07-11-2011, 01:01 AM
presta valves are "standard" because they screw shut....hm, why wouldn't cars need that? does the lower pressure in car ties make a difference? the nut that secures them to the rim is helpful. and the smaller diameter is good. yeah, need to be careful with lateral force.
i'm still not sure how you're breaking them.
i'm still not sure how you're breaking them.