ACS threaded freewheels that are focused on durability for standard thread applications. - Nickel plated sprocket ring fits 1/8" and 3/32" chains - Cold forged for high-torque strength, and increased durability - Three-pawl design provides engagement every 12 degrees (30 steps total) - Fits Standard 1.37" x 24tpi hub threads - Removable with standard 4-prong tool SPECIFICATIONS - Freewheel Teeth: 16 - Color: Silver - Cassette Body Type: Threaded Standard 1.37" x 24tpi - Weight: 181.4 grams