General description The Laser Tools LTR Chain Keeper Tool 8199 is designed to fix onto the drive side of the frame in place of the rear wheel, effectively keeping the chain tensioned and held away from the frame. This tool features a roller that allows the cranks to be rotated, making it ideal for cleaning the chain and derailleur. It serves as a dummy hub to replace the rear wheel. Technical specifications Fits frames with open dropouts Compatible with 9mm rear axle Quick-release fitting Usage Chain cleaning Maintenance tasks Transportation of the bike Other information Thru Axle version also available (Laser Part No. 8200)