Park Tool FR-5.2GT Cassette Lockring with Tool 12mm Pin

I had to remove my rear cassette to upgrade my hub on my Shimano 11-34 GRX, and no other tool would fit. Soviet-era tough, just like every other Park Tool item. Fits perfectly in the largest of their sockets, and with the torque wrench, it now has the correct tightness of fit down to the Nm rating on the gears. If you like tinkering with your bike, and saving money on maintenance, this is a great addition to your kit. Happy riding.

This is a handy tool for mountain bikers.

Ive been using old Park cassette tool for QR axles and although it works, the tool was always getting cocked sideways in the lock ring since it was made for a quick release skewer. This tool works great for my 12mm thru axles and stays nice and square to the lock ring. One note, I always used a 24mm socket with my old tool but this new requires a 1 socket, the 24mm was too small.

Takes cassettes off and puts them on. Buy it

Lock ring got chewed up

Use it on my cassette and one up EDC steer tube tool

Works as it should

Nice tool!

Does as its supposed to and the color is very nice.

How did I ever get by without one of these?