Library › Everyday mounts › Bicycle ·
Bicycle bottle-cage bosses: M5 × 0.8 on 64 mm
What is the bottle cage bolt spacing on a bike? · Standard part · basis: Wikipedia, Bottle cage: two holes 64 mm (2 1/2 in) apart, threaded for M5 × 0.8; a standard cage holds a 73 mm bottle
Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features
- sizes
- 4 in table
Notes
- Frames carry pairs of threaded bosses (or rivet nuts) for a bottle cage: M5 × 0.8, 64 mm between centres. The same pair is used for pumps, tool kits, accessory cages and many mounts.
- The 64 mm is the published metric figure; 2 1/2 in is 63.5 mm. Slotted cage holes take up the difference; for a part with round holes, check the frame.
- Files: the pattern as a DXF (two Ø5 circles, the M5 major diameter, 64.0 apart) and a template strip 80 × 12 × 3 (my size) with Ø5.5 holes, the ISO 273 medium clearance for M5.
- A standard cage holds a Ø73 mm bottle.
Sizes
| feature | mm | from |
|---|---|---|
| boss spacing | 64 (2 1/2 in) | Wikipedia, Bottle cage |
| thread | M5 × 0.8 | Wikipedia, Bottle cage |
| bottle a standard cage holds | Ø73 | Wikipedia, Bottle cage |
| clearance hole drawn | Ø5.5 (M5 medium, ISO 273) | ISO 273 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| holes | Ø5.5 on 64.0 | M5 × 0.8 screws into the frame bosses (ISO 273 medium clearance) | designed | bottle-boss-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Bottle cage: two M5 × 0.8 holes 64 mm apart; standard cage holds a 73 mm bottle | web | CC BY-SA 4.0 (text) verify |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| bottle-boss-pattern-64-m5 | Bottle-cage boss pattern: two holes 64.0 apart, Ø5.5 (M5 medium clearance, ISO 273) in an 80 × 12 × 3 round-ended template strip (the strip size is mine); DXF = two Ø5 circles (M5 major) 64.0 apart | STEP · STL · DXF |
Plain text: sheet.txt · JSON: /api/geometry?object=bicycle-bottle-cage-bosses

How it fits
Connects to
Alternatives
You might also need
Questions
What is the bottle cage bolt spacing?
64 mm between centres (2 1/2 in), M5 × 0.8 screws.
What size screws hold a bottle cage?
M5 × 0.8, usually 10–12 mm long, into the frame's bosses.
What diameter bottle does a cage hold?
73 mm on a standard cage.

