Choosing the right derailleur is essential for reliable shifting on rough terrain. For mountain bikes, direct-mount designs offer rigidity and precise alignment, while cage length and total capacity determine gear range. This guide highlights five well-regarded derailleur options from Inkesky, Relwears, and Huazu, all suitable for 6/7/8-speed systems with direct-mount or dual-mount setups. A quick summary table follows, then detailed sections explain mounting, compatibility, and maintenance to help riders pick the best derailleurs for trail riding.
| Product | Brand | Speeds | Mount | Notes |
|---|---|---|---|---|
| Inkesky RD-TZ31-GS Rear Derailleur | Inkesky | 6/7 | Direct Mount | Direct-mount only |
| Relwears RD-TZ31-A Rear Derailleur | Relwears | 6/7 | Direct Mount | Suspension-capable variant; hanger option listed |
| Relwears Altus RD-M310 Rear Derailleur | Relwears | 7/8 | Direct Mount | Altus RD-CT95 technology |
| Relwears Tourney RD-TY300 Rear Derailleur | Relwears | 6/7 | Direct Mount | Long cage; 43T total capacity |
| Huazu RD-TZ31-A Rear Derailleur | Huazu | 6/7 | Direct Mount/Hanger | 34T capacity; 28T max, 14T min |
Inkesky RD-TZ31-GS Rear Derailleur
The Inkesky RD-TZ31-GS is a six- or seven-speed rear derailleur designed for direct-mount installation on mountain bikes. Its medium cage provides a balanced chain wrap for common 6/7-speed cassettes and rugged trail riding. By avoiding a hanger mount, this derailleur emphasizes rigidity and alignment under load, making it a solid option for riders who rely on dependable shifts on rough terrain.
Key considerations for this model include frame compatibility and gear range. It is explicitly described as a direct-mount derailleur for mountain bikes, not a hanger-mount unit. Before purchasing, verify your frame has the proper bosses and that your shifter supports 6/7 speeds. The direct-mount design can yield crisper shifts on demanding trails when the frame is built to accept it.
- Mount: Direct Mount
- Speeds: 6/7
- Cage length: Medium
- Notes: Direct Mount only; not hanger
Relwears RD-TZ31-A Rear Derailleur
Relwears RD-TZ31-A is a six- to seven-speed derailleur marketed for direct-mount use, with a versatile design that also fits suspension-equipped frames. The model is positioned for mountain bikes, kids bikes, and commuters, emphasizing durability through aluminum alloy construction and improved shifting performance. The listing notes a hanger-mount variant (RD-TZ31A-Hanger), suggesting compatibility across frame styles.
Compatibility notes emphasize dual mounting options and precise adjustment. The product is described as a direct-mount rear derailleur for 6/7 speeds, with a variant available for hanger mounts. For riders upgrading frames or mixing components, confirm frame bosses and shifter compatibility. The aluminum alloy construction supports durability while maintaining a reasonable weight for everyday trail use.
- Mount: Direct Mount (Hanger variant available)
- Speeds: 6/7
- Durability: Aluminum alloy
- Notes: Suspension-compatible option mentioned; precise adjustment emphasized
Relwears Altus RD-M310 Rear Derailleur
Relwears Altus RD-M310 Rear Derailleur is a seven- or eight-speed unit built around Altus technology (RD-CT95), designed for direct-mount installation on both mountain and road bikes. It emphasizes smooth shifting across a broad range, with a lightweight design suitable for everyday trail use. This derailleur is positioned as a reliable option for riders seeking durability without excessive weight on mixed-terrain rides.
Key specifications include a maximum rear sprocket of 34T and a total capacity of 43T, enabling a wide gear range for climbs and flats. The model prioritizes reliable performance and easy adjustment, appealing to riders who want dependable shifting without a premium price. It pairs well with mid-width chains and 7/8-speed cassettes commonly found on many entry- to mid-level systems.
