Runwell KUROKO chainring nut tool

$ 12.00

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By far the most innovative little tool to ever exist, Runwell's KUROKO is a special tool for making easy work of installing and removing chainring bolts.

To use, secure the back of the bolt with two claws and a 6mm hex wrench and tighten the bolt with a 5mm hex wrench from the front. Then, throw all of your other chainring bolt tools in the trash.

Includes a cute lil' transparent pouch for storage.


KUROKO was developed with reference to bolts attached to NJS certified parts. Some other chainring bolts may have bolt grooves that are shallow and may lack stability during use.

• durable steel construction

• length: 16cm

• weight: 10g


All the cool kids are doing it. You want to be cool, right?