The Barrier Sprocket is BSD's latest plastic guard sprocket style, built for grinding, sliding & everything in between. It's built from fully CNC machined 7075 alloy that's strong, durable & lightweight paired with a high density nylon guard that adds protection to your cranks & your chain. The BSD Barrier Sprocket can be run on 19mm, 22mm & 24mm spindles with the included adapters. section Product Specs TYPE: Bolt-On
Material: Alloy WEIGHT: 149.7g (5.28oz)