The new TR12 12-speed rear derailleur was developed in close collaboration with Aaron Gwin's racing mechanic John Hall, and so was one of the main features of the derailleur: the "Hall Lock". This lever is an on/off mechanism that prevents the rear derailleur from shifting up and down. When engaged, it gives the TR12 more stability, more composure and better shifting performance off-road. It can be disengaged for easier removal of the rear wheel.

The changer also has a type of friction brake: the ratchet clutch is characterized by clutch surfaces with a large diameter. These are said to be more wear-resistant and offer a constant braking effect, which reduces the flapping of the change arm.
The exciting thing is that the entire clutch force can be switched off using the on/off switch when a wheel change is required. The ratchet clutch is also adjustable and can be tuned to suit the suspension and riding style. For example, the clutch force can be reduced on bikes where the chain tension is greatly increased during compression.

The changer is made of aluminum as well as aluminum and carbon cage guide plates and is available in three colours. At 282 grams, it is in the same weight range as its XT and XO1 Eagle counterparts from Shimano and Sram. It shifts twelve gears on practically all commercially available cassettes up to 50 teeth.
Another clever detail on the TR12 changer is the "Chain Length Indicator". The indicator printed on the changer and cage helps to determine the exact chain length quickly and easily when reassembling.

Ergonomic gear lever

At the request of downhill star Aaron Gwin, TRP engineers developed the system so that the shifter can be operated more linearly by the thumb. This should improve shifting performance, especially in rough terrain
. The lever blades have embossed grooves for more grip and a better feel. And to make this perfect, the lower lever can be adjusted by 40 degrees.

The shift lever is made of aluminum and carbon and allows a tool-free cable change. At 120 grams, it is also in line with its competitors. However, the price of the set, consisting of changer and shifter, is ahead of the competition. From August 2020, this will be available from specialist retailers for just €299.

www.shiftingfocus.trpcycling.eu/tr12