It's so quick and easy and it doesn't even cost anything: do-it-yourself instructions for 0 euros - takes 30 minutes. Watch the video below for instructions on how to build your own multitool holder!
If this self-made bike multi-tool holder is too complicated or not stylish enough for you, there are clever mini-tools from various manufacturers for mounting on the bike. For example, you can mount these MTB tools in the bar ends, in the handlebar ends, in the crank axle or on the bottle cage: Clever bike multi-tools - 13 transport solutions for MTB tools

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