- Mount: Direct Mount
- Speeds: 7/8
- Max sprocket: 34T
- Total capacity: 43T
- Notes: Lightweight design; Altus technology
Relwears Tourney RD-TY300 Rear Derailleur
Relwears Tourney RD-TY300 is a six- or seven-speed rear derailleur with a direct-mount option and a long cage design. The long cage helps maintain chain wrap on larger cassettes, while the derailleur supports a total capacity of 43T. This model suits mountain bikes and other trail-oriented bikes that require a robust, easy-to-install solution with a broad gear range.
Installation and compatibility notes emphasize direct-mount practicality and a wide gearing range. The listing describes suitability for mountain bikes, road bikes, and trail bikes, making it a versatile choice for riders who may mix uses. With a 43T capacity, it accommodates a variety of cassette configurations, including larger sprockets common on rugged terrain.
- Mount: Direct Mount
- Speeds: 6/7
- Cage: Long
- Total capacity: 43T
- Max sprocket: 34T; Min sprocket: 28T
Huazu RD-TZ31-A Rear Derailleur
Huazu RD-TZ31-A is a versatile 6/7-speed rear derailleur offering direct-mount and hanger-mount compatibility for varied frames. The construction combines aluminum alloy with plastic alloy components to balance durability and weight, making it well-suited for trail riding where frames may differ in mounting standard. The derailleur provides a total capacity of 34T, with the largest sprocket at 28T and the smallest at 14T, enabling a broad range of gearing options for hilly terrain.
This model emphasizes mounting flexibility and range. It is designed for riders who may upgrade frames or prefer a system that can adapt to different mounting configurations. The 34T capacity supports common mid-range cassettes, while the 28T maximum sprocket supports climbing and steady momentum on steeper grades.
- Mount: Direct Mount/Hanger
- Speeds: 6/7
- Total capacity: 34T
- Largest sprocket: 28T; Smallest: 14T
Buying Guide
Key Purchase Considerations
Mount Type: Direct-mount derailleurs provide solid alignment and reduced flex on rugged trails, but require frames with mounting bosses. If your frame lacks these bosses, look for hanger-mount options or models that offer both mounting styles.
Gear Range and Capacity: Match the derailleur’s total capacity to your cassette and chainring setup. Six- or seven-speed systems often use derailleurs with around 43T total capacity, while 34T-capacity units fit lighter configurations. Ensure the derailleur can accommodate your planned gear range.
Speeds and Shifting: Confirm compatibility with your shifter (6/7-speed or 7/8-speed). Models with Altus technology or similar design cues tend to deliver smoother shifts across the range, especially under load.
Cage Length and Weight: Medium cages suit many 6/7-speed setups, while long cages handle larger cogs but add weight. Choose based on cassette size and terrain demands; heavier riders on steep climbs may prefer longer cages for reliability.
Durability and Maintenance: Aluminum alloys and quality bearings help withstand trail abuse. Check for availability of replacement pulleys and ease of maintenance, since field repairs are common on remote rides.
Product Comparisons
| Product | Mount | Speeds | Total Capacity | Max Sprocket |
|---|---|---|---|---|
| Inkesky RD-TZ31-GS | Direct Mount | 6/7 | Not specified | Not specified |
| Relwears RD-TZ31-A | Direct Mount (Hanger variant available) | 6/7 | Not specified | Not specified |
| Relwears Altus RD-M310 | Direct Mount | 7/8 | 43T | 34T |
| Relwears Tourney RD-TY300 | Direct Mount | 6/7 | 43T | 34T |
| Huazu RD-TZ31-A | Direct Mount/Hanger | 6/7 | 34T | 28T |
Maintenance And Installation Tips
- Verify frame compatibility with the derailleur’s mounting style and ensure the frame bosses or hanger are in good condition before installation.
- Follow the manufacturer’s torque guidelines and adjust limit screws to avoid overshifting beyond the cogset.
- Check cable routing and tension; replace worn cables and lubricate moving parts to maintain smooth shifting under load.
- Inspect pulleys for wear and replace as needed; keep the derailleur clean from mud and debris after rides.
- Test shifts on varied terrain to confirm alignment and adjust B-tension if the upper pulley scrapes the chain or shifts sluggishly.