Model: MG-7SRD; Bike rear derailleur 7 Speed for most kinds of bikes like mountain bike, hybrid bike, kids bike, cruiser bike etc. Features: Smooth shifting, easy and fast to install. Hollow out weight reducing integrated aluminum alloy body.high-strength forging, more stable speed change. Bracket fit (under wheel nut) long cage derailleur, total capacity 30T, pulley/teeth 13/13T. Stability: Made of high quality durable aluminum alloy material and come with excellent shifting performance ensure your safe and stable while riding. Lightweight design reduces chain wear and ensures smooth speed change. Application: Compatible with 6 and 7-speed variable speed transmission systems. Suitable for mountain bike, cruiser bike, folding bike, commuter bikes, tricycles, electric bikes etc. Type: Long cage derailleur, please note this derailleur is direct mount, not hanger mount. Please check your old derailleur mount way before you purchase. Important: We provide excellent customer service, please feel free to contact if you have any questions. MEGHNA Bike Rear Derailleur 7 Speed/8 Speed Derailleur Direct Mount for Mountain Bike Cruiser Bike Tricycle Hybrid Bike