2020 Trek Domane SLR/SL Service Manual

1. Install Common Components

A. Install and Adjust the Seatpost

Tools and Materials Required

• Saddle
• Seatpost
• Seatpost wedge and bolts
• Lower seal
• Long stem 5mm hex
• Torque wrench ?️

1. Remove any tape or rubber band from around the seatpost wedge prior to installation.

2. Install the lower seal into the bottom of the seatpost.

3. Insert the seatpost into the seatmast. Ensure the wedge is placed in the seatpost prior to insertion.

4. Tighten the bolt just until the seatpost and wedge are snug. Do not fully tighten yet.

5. Install the saddle. Ensure the clamp ear correctly fits the saddle rail shape.

6. To adjust the angle of the top of the saddle, loosen the rear pinch bolt, adjust the angle, then re-tighten the bolt.

For full seatpost insertion, you may need to remove the lower seal.

7. To adjust the fore/aft position of the saddle, loosen the side rail clamp bolt, slide the saddle, then re-tighten the bolt.

8. To adjust the seat height, loosen the seatpost clamp bolt, adjust the height, and re-tighten the bolt to the recommended torque value.

Use a long stem 5mm socket on your torque wrench to tighten the seatpost bolt. This improves fit and prevents wrench marks on the bike finish.

B. Install the Front Derailleur

1. Use the special carbon washer and bolt to install the front derailleur at the base of the front derailleur hanger. Tighten the bolt just until the derailleur is held. Do not fully tighten yet.

C. Install the Rear Derailleur

1. Install the rear derailleur on the rear derailleur hanger. Tighten to OEM torque specification.

D. Install the Chain Keeper

1. Install the chain keeper at the base of the front derailleur hanger. Torque the bolt to 3Nm.

2. Route and Install Brakes

A. Install Rear Brake in Frame

1. Refer to page 5 for correct housing locations at the head tube.

2. Remove the rubber grommet from the non-drive side chainstay.

3. Slip the grommet onto the brake hose and route the hose through the grommet hole.

4. Route the hose through the bottom bracket, up the down tube, and out the head tube.

5. Fit the grommet back into the hole in the chainstay.

6. Bolt the brake in place.

B. Install Front Brake and Brake Hose

1. Place the lower bearing on the fork race.

2. Route the hose through the fork access hole (non-drive side) and up through the hole at the back of the steerer tube.

3. Connect the brake to the fork. Tighten the bolt just until the brake is snug. Do not fully tighten.

3. Route Cables and Housings Through the Frame

A. Mechanical

Route Front Derailleur Housing

1. Route the front derailleur housing from the head tube, down through the down tube, and out the front derailleur hole at the base of the seat tube.

2. Insert the grommet onto the housing and place the housing in the stop on the front derailleur.

3. Set the grommet in place on the frame.

Route Rear Derailleur Housing

1. Route the rear derailleur housing from the hole in the chainstay, through the bottom bracket, up the downtube, and out the top of the head tube.

Diagram shows housing and hose locations at the head tube: 1. Front derailleur housing, 2. Rear brake hose, 3. Rear derailleur housing.

Install the Down Tube Cable Guide

1. Slide the cable guide into the down tube access hole and under the cables and hose.

2. Snap the cables and hose into the guide clips in the correct order and location (non-drive side to drive side): 1. Rear brake ?, 2. Front derailleur ?, 3. Rear derailleur ?.

3. Connect the cable guide to the frame using two bolts. Torque the bolts to 3Nm.

Install the Down Tube Window Frame

1. Install the window frame in the down tube storage hole.

Ensure the window frame tab is at the top of the storage hole.

2. Tighten the bolts to 1.2Nm.

3. Install the storage cover with the lever pointing to the drive side.

4. Refer to the Appendix for the procedure: Assemble and install the down tube storage door.

B. Di2

Route the Front Derailleur Cable

1. Connect the front derailleur cable to the front derailleur.

2. Place the cable through the grommet, into the hole at the bottom of the seat tube, and out the bottom bracket.

3. Set the grommet in place in the frame.

Route the Rear Derailleur Cable

1. Connect the rear derailleur cable to the rear derailleur.

2. Route the rear derailleur cable from the driveside chainstay hole to the bottom bracket hole.

Pro Builder Tip: Use the Park Tool IR-1.2 Internal Cable Routing Kit for assistance.

Route Battery and Install

1. Place the battery ? in the battery holder and cable guide.

2. Tighten the screws to 0.3Nm.

3. Connect the battery wire to the battery.

4. Route the battery wire in through the storage hole and out the bottom bracket hole.

5. You should now have three wires exiting the bottom bracket hole.

6. Slide the battery, wire, and cable guide assembly into the storage hole and under the brake hose.

7. Snap the rear brake hose into the non-drive side slot in the cable guide.

8. At the top of the head tube, hold the rear brake hose and move the guide down the downtube to align the guide holes with the holes in the bottom of the downtube.

