Features: *Aluminum alloy and chromium-molybdenum steel: The tooth ring is made of high-quality aluminum alloy and chromium-molybdenum steel, ensuring durability and strength. *Multiple tooth options: The tooth ring has two options- 26T straight tooth and 24T slant tooth, providing versatility for different riding preferences and terrains. *Compatibility: The tooth ring 26T is suitable for Swiss 350, 240, 440,540 hubs,24T is suitableSwiss 3-claw drum and drum tower base rings with 24 teeth. *Smooth and reliable performance: Equipped with a planetary ratchet ring and three-claw gold ring, the tooth ring ensures smooth shifting and reliable performance during cycling. *Easy installation and usage: The tooth ring can be easily installed on compatible hubs and drum systems, making it convenient for riders to upgrade their bikes without hassle. Specifications: *Product Name:bicycle hub ring *Material:Aluminum Alloy; Chromium Molybdenum Steel *Size:M34*1.0*8.0 *Color:black Package Content: 1pcs*bicycle hub ring Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Features: Upgrade Your Hub's Performance with this Superior Aluminum Alloy Hub Ring Material: light weight, good strength and well temperature resistance, good impact resistance Appearance and performance: automatic cutting, smooth edge, fit most of the road bicycles, delicate texture. Compatibility: smooth surface and exquisite workmanship, fit most of the bicycles. Easy Installation: Brand new and high quality, easy to install.