Clean your workbench and lay out the parts from your e*thirteen TRS+ 12s Upgrade Kit.

Put your bike in a work stand and perform the following steps:

Shift the bike into it's hardest gear. Push the derailleur cage forward and lock in place.

Remove the following items from the bike, clean thoroughly and set aside: 11s rear shifter, rear shifter cable and housing, rear wheel, chain and rear derailleur.

Remove the cassette from the rear wheel.

Using the 3mm hex key, remove the cap screw located in the center of the cap. Remove the cover from the shifter and set the parts aside.

Click the release lever to verify the shifter is in the hardest gear, then remove the old shift cable from the shifter.

For X1™ and GX™ shifters - Move on to next step.

For XO1™ shifters: Flip shifter over and remove the large shifter paddle using a 3mm hex key. Set parts aside for reinstall later.

Push the cable out, remove from the shifter and recycle.

We will now remove the 11 speed spool & ratchet from the shifter.

While holding the shifter body and assembly together with one hand, remove the three 2.5mm hex screws from the underside of the shifter. Set aside within easy reach.

Remove the Black plastic inner cover from the top of the shifter assembly, exposing the spring and spool. Set the inner cover aside.

Flip over the shifter, and position the 3 prongs on the claw fixture into the recessed couterbores of the 3 screws you removed in the last step, while continuing to pinch the shifter assembly and body together.

From the top of the shifter, thread in the 3 screws you removed in the last step; entering the top of the shifter, thru the body and into the claw.

Remove the wound shifter spring by gently pulling up on the extended unwound portion and pulling it out from under the retaining tab.

On the underside of the shifter, insert the T25 key thru the hole in the middle of the claw and into the T25 pivot bolt in the center of the bottom of the shifter. On the top of the shifter, insert the 4mm into the screw in the center of the spool. The shifter should now be captured between your 4mm hex and your T25 torx.

Hold the shifter/claw assembly and T25 tool stationary in your hand, then turn the 4mm hex counterclockwise to extract the spool and ratchet from the shifter. Remove the 4mm screw with the 11s spool assembly and set aside.

Identify the correct ratchet for your system. X1™/GX™/XO1™ ratchet has 1 dot mark, XX1™ ratchet has 2 dot marks.

Apply a light layer of grease to the new bearings, spool, ratchet, and washer (if necessary). Install the ratchet onto the spool by aligning holes on ratchet with matching section on spool.

Insert the 4mm screw thru the bearing, spool & ratchet. For X1™/GX™/XO1™ next install the thin washer that came with your 12 speed kit.

Install the spool sssembly onto the shifter. Locate the spool as shown when you press it down onto the shifter. You should be able to see the lever pawl through the small window in the spool.

While holding the T25 torx key in the underside of the shifter pivot bolt, tighten the 4mm hex key to draw the new 12s spool & ratchet onto the shifter. Torque to 2nm or stop +30 degrees

With the main pivot bolt securing the shifter, you can now remove the three 2.5mm hex screws holding the shifter together against the claw.

Reinstall the spring starting from the center: First locate the protruding tip of the inner coil into the corresponding hole on the spool. With the tip in place, gently pull the first inner coil over the retention tab.

Insert the tip of the unwound portion of the spring into the notch cast into the shifter body

Replace the inner cover with the barrel adjuster on the shifter.

While holding inner cover in place, flip shifter over and reinstall the three 2.5mm hex screws into the bottom of the shifter. Torque to 1Nm or or 10 deg past snug.

If performing the upgrade on a XO1™ shifter, reinstall shifter paddle and 3mm hex screw which was removed in the first step. If you are working on an X1™ or GX™ skip to the next step.

Install the new shifter cable provided with the kit and give the larger thumb paddle a few clicks while watching the ratchet turn to ensure everything is functioning properly. Use the smaller paddle to click back down into the relaxed postion.

When function is confirmed, reinstall outer shifter cover and now move forward with the cassette install, derailleur pulley spacer install or adjusting your derailleur if those steps have already been completed.