Shimano Tools|RD-RX820 GG Adjustment Gauge (12 Speed)

Shimano RD-RX820 GG Adjustment Gauge Description:

Don’t just guess, use the GG Adjustment Gauge to properly set the correct gap between the upper pulley guide wheel and the cassette for flawless shifting. Designed to work with 12-speed Shimano gravel and road rear derailleurs. The round cut-out is perfect for hanging on the home shop peg board, so you know exactly where you left it.

Features:

• Aids is setting the proper distance of the upper guide wheel to the cassette
• Experience shifting the way Shimano engineers intended
• For use with road and gravel 12-speed rear derailleurs

Compatible with the following Shimano rear derailleurs:

• RD-R7100
• RD-R7150
• RX-820