20 Tooth Sprocket in black steel for single-speed fixie BMX city bikes. The sprocket works perfectly with standard chains 1/2" x 1/8" or 3/32", providing smooth rotation and minimal noise when properly adjusted.

The steel construction with a black finish ensures durability for daily use and mud, while the 20T size offers a balanced gear ratio for speed and maneuverability in the city.

Features & Specifications:

• Product type: Sprocket / rear sprocket
• Use: Single-speed / fixed gear transmission – commuting / recreation / street use
• Compatibility: Freewheel or fixed hub with standard threading, chain 1/2" x 1/8" or 3/32"
• Material: Steel
• Number of teeth: 20
• Weight: 80 g

Important compatibility note: Check the type of hub (freewheel or fixed) and threading before installation – fits standard 1.375" x 24 tpi freewheel hubs. Compatible with single-speed chains (1/8") or 3/32" – not for cassette / multi-speed freehub. Use a chain whip and lockring tool for proper installation.