TR12 Derailleur & Shifter Set

MSRP: $249.99

ThumbnailSKUStock Color PriceQuantity
TR12 Derailleur & Shifter Set - Black/Black DTTR1210 Out of Stock Black/Black
TR12 Derailleur & Shifter Set - Black/Silver DTTR1220 Black/Silver
TR12 Derailleur & Shifter Set - Black/Gold DTTR1230 Black/Gold

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SKU: TR12 Categories: , , , , , , Tags: , , ,


The TR12 and DH7 drivetrain systems are the result of an intimate development relationship with5x DH World Cup Overall Champion Aaron Gwin and his personal mechanic John Hall. From start to finish, this project has spanned more than two full years of conceptualizing this high-performance design.

“There are a wide range of bikes, riding styles and riders today. TRP has focused on specific segments to launch its new product. After the first two years working successfully with Aaron and John on brakes, we showed them our ideas for a new TRP shifter and derailleur. When we asked them if they wanted to become part of the development team, they immediately were open to shift their focus to drivetrain. Since then, they have been pushing and challenging us – which is why we like working with Aaron and John.” -Lance Larrabee, TRP Managing Director



Derailleur: 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 fiber cage & Upper link
• Extra wide parallelogram pivot
• Sealed cartridge bearings pulleys

Shifter: 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 fiber upper housing & advance lever position with brake lever
• Ball bearing equipped
• 12 speed
• Tool-free straight lace cable changes
• Rider adjustable home position of lower lever with a 40-degree range




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

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

• 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

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 ensures that an accurate adjustment can be made quickly and without special tools

All information subject to change

Tests & Reviews



Setup and Hall’s Hacks


For the last five years John Hall has been responsible for every bolt on Aaron‘s bike. He grew up working on his family’s ranch in South Dakota, where hard work is the norm. That said, he’s the first one to work smarter rather than harder. “You don’t want to be jacking around with all of the little things all the time, there are enough things on a race weekend,” says Hall. “You just want to be able to do a quick once over and ride.”

With this in mind, here are 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 an 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.”


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