Enmja RD-M310 Rear Derailleur, 7/8 Speed Long Cage Bike Derailleur, Direct Mount Bicycle Rear Derailleur with 34T Max Sprocket, for Mountain, Road, Hybrid & City Bikes — Open-Box, 15% Off

🔧 7/8-SPEED COMPATIBLE REAR DERAILLEUR – The RD-M310 rear derailleur delivers precise, reliable gear changes across 7 and 8-speed drivetrains. Featuring advanced light-action technology and 13T/15T pulley design, it provides smooth shifting performance for daily commuting, weekend rides, and light trail adventures. ⚡ LIGHTWEIGHT ALUMINUM CONSTRUCTION – Weighing only 326g (0.35kg), this bike derailleur reduces overall bike weight for better acceleration and handling. The durable aluminum body with coated bushings ensures long-lasting performance with reduced friction and smoother operation ride after ride. 🔄 HIGH CHAIN WRAP CAPACITY – With a total capacity of 43T and support for up to 34T largest rear sprocket, the RD-M310 easily handles wide-range cassettes. Whether you're climbing steep hills or cruising on flat roads, this derailleur keeps your chain tension consistent and shifting crisp. 🚲 UNIVERSAL FIT FOR MOST BIKES – Direct mount design installs directly to the bike frame dropout without extra adapters. Compatible with mountain bikes, road bikes, hybrid bikes, cyclocross, city commuters, and folding bikes. Perfect upgrade or replacement for entry-level to mid-range bicycles. 🛠️ EASY INSTALLATION & RELIABLE PERFORMANCE – Direct-attach installation means no hanger alignment hassles. Simply bolt it on, adjust the limit screws and cable tension, and you're ready to ride. Backed by quality assurance, it's a reliable choice for DIY bike mechanics and professional shops alike.

RD-M310 7/8-Speed Rear Derailleur – Smooth Shifting for Every Ride

Upgrade your bike's drivetrain with the Relwears RD-M310 rear derailleur. Designed for 7 and 8-speed systems, this derailleur combines proven technology with lightweight aluminum construction to deliver precise, reliable shifting mile after mile.

Built for Performance

The RD-M310 features a long-cage design with coated bushings that reduce friction and improve shift quality. The unique 13-tooth upper and 15-tooth lower pulleys provide an impressive 43-tooth chain wrap capacity — exceeding conventional 11-tooth pulley designs — ensuring consistent chain tension across your entire gear range.

Versatile Compatibility

Whether you ride a mountain bike, road bike, hybrid, city commuter, or folding bike, this rear derailleur fits. Direct mount design works with standard compatible dropouts, making it an ideal replacement or upgrade for countless bike models. Supports up to 34T max rear sprocket for confident hill climbing.

Lightweight, Durable, Reliable

At just 326 grams, every gram counts. The robust aluminum construction stands up to the demands of daily riding while keeping your bike light and responsive. Easy to install, easy to adjust — get back on the trail faster.

Specifications:

Brand: Relwears

Model: RD-M310

Speed: 7/8-Speed

Cage Length: Long Cage

Material: Aluminum Alloy

Pulley: 13T Upper / 15T Lower

Chain Wrap Capacity: 43T

Max Rear Sprocket: 34T

Weight: 326g (0.35kg)

Mount Type: Direct Mount

Color: Black