Shimano Cassette Tz510 Freewheel 7Spd 14-28T
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Shimano TZ510 / MF-TZ500 7-Speed Freewheel (14–28T)
Shimano MF-TZ500-7 7-Speed Freewheel 14-28T
What it is
Despite being called a “cassette” in some listings, this is actually a:
- 7-speed screw-on freewheel (not a cassette)
- Shimano Tourney TZ / MF-TZ500 series
- Gear range: 14–28T
- Used on entry-level MTB, hybrid, and commuter bikes
Shimano calls it a “multiple freewheel” because the ratchet mechanism is built into the gear block itself, not the hub.
Key features
- ✔ 7-speed drivetrain compatibility
- ✔ Screw-on mounting (threads directly onto hub)
- ✔ Steel construction for durability
- ✔ Simple, low-cost drivetrain system
- ✔ Works with most Shimano 7-speed derailleurs and chains
Gear range (14–28T)
Typical sprocket steps:
- 14 – 16 – 18 – 20 – 22 – 24 – 28
This means:
- 200% gear range
- Designed for basic riding, commuting, and light hills
- Not as wide as “MegaRange” 14–34T versions
Freewheel vs cassette (important)
-
Freewheel (this part):
- Ratchet mechanism is inside the gear cluster
- Screws onto hub
-
Cassette:
- Hub contains ratchet body
- Sprockets slide onto a freehub + lockring
So this part cannot be upgraded to a cassette system without changing the wheel/hub.
Ride feel
- Simple and predictable shifting
- Heavier and less refined than modern cassettes
- Slightly larger jumps between gears
- Very reliable for casual riding
Best suited for
- entry-level mountain bikes
- school / commuter bikes
- older 3x7 drivetrain setups
- budget repairs and replacements
Pros
- very cheap and widely available
- easy to install with basic tools
- durable steel sprockets
- compatible with many 7-speed systems
Trade-offs
- screw-on freewheel = lower upgrade ceiling
- heavier than cassette systems
- limited gear range (14–28T only)
- not ideal for serious MTB or fast road riding
Bottom line
The Shimano TZ510 / MF-TZ500 7-speed 14–28T is a basic screw-on freewheel for entry-level bikes, offering simple, reliable shifting but limited performance compared to modern cassette-based drivetrain systems.
