42
if you want to get to 70 psi, more like a 38g. I find
MSW's inflation chart to be the most accurate for figuring out what cartridge size is needed.
I ride 700x43s...I have no idea why on Earth anyone would even want 50PSI, even 40PSI is more than enough to have rock-firm tires....70PSI is lunacy.