Park Tool CC-4.2 Kettenmesslehre Trainer you can switch between an

you can switch between an aero position and a classic grip on the top bar at any time – perfect for road

as with all other hot wax products

Optionally (faster and then including tracking) also via DHL parcel

But that's not necessary

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Park Tool CC-4.2 Kettenmesslehre Trainer you can switch between anNo beating around the bush here, at some point even the best waxed chain will be worn out. If it elongates too much, the other expensive drivetrain components also suffer and, in the worst case, everything is ruined, apart from the shifting performance, which starts to jump with the 10 and 11 sprockets. Changing is usually recommended from half a percent elongation onwards and I'm totally on board with that. These days, sprockets and blades are simply