Shimano MF-TZ21 (14-28T)
Shimano MF-TZ21 6-speed threaded freewheel with 14-28T cog range. A basic threaded freewheel used on entry-level hub motor conversion kits and older drivetrains. Threaded freewheels screw directly onto a threaded hub shell. Compatible with 6-speed derailleurs and shifters. Common on budget geared hub motor kits.
In brief: 6-speed cassette. 14-28T range. From $8.
Specs verified Jun 10, 2026
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Specifications
Specifications
- Speed Count
- 6-speed
- Cog Range
- 14–28T
- Freehub Type
- Threaded (Screw-on Freewheel)
Physical
- Weight
- 240 g
