Quick Summary
The Shimano RD-TX800 rear derailleur is a direct-attach bike derailleur for 7/8-speed drivetrains. It is described with a black finish and RD mount, and the text also references a Smart Cage design and MegaRange compatibility.
For buyers, the main checks are drivetrain speed, attachment style, and whether the derailleur cage setup matches the gear range on the bike.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Brand | Shimano, the named brand on the product. |
| Model | RD-TX800, the model identifier used for this derailleur. |
| Product type | Rear derailleur for a bicycle drivetrain. |
| Speed | 7/8 SPD, so the drivetrain speed needs to match the bike setup. |
| Attachment | Direct attach with RD Mount and a 10×1 standard for secure rear derailleur attachment. |
| Design | Long cage design and Smart Cage are both referenced in the product copy. |
| Finish | Black color finish. |
What to Compare Before Buying
- Drivetrain speed: This derailleur is described as 7/8 SPD. Match it to the speed of the bike drivetrain.
- Attachment style: It uses direct attach with RD Mount. Check that the bike uses the same mounting setup.
- Gear range needs: The text mentions Smart Cage, MegaRange compatibility, and a long cage design. Compare those terms with the gear range you need.
- Finish: The derailleur is black, which may matter for matching the bike build.
Compatibility, Size and Fit
This derailleur is centered on drivetrain and mounting compatibility. Confirm that the bike is set up for 7/8-speed use and that the rear derailleur mount matches the direct-attach and RD Mount style named here. The cage design is also part of the fit decision because the text references both Smart Cage and a long cage layout.
Before You Decide
Check the bike’s drivetrain speed, the rear derailleur mount, and the cage style before choosing this model. If the bike needs a different attachment standard or a different speed range, a different derailleur should be selected.
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