I never had any issues mounting gp4k or its variants on any of my rims in the past, but I have heard nothing but horror stories on the gp5k getting them mounted, the first time at least, so this has led me to avoid for the time.
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Brian | 2023 Trek Domane SLR 7 AXS | 2023 Trek CheckPoint SL 7 AXS | 2016 Trek Emonda ALR | 2022 Trek FX Sport 5
you should learn to embrace change, and mock it's failings every step of the way.