Our Aluminum Single Speed Cogs feature extra tall teeth for reliable chain retention when using chain tensioners. Each cog is reversible and features a 4.5mm base width to keep the cog from digging into your freehub body. Choose from five anodized colors: black, red, blue, purple, and green. Tap the photo to learn more. #wolftoothcomponents #machinedinminnesota #singlespeed #gravelbike #gravelcycling #mtb #mountainbike #CX #mtblife #gravel