Jab Derailleur Compatibility

One of the main features of the Madrone Jab derailleur is its ability to be compatible with many modern drivetrains!

All the Jab derailleurs use the same "base" assembly. From there, the configuration options are:

  1. Cam type. The derailleur uses 1 cable cam, which converts shifter cable pull to cassette spacing.
  2. Cage type. Cage options allow us to support a variety of 1x gearing ranges.
  3. Mounting type. There are 3 different mounting types: conventional, UDH with stiffener plate, and T-Type.
  4. Barrel adjuster. If you are using MTB shifters, you do not need the barrel adjuster option. If you have gravel/road shifters, you do need the barrel adjuster.
  5. Color. We will always offer a silver and black option, as well as a couple others depending on what is popular at the time.

Let's get into the details...

Cable Cam Options

We plan to offer as many cam options as possible. We will prioritize releasing cams for the most common drivetrains first, which means SRAM and Shimano 12 and 11 speed MTB and gravel/road configurations.

For less common drivetrains, such as alternate cassettes (i.e. e13, Garbaruk, mismatched shifter/cassette combos) 10 speed, 9 speed, Campagnolo 1x, we also plan to release cams, but the release will be delayed. We will do this so you do not have to settle for less than perfect shifting. Of course, the cassette shift ramps affect shifting performance, so we cannot affect that aspect.

Cage Options

There are 3 cage options for the 1x Jab:

  • Long Cage
    • Maximum cassette tooth count: 52 teeth.
    • Pulleys: 12T upper, 14T lower.
    • Typical usage: 1x MTB, eMTB, wide range 1x gravel.
  • Short Cage
    • Maximum cassette tooth count: 44 teeth.
    • Pulleys: 12T upper, 14T lower.
    • Typical usage: 1x gravel, narrow range 1x MTBs.
  • DH Cage
    • Maximum cassette tooth count: 25 teeth.
    • Pulleys: 12T upper, 12T lower.
    • Typical usage: Downhill and freeride.

Mounting Options

There are 3 mounting options...

  1. Conventional. The Jab can mount to any conventional or UDH derailleur hangar using the M10x1 threaded hole.
  2. UDH with stiffener plate. We also offer an option for an eternal plate that pairs with a UDH hangar to add strength and stiffness to the mount, similar to direct mount derailleurs. This option does not work with T-Type cassettes though (see next option).
  3. Modified UDH with stiffener plate (for T-Type cassettes). For T-Type cassettes, we offer a modified UDH mount and stiffening plate, adding strength and stiffness to the mount, similar to direct mount derailleurs. As an added bonus, drivetrain hackers will appreciate that our modified UDH mount will allow SRAM Eagle derailleurs (AXS or cable actuated) to be used with T-Type cassettes.

Barrel Adjuster

A barrel adjuster is necessary for adjustment of any derailleur. MTB shifters have barrel adjusters integrated, but gravel and road shifters do not, so the barrel adjuster is part of the derailleur on gravel or road bikes. There are 2x2 configurations for the Jab derailleur:

  1. Without barrel adjuster. Select this if you are pairing the derailleur with a MTB shifter. This configuration has 2 cable routing paths to accommodate a range of MTB frames.
  2. With barrel adjuster. Select this option if you are pairing with a gravel or road shifter. This configuration has 2 cable routing paths to accommodate a range of gravel and road frames.

Chains

  • The derailleur is compatible with 12, 11, 10, 9, and 8 speed chains, including T-Type chains and flat-top chains.