This bike maintenance video features an experienced bicycle mechanic removing and installing an Octolink-ISIS cartridge from the bottom bracket of his mountain bike. You need some specialized tools if you're going to try this bit of mountain bike maintenance yourself, but doing so will save you time and money on going to the shop, so try it!
Just updated your iPhone to iOS 18? You'll find a ton of hot new features for some of your most-used Apple apps. Dive in and see for yourself:
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