Bike Flashlight Holder for 18650/21700

There are four variants of flashlight holder:

18650 - Inside diameter 24 mm (for example for Convoy S2+) 

• Handlebar diameter 22 mm
• Handlebar diameter 31.8 mm or some gravel bike with eliptical cross-section handlebar with outer cables

21700 - Inside diameter 28 mm (for example for Wurkkos TS22)

• Handlebar diameter 22 mm
• Handlebar diameter 31.8 mm or some gravel bike with eliptical cross-section handlebar with outer cables

For one holder you need one Top part, one Bottom part and 2x knobs and hardware as described below.

Hardware needed for one assembled holder (for ⌀31,8 mm variant):

• 3x M3 hex nut or 3x M3 heat insert nut (some mixed results with heat inserts in TPU)
• 1x M3x25 screw (or 2 in case of ⌀22 mm variant)
• 2x M3x40 screw (or 1 in case of ⌀22 mm variant)
• Superglue

You can either use heat insert nut or you can insert regular hex nut.

TOP PART

In top part are 2 M3 nuts. One on upper side and other is hidden → put a pause in right spot during printing ()!! 

Print with tree supports.

KNOBS

There are two different knobs. Glue correct screw in to the knob with superglue.

• 40 mm (green) is for tightening flashlight and for both 31,8 mm handlebars (21700/18650)
• 25 mm (blue) is only for 22 mm handlebars (21700/18650)

Material:

Recommended material is TPU with hardness around 95 shore A (Devils). 

Model could be printed also from PETG, (PLA) or some technical materials.

Angle:

Flashlight is sitting in holder with 5° angle to keep beam in the middle. If you want to light in the other direction make mirror copy of top part in slicer.

• 22 mm variant is modeled with beam to the left
• 31,8 mm variant is modeled with beam to the right

Troubleshooting:

• If you have problems with length of screws - adjust knob inner height in Z axis (or use different screw)

In photo gallery you can see Wurkkos TS22 with 32 mm variant (TOP_21700_32+BOTTOM_21700_32+2xknob)

Weight is around 40g with screws.

Updates:

2025_02_25 - unification of all assemblies; improving length of screws; small design changes; huge update of user manual