SRAM Tool Rear Derailleur Chain B-Gap Gauge Eagle V2 50T-52T AXS & Mech Ships within Australia In stock. Available via Click and Collect or Buy Online Share Loading Facebook Like button... SRAM Tool Rear Derailleur Chain B-Gap Gauge Eagle V2 50T-52T AXS & Mech Ships within Australia In stock. Available via Click and Collect or Buy Online Share Loading Facebook Like button...