Shimano Sprocket 7-Speed MF-TZ500 Screw Ring 7 Speed Sprocket Bicycle Freewheel.
- 7-speed freewheel
- 14-28 tooth range
- Screw ring type, per the title
- Shimano Tourney / TY manufacturer line
- 0.06 kg item weight as listed
- Model year 2018
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A seven-speed screw-on freewheel with a modest gear range, for riders replacing an old freewheel on a basic bike. The listing is thin: it does not state materials, thread type or any install guidance.
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ASIN: B073XTMQQVModel: MFTZ5007428_GrisCategory: Cassettes & Freewheels
Overview
A rider with an older seven-speed bike and a threaded hub is the target for this Shimano screw ring freewheel from the Tourney and TY line. The tooth range runs from small to mid-size sprockets for general riding.
The reason to buy is a drop-in replacement from a major maker for a worn freewheel on an entry-level bike. The limit is the near-empty data, with a vague material row, a low weight figure and no thread or hub details.
Who it's for
Casual and commuter riders keeping an older bike running. Anyone upgrading to a cassette system, or unsure what their hub takes, should confirm fit with a bike shop first.
Pros and cons
- Shimano Tourney line
- Replacement for worn freewheels
- Material not stated
- Weight figure looks low
- No hub or thread details
Performance notes
A freewheel combines the sprockets and the ratchet in one threaded unit, so the whole unit is replaced when it wears. Shift quality depends on matching the chain and derailleur to the speed count and the range.
Specifications
| Model | MFTZ5007428_Gris |
|---|---|
| Dimensions & fit | |
| Size | 14 - 28 teeth |
| Item weight | 0.06 kg |
| Capacity & performance | |
| Speeds | 7-speed |
| Other details | |
| Style | Screw ring freewheel |
| Line | Shimano Tourney / TY |
| Model year | 2018 |
Closest rivals on specs
Altus Shimano Cassette Sprocket CS-HG31- Item Weight 0.13 vs 0.1 pounds (+30%)
SRAM Rival Xg-1250 12-Speed Cassette- Item Weight 0.13 vs 0.44 pounds (-70%)
Shimano CS-6700 Ultegra Bicycle Cassette- Item Weight 0.13 vs 0.53 pounds (-75%)
Frequently asked questions
How do I install the Shimano TZ500 freewheel?
The title calls it a screw ring freewheel, but the listing gives no steps or tool list. Check Shimano's instructions or ask a bike shop.
Is the Shimano TZ500 a cassette?
No. The title calls it a screw ring freewheel, which is a different type of rear sprocket unit.
Does the Shimano TZ500 fit a bike with fewer gears?
The listing sells it as a 7-speed freewheel and does not mention other speed counts.