Chain retention This bicycle chain guide is designed to provide reliable chain retention, keeping the chain securely in place even under demanding riding conditions. E-Type derailleur installation Designed for easy installation with an E-Type derailleur on your bike. It offers straightforward mounting, but is not compatible with Jeffsy frames. Construction and durability Made from aluminum alloy for long-lasting durability. It withstands the rigors of off-road riding and delivers dependable chain security. Key benefits at a glance - Improves chain stay and derailleur stability for confident shifting on rough terrain - Reduces the risk of chain drops during aggressive climbing, cornering, and rocky sections - Lightweight yet durable aluminum alloy construction for everyday trail use Compatibility - Compatible with E-Type derailleur systems - Not compatible with Jeffsy frames Use scenarios - Enduro and aggressive trail riding on rocky, high-torque sections where chain drops are likely - Wet or muddy off-road conditions where chain misalignment is a concern - All-mountain setups using E-Type derailleurs on bikes that are not Jeffsy, for reliable, quiet operation