Quick Summary
The Bgxizin RD-TZ31A rear derailleur is a bicycle derailleur for 6/7 speed drivetrains. It is described as a direct mount rear derailleur with a hanger mount mention in the product name, so the mounting style is an important check before choosing an offer.
The stated drivetrain note references GS 6/7 speed SIS index shifting. For buyers comparing options, the main points are speed compatibility, mounting style, and whether the derailleur matches the bike setup.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Model | RD-TZ31A. Useful for matching the exact replacement part. |
| Product type | Rear derailleur. This is the shifting component at the rear wheel. |
| Speed range | 6/7 speed. Check that this matches the bike’s drivetrain. |
| Mounting style | Direct mount and hanger mount are both referenced. Confirm the bike’s mounting setup before ordering. |
| Shifting system note | GS 6/7 speed SIS index shifting drivetrain is mentioned. Match this to the intended drivetrain setup. |
What to Compare Before Buying
- Speed compatibility: This derailleur is for 6/7 speed use. Compare that with the number of rear speeds on the bike.
- Mounting style: Direct mount and hanger mount are both referenced. Check which mount your frame or hanger uses.
- Drivetrain setup: The GS 6/7 speed SIS index shifting note matters if you are replacing a rear shifting part.
Compatibility, Size and Fit
Fit depends on the bike’s rear derailleur mount and drivetrain setup. Check whether the bike uses a direct mount or hanger mount arrangement before ordering. The stated 6/7 speed range also needs to match the existing rear shifting system.
Before You Decide
Confirm the mount style, the 6/7 speed match, and the RD-TZ31A model before choosing an offer. If your bike uses a different rear derailleur mounting setup, select a version that matches it exactly.
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