Alienation Circle Jerks Chain Tensioner - Solid, Non-Adjustable Bicycle Chain Tensioners for Reliable Performance Upgrade your BMX or mountain bike with the Alienation Circle Jerks Chain Tensioner, engineered for durability and consistent chain tension. Crafted from 6061-T6 aluminum, these solid, non-adjustable chain tensioners are designed to provide a dependable solution for maintaining optimal chain alignment, especially suitable for freestyle, dirt jumping, or park riding. Materials & Construction: Built with aerospace-grade 6061-T6 aluminum, the Alienation Circle Jerks tensioners boast exceptional strength-to-weight ratio, corrosion resistance, and longevity. Their solid, non-adjustable design eliminates potential failure points, ensuring a maintenance-free experience for aggressive riding styles. Performance & Engineering: Engineered for stability and reliability, these tensioners are compatible with any frame, chain, and chainring setup. Their precise dimensions (3/8 size with 3.5-4mm offset) provide a secure fit that maintains consistent chain tension under demanding riding conditions, reducing chain slack and preventing derailments. Components & Technology: Sold in pairs, these tensioners accommodate 3/8 axles or 14mm axles of varying offset sizes, making them highly versatile for various BMX and MTB frames. The solid construction delivers a straightforward, minimalist design that prioritizes durability over adjustability, ideal for riders who prefer a simple, effective chain tensioning solution. Style & Use Case: With a sleek black finish, the Alienation Circle Jerks Chain Tensioners complement a range of BMX and mountain bike aesthetics. Perfect for freestyle, dirt jumping, and park riding, these tensioners are designed to withstand the rigors of aggressive riding while maintaining a clean look. Innovative Features & Benefits: - Solid, non-adjustable design for durability and low maintenance - Compatible with multiple frame types and axles -