Install the Down Tube Window Frame

1. Install the window frame in the down tube storage hole.

Ensure the window frame tab is at the top of the storage hole.

2. Tighten the bolts to 1.2Nm.

3. Install the storage cover with the lever pointing to the drive side.

4. Refer to the Appendix for the procedure: Assemble & install the down tube storage door.

Handlebar Cable Routing

Pro Builder Tips:

1. Use the Park Tool IR-1.2 Internal Cable Routing Kit for this installation.

2. For ease of cable routing, place the handlebar in a bike mount fixture.

4. Install the Fork

1. With the lower bearing installed on the fork, slide the steer tube and brake hose up through the bottom of the head tube.

2. Guide the brake hose out through the top tube cable hole.

3. Slide the steer tube through the IsoSpeed assembly.

Ensure the two brake hoses and the derailleur cable(s) are positioned in the top tube cable hole.

4. Install in order: Front IsoSpeed grommet, IsoSpeed spacer, upper bearing, split ring, and top cap.

5. Install the brow cover. Flex the sides of the brow cover outward, and position it over the top of the head tube.

5. Route and Install the Stem and Handlebar

Install the Stem

1. Install any desired headset spacers and the stem onto the steerer tube.

2. Align the stem and tighten the stem pinch bolts to the recommended torque.

Install the Handlebar

1. Snap the cable wrangler onto the handlebar. The location is important as the wrangler will sit in the stem.

Ensure the tabs on the wrangler line up with the spaces on the stem.

2. Place the handlebar in position on the stem and tighten the faceplate bolts to spec.

3. When the cable wrangler, stem, and handlebar are properly assembled, pulling on the cable loop should result in no movement between the clip and the handlebar.

There are different cable wranglers for different stems depending on Blendr compatibility (PNs: W582439, W584649, 600794).

Trek recommends using the cable wrangler on stems 100mm and longer. For stems shorter than 100mm, the cable wrangler does not provide additional benefit.

4. When properly assembled, the cable wrangler tab should not be visible at the bottom of the stem.

A. Mechanical

Connect the Brake Hose and Housing/Cables

Install the Top Tube Cable Guide

1. With the cable guide in the correct orientation, snap in the brake hoses first, then the derailleur cables. Drive side: Rear brake hose 〰️; rear derailleur cable ?. Non-drive side: Front brake hose 〰️; front derailleur cable ?.

Moto style routing will have the brake hoses swapped.

2. Slide the cable guide down into position in the top of the head tube hole.

3. Install the bolt and tighten to 1Nm.

B. Di2

Install the Top Tube Cable Guide

1. With the cable guide in the correct orientation, snap in the brake hoses first, then the Di2 wire ⚡. Drive side: Rear brake hose 〰️; Di2 wire ⚡. Non-drive side: Front brake hose 〰️.

2. Slide the cable guide down into position in the top of the head tube hole.

3. Install the bolt and tighten to 1Nm.

Install the Shift Levers

1. Route the hoses and wires (Di2) or cables (mechanical) through the cable wrangler.

2. From the wrangler, route the lines along the left and right sides of the handlebar.

3. Place the shift levers on the handlebar to the desired location.

4. Trim the brake hose and shifter housing to the proper length. The cable length should be sufficient to allow the bars to freely rotate +/- 60 degrees.

6. Domane Torque Specifications

7. Service Information

Di2 Handlebar Specifications for Reference

This wire length will change with respect to frame size, stem length, or bar width. All other wire lengths stay the same regardless of frame size.

Color Code (for drawing reference): REAR BRAKE = RED, FRONT BRAKE = DARK GRAY, Di2 WIRE = LIGHT GRAY.

8. Appendix

A. Install the Front IsoSpeed

1. Apply grease ? to the bore holes, inside face, and both sides of the head tube.

2. Place a washer over each bearing in the front IsoSpeed decoupler.

3. Pinch the Front IsoSpeed decoupler between two fingers to hold the washers, and carefully guide it into the cavity in the head tube until the holes align with the bore holes in the frame.

4. From inside the decoupler, insert a screw into the driveside bore hole so the screw points to the outside of the head tube.

5. Point the end of the elliptical nut with the chamfer towards the bore hole.

6. Place a finger inside the decoupler and push the screw towards the outside of the head tube.

7. Hand thread the elliptical nut a few turns to the LEFT to secure it. Do not grease the threads.

8. The elliptical nut is oval-shaped and matches the oval bore hole in the head tube. When hand tight, align the oval of the nut with the style line of the head tube.

