I ran these valve stems all 2016 on 2 bikes. I only bought them to match my e13 wheels and because they came in black.
They work great at holding air but do have a serious drawback (at least on my version).
I live in the Okanagan so tire shredding flats are a weekly occurrence, removing these valve stems to get a tube+clif bar wrapper into the tire to limp home requires NOT losing the super tiny o-ring that goes between the 2 components.
Fortunately, each kit comes with spares if you manage to not lose them in your tool box.
As far as gumming up, never had an issue but I do give them a rinse when they go back in. Considering I replace the tires 3-4 times a season, they never really get a chance to dry out.
May 11, 2017, 10:59 a.m. - 1part@atime
I ran these valve stems all 2016 on 2 bikes. I only bought them to match my e13 wheels and because they came in black. They work great at holding air but do have a serious drawback (at least on my version). I live in the Okanagan so tire shredding flats are a weekly occurrence, removing these valve stems to get a tube+clif bar wrapper into the tire to limp home requires NOT losing the super tiny o-ring that goes between the 2 components. Fortunately, each kit comes with spares if you manage to not lose them in your tool box. As far as gumming up, never had an issue but I do give them a rinse when they go back in. Considering I replace the tires 3-4 times a season, they never really get a chance to dry out.