Originally Posted by
colt1954
...but making the hole less abrasive is a good point!
I drill all my wheels to fit Schrader valves. can't stand presta. after drilling I debar them w/ a cpl diff. small files until they feel good to my touch, then coat the hole w/ some black paint. not sure why a wheel with an original Schrader hole would need treatment, but yeah feel it & see if it feels sharp. suppose it could be a manufacturing defect. sounds like it has been the same wheel, twice? just 2 times? how old is the bike/wheels? what brand are the wheels? wonder what brand tubes you are using, as well. & are you pumping there tires to a high enough pressure?