9. Place one hand on the opposite side of the head tube (9a) and with the other, insert the torque key into the nut. Apply pressure with both hands until the nut seats into the head tube (9b). Then turn clockwise with firm pressure (9c) to draw the screw inside the head tube towards the nut. Turn until snug, do not fully tighten.

10. Repeat steps 4 through 8 for the other side of the decoupler.

11. Repeat step 9 for the other side.

12. To fully tighten, apply good pressure while turning the torque wrench. This prevents the bolt inside the decoupler from spinning and draws it towards the nut. Tighten to a maximum of 8Nm.

13. Repeat step 12 for the other side.

14. Check the decoupler for free movement after installation. If it does not move freely, loosen, clean connections, apply grease, and reinstall.

15. Lower the pre-load spacer into the decoupler so the label "BEARING" is on top and "SPRING" is pointed down.

There are flat sides that line up with the screws on either side of the decoupler.

Grease should not be applied to the IsoSpeed assembly except for the top chamfer where the upper bearing is positioned. Do not apply grease to the lower bearing, wave washer, lower split ring, or spacer.

B. Install the Rear IsoSpeed

1. Install the damper assembly in the seat tube. The damper orientation should be up.

2. Hold the damper assembly in place and install two M4 bolts. Tighten the bolts to 5Nm.

Ensure the damper adjustment screw is backed out.

3. Place the IsoSpeed grommet over the top of the seat mast.

4. Clean the surface with alcohol or degreaser and install the adhesive bumper on the forward end of the seat mast tongue.

5. Insert the seat mast into the frame.

6. Put the grommet in place in the frame.

7. Insert the pivot bolt, washer, wave washer, and nut on the non-drive side. IMPORTANT: The washer and wave washer must be on the bolthead side.

8. Torque the bolt to 8Nm. Use the torque wrench on the 8mm side, not the 6mm side.

9. Install the slider on the seat mast tongue.

10. Install the bolt and washer in the forward end of the decoupler and torque to spec as indicated on the decal.

11. Tighten the damper adjustment screw.

C. Assemble and Install the DT Storage Door

Parts Required:

• 1. Wave washer
• 2. Flat washer
• 3. Lever
• 4. Pin
• 5. Wings
• 6. Storage door
• 7. Screws (2)
• 8. Wing cover/Tool holder

1. Preload the pin in the wing.

Ensure the pin is not pressed into the hole in the middle of the wings.

2. Put the straight washer on the lever shaft.

3. From the inside, put the wave spring over the lever shaft.

4. Put the wing over the lever shaft with the wing ribbing visible.

5. Align the holes in the shaft and the wing with the lever in the closed position and the wing perpendicular to the water bottle line.

6. Press the pin through so it's flush with the wing.

7. Set the tool holder tab in the channel on the door.

8. Install and torque the two screws to 1Nm.

9. If equipped with a Bontrager multi-tool, push the tool into the holder from the non-notched side until it clicks into place.

10. To release the tool, push on the tool at the notch and pull up on the opposite side of the holder. Push the tool out at an approximate 45-degree angle.

D. Install the T47 Bottom Bracket

1. Grease ? the threads on the frame.

2. Start threading the bottom bracket into the frame by hand:

• Drive side: reverse threads (left hand thread)
• Non-drive side: regular threads (right hand threads)

3. Use the installation tool specific to your bottom bracket to torque the bracket to the OEM spec. Do not exceed a maximum of 50Nm.

E. Install Fenders

Install Front Fender

Tools Required

• 4mm hex head wrench, extended arm, round head
• Loctite Blue 242

Trek recommends using Bontrager fenders.

Domane SL, SLR, and LT Models

1. Remove the set screw or plastic plug from under the fork crown.

2. Remove the two bolts from the fender mounting tab and remove the tab.

3. If the top mounting bolt has been used before or the bolt has no adhesive, apply fresh Loctite Blue 242 to coat the threads.

The bolts included with your Bontrager fender will have Loctite pre-applied. The top mounting bolt should be a button-head type and at least 0.5in (12.7mm) long.

4. Use the bolt with Loctite to attach the fender to the underside of the fork crown.

5. Use the instructions that came with the fender to complete the installation.

Domane HP Models

1. Remove the set screw or plastic plug from the rear of the fork.

2. If the top mounting bolt has been used before or the bolt has no adhesive, apply fresh Loctite Blue 242 to coat the threads.

The bolts included with your Bontrager fender will have Loctite pre-applied.

3. Bend the fender tab as necessary to best fit the angle of the fork.

4. Use the bolt with Loctite to attach the fender to the rear of the fork.

5. Use the instructions that came with the fender to complete the installation.

Rear Fender Chart