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I've been using Michelin Aircomp A1 butyl tubes for a year with no complaints.
The last two I purchased, despite having the same packaging at part no., so far as I could tell, came with replaceable valve cores. Hrm, okay...
Usually my tubes lose about 2 psi in a day. The tubes with replaceable cores -- both of them -- seem to lose about 10-15 psi / day. I inflate my tyres before each ride, so it's not a big deal, but it seems a little weird.
Anyone?
No, I didn't end up with latex by mistake.
The last two I purchased, despite having the same packaging at part no., so far as I could tell, came with replaceable valve cores. Hrm, okay...
Usually my tubes lose about 2 psi in a day. The tubes with replaceable cores -- both of them -- seem to lose about 10-15 psi / day. I inflate my tyres before each ride, so it's not a big deal, but it seems a little weird.
Anyone?
No, I didn't end up with latex by mistake.
