G-Spec Tr12 Derailleur And Shifter Kit Black

Pickup available at 132 Union Road

Usually ready in 4 hours

View store information


The new TR12 rear derailleur is able to provide a quiet and accurate ride over the roughest trails. The key feature to this pursuit is the Hall Lock. During the Race season, lead mechanic for Intense Factory Racing, John Hall, noticed excessive movement around the b-knuckle when riding over rough rock gardens and in tracked out corners. This was leading to more chain skipping and slapping creating possible variances in shifting. This inspired John’s idea to lock the B-knuckle to the bike’s derailleur hanger. TRP engineers worked closely with Hall to create this feature, The Hall Lock.

  • Hall Lock
  • G-Spec Ratchet Clutch
  • G-Spec finishing touches:
  • Carbon fibre cage & Upper link
  • Extra-wide parallelogram pivot
  • Sealed cartridge bearings pulleys

The TRP TR12 derailleur is designed to work best with 11-50T 12-speed cassettes.

TRP state that the TR12 rear derailleur works best with the Sram PG-1230 NX Eagle 11-50 cassette for HG freehubs and that it also works very well with Sram XG-1275 GX Eagle, Sram XG-1295 X01 Eagle, and Sram XG-1299 XX1 Eagle 10-50T cassette for XD Drivers.

TRP claim that the TR12 rear derailleur works well with Shimano XTR CS-M9100, Shimano XT CS-M8100, and Shimano SLX CS-M7100 10-45T cassettes for MicroSpline freehubs.

TRP note that the TR12 rear derailleur works with SunRace MZ90, SunRace MZX0 11-50 HG *, SunRace MZ91X 10-50T XD Cassettes as well as e*thirteen TRS+ 9-46 XD and e*thirteen TRS+ 9-50 XD cassettes.


Ergonomics are key to Aaron, which is why he wanted something a little different. As a result, TRP engineers looked at the cable release lever’s ergonomics and devised a system to move it in a linear path to mimic the motion of a rider’s thumb, rather than rotating it away. This unique positioning allows for a more consistent contact patch providing overall better grip and shifting performance when the trail gets rowdy.

  • Shift levers designed and located for optimum performance by Aaron Gwin
  • New linear actuation for improved ergonomics and consistent thumb contact
  • Enhanced grip & tactile feel built into lever paddles: embossed grooves on advance and release lever
  • Carbon fibre upper housing & advance lever position with brake lever
  • Ball-bearing equipped
  • 12 speed
  • Tool-free straight lace cable changes
  • Rider adjustable home position of the lower lever with a 40-degree range

Hall Lock:

TRP engineers worked closely with John Hall to create the Hall Lock. A Lever integrated into the B-knuckle mount, which can be opened or closed, as needed. For working on the derailleur or changing the wheel, the Hall Lock is opened. When locked, the derailleur is stabilized for the roughest conditions. This feature helps maintain the utmost accuracy in shifting and superb chain retention. Its clamping force can be adjusted to balance stability and security with the derailleur’s ability to deflect on impact.

  • Hall Lock is an on/off feature with adjustable force that brings TRP’s derailleurs the utmost stability, accuracy, chain retention and quietness in operation for mountain biking’s roughest conditions
  • It can lock-out the main pivot bolt to prevent your derailleur from lifting, slapping and making noise
  • You can set it up however you like – if you want maximum stability you can lock it; if you like it to move like a standard derailleur you can adjust it to do so

Ratchet Clutch:

The second derailleur feature is a ratchet-style clutch, which is adjustable. Depending on a full-suspension bike’s design, there can be enough chain growth to feel resistance from the clutch. If a rider wants to free up the system up, he or she can back off the clutch to balance pedal feedback with the clutch’s chain retaining properties.

  • Large diameter clutch surfaces for wear resistance and predictable force generation
  • Oversized friction surface area for consistent force output
  • Adjustable clutch force provides a wide range of customizable ride tuning and compensation for wear
  • Quick and easy on/off switch removes all clutch force when needed for wheel changes
  • Robust pawl engagement

Chain Length Indicator:

  • Indicators printed on the knuckle and the cage for easy viewing
  • This marking helps ensure a quick and accurate measure of the system’s required chain length

Set-Up Aids:

Shop mechanics and home wrenches both will appreciate when components can be set up quickly and smart. Saving time for set-up and providing an easy check for assurance.

  • Marking aids help mechanics and riders in setting up the B-Adjustment gap and ensure that an accurate adjustment can be made quickly and without special tools

John Hall’s TRP derailleur hacks:

Ratchet Clutch:

You shouldn’t need to adjust the TRP ratchet clutch when it’s new. “More times than not, I will wait until the clutch is worn before I make an adjustment to tighten it up. The factory setting is perfectly fine.”

Hall Lock:

Alert – Always have the Hall Lock lever open when installing the derailleur; working on it or changing the wheel – thank you.

Out of the box the Hall Lock is loose and should be adjusted. “After I have installed the derailleur and get everything adjusted. I tighten the set screw to the point where it stops itself,” says Hall. “I want it to be as tight as it can be, while still being able to operate the Hall Lock lever with my fingers. That seems to be a really good spot. It keeps everything good and tight and the noise down, but when it takes a hit from a rock it doesn’t have so much tension that it can’t move out of the way.”

Proper Chain Length:

When sizing the chain, John suggests that you, “Run the chain around the smallest cog on the cassette through the derailleur and then use the closest link that adds a little bit of pressure onto the clutch.”

Lock Adjustments:

When using the Clutch and Hall Lock adjustments, less is more – “The smaller you make your adjustments the better,” says Hall. “If you think you need to do a 30-degree turn, do a 15 degree of a turn, especially on the clutch because there are two screws that you adjust, so when you do a 15 degree of a turn on each, that essentially turns into a 30 degree of a turn on the whole system, which is a lot. Out of the box, you shouldn’t have to adjust it. The only time you want to touch it is as it wears—you can bring it back to life by adding a little bit of tension, which just extends the longevity of your whole clutch system.”

Reset Hall Lock:

What can go wrong? Reset the Hall Lock after an impact – If you crash or you hit your TRP derailleur on a rock when riding the Hall Lock is meant to move, even if it’s engaged, in order to prevent catastrophic damage to the derailleur. If this happens, it’s important to take an extra step before you jump back on and ride. “Always be sure to release the Hall Lock and allow that derailleur B-screw to drop back down to the B-plate before you turn your Hall Lock back on,” says Hall. “In this rare scenario, if you just push your derailleur back into place with the Hall Lock on, you can actually loosen that derailleur mounting bolt. We may talk about this a lot, but I’ve actually never hit this derailleur hard enough to push it off the B-plate. It’s just one of those things to know, in the rare case it does happen, that you don’t want to just shove your derailleur back down without turning the Hall Lock off.”

Only 1 left in stock!

Customer Reviews

Be the first to write a review

Related Products...