Bike Crankarm Cap Tool (HEX 10MM!)

Standard wrenches of this type have a long handle and can be awkward in tight spaces. This smaller key lets you spin the bolt in faster and makes it easier to control final torque. The fit on a 10 mm hex is tight, no slop.

Important during installation:

Remember - before you tighten or loosen the cap, you must first loosen the two M6 bolts.

✅ Print settings

• Nozzle: 0.4 mm

• Layer height: 0.2 mm

• Infill: 30% is enough for regular use; 100% gives a heavier, solid feel

• Material: PLA, PETG, ASA, ABS

• Tested on Ender 3 and Bambu Lab A1.

📁 Files

• .stl

• .3mf – A1 print profile used in the photo, set for quality.

The key in the photo was printed in Prusament Blood Red.

🚲 Other tools on my profile: key for the original spline‑type cap and a key for replacement caps of original nuts.