The 2011 G2 SL is the most advanced, engineered, and amazing chain guide on the market. The G2 SL utilizes everything great about the preceding G2 guide, but in a lighter design with greater frame clearance and much easier installation and setup than ever before. Three years of experience with the G2 guide has given MRP the opportunity to find every possible place to reduce weight while maintaining or increasing strength of the system. Every single part of the G2 SL is new except for the sealed bearing pulley wheel on the lower guide.