Ensure your rear derailleur is fitted properly, bolted properly and not waiting to be damaged. This tool is just what you need to service and assemble up your bike properly. The Toopre alignment gauge tool is easy to use and allows you to measure how perpendicular the derailleur hanger is to the rear hub axle.
SPECIFICATIONS
Size: See photo
Weight: Approx 392.5g
Material: Aluminium Alloy + Stainless Steel