Apex 1x12

Click on the icon at the top right corner of the screen to display the color legend and the complete list of tools and supplies for this manual in a scrollable dropdown list.

The colors and symbols featured in this manual correspond to specific actions or procedures. A detailed description for each color and symbol is contained in the dropdown.

¹ If riding styles conflict, it is up to the user to size up or size down based on necessary braking power.

² Road, Gravel, Cyclocross -- Consult the fork or frame manufacturer’s specifications before installing a 140 mm or 180 mm rotor. These rotor sizes have compatibility limitations on many forks and frames.

³ E-bikes -- Consult the appropriate riding style column and select rotor size based on system weight.

1. Align the rotor with the laser-etched markings facing away from the hub and install new, threadlock-prepped rotor bolts.

2. Tighten the rotor bolts one turn in an alternating sequence.

1-2. Install the rotor, tapered side first, onto the hub splines.

3. Install the center locking mechanism (not included) over the disc rotor, thread it into the hub, and tighten to the torque specified by the locking mechanism's manufacturer. If using a Zipp lockring, use a Ø44 16-notch external bottom bracket tool to tighten the lockring to 40 N·m (354 in-lb).

If required, install a 1.85 mm cassette spacer as indicated by the chart.

*XS, XG, and PG call out different types of cassette construction. Identify your cassette and driver body type for spacer information.

**PG-720 DH cassette: If your cassette has a Spoke Guard Spacer, consult the PG-720 installation section.

1. Apply grease to the driver body threads.

2. Install the cassette onto the driver body until it is fully seated and the splines are engaged. Use a tool with a guide pin to tighten the cassette while applying inward pressure to the cassette.

3. Use a torque wrench to tighten the cassette.

1. Apply grease to the driver body threads.

2. Install the cassette onto the driver body until it is fully seated and the splines are engaged. Use a tool with a guide pin to tighten the cassette while applying inward pressure to the cassette.

3. Use a torque wrench to tighten the cassette.

1. Apply grease to the driver body threads.

2. Install the cassette onto the driver body. Ensure the small spline of the cog is aligned with the small spline on the driverbody. Use a tool with a guide pin to tighten the cassette while applying inward pressure to the cassette.

3. Use a torque wrench to tighten the cassette.

Spray isopropyl alcohol on the bottom bracket shell and clean it. The shell should be free of dirt, paint, grease, and metal burrs. For best results, have your frame faced by a professional bicycle mechanic.

1. Apply grease to the inside of the frame shell.

2. Prepare the bottom bracket for installation. Remove the left side cup from the center tube. Remove the left side outer spacer, if applicable. Remove the right side outer spacer from the right side cup.

1. Install the inner non-drive side spacer if indicated by the chart.

2. Use a 12-notch external bottom bracket tool to tighten the non-drive side cup into the frame.

3. Install the left external spacer as indicated by the spacer chart.

4. Install the inner drive side spacer if indicated by the chart.

5. Use a 12-notch external bottom bracket tool to tighten the drive side cup into the frame.

6. Install the right external spacer as indicated by the spacer chart.

DUB BSA Spacer Chart

1. Use a bottom bracket bearing press tool or a headset press to install the left side cup into the non-drive side of the frame according to the tool manufacturer's instructions.

2. Repeat the installation with the right side cup and center tube into the drive side of the frame.

3-4. Install the spacer(s) according to the MTB Crankset and Bottom Bracket table.

DUB PressFit 30 Spacer Chart

DUB BB30 Spacer Chart

DUB PressFit Spacer Chart

1. Use a 16-notch external bottom bracket tool to tighten the non-drive side cup into the frame.

2. Install the left external spacer as indicated by the spacer chart.

3. Use a 16-notch external bottom bracket tool to tighten the drive side cup into the frame.

4. Install the right external spacer as indicated by the spacer chart.

DUB T47 Spacer Chart

1. Use a bottom bracket bearing press tool or a headset press to install the left side cup into the non-drive side of the frame according to the tool manufacturer's instructions.

2. Use the included BB386 installation tool to install the right side cup and center tube into the drive side of the frame.

3. Remove the BB386 installation tool.

4. Install the spacer(s) according to the chart.

DUB BB386 Spacer Chart

1. Use a 12-notch external bottom bracket tool to tighten the drive side cup into the frame.

2. Install the left external spacer as indicated by the spacer chart.

3. Use a 12-notch external bottom bracket tool to tighten the non-drive side cup into the frame.

4. Install the right external spacer as indicated by the spacer chart.

DUB Italian Spacer Chart

1. Apply grease to the indicated areas on the spindle.

2. Install the non-drive side crankarm and spindle into the bottom bracket. Make sure the blue o-rings remain installed in the gland in the left and right bottom bracket cups during spindle installation.

3. Install the drive-side crankarm onto the spindle.

4. Use a torque wrench with an 8 mm hex bit socket to tighten the crank arm bolt to 54 N·m (478 in-lb).

5. Use a rubber or plastic mallet to tap the drive side crank arm until it is fully seated.

6. Remove play from the system by turning the preload adjuster in the + direction until it stops or makes contact with the bearing shield.

7. Use a 2 mm hex wrench to tighten the bolt until the adjuster edges touch.

8. Check the crankset for play by rocking the crankarms back and forth.

9. Apply grease to the crank arm pedal threads.

10. Install the washer between the crank arm and pedal.

11. Tighten the pedal shaft to 54 N·m (477 in-lb) unless otherwise specified by the pedal manufacturer.

1. Use an 8 mm hex wrench to loosen the crank arm bolt.

2. Remove the drive side crankarm.

3. Use a rubber or plastic mallet to lightly tap the spindle from the drive side.

4. Remove the crank arm.

5. Loosen the bolt until the preload adjuster will rotate. Do not exceed a 1 mm gap.

6. Rotate the preload adjuster in the opposite direction of the adjuster arrow until it stops or makes contact with the crankarm.

Press the shifter paddle slightly to move the rear derailleur outboard to a smaller cog.

Press the shifter paddle further to move the rear derailleur inboard to a larger cog.

Press further for multiple inboard shifts.

1. Install the shift-brake lever onto the handlebar in your desired position.

2. Fold the hood cover forward to expose the clamp bolt.

3. Tighten the clamp bolt.

4. Install the shifter housing into a 4 mm ferrule.

5. Route the housing to the handlebar using the channel in the shifter.

1-2. Adjust the reach on the shift paddle first, then adjust the brake lever until the brake lever bumper contacts the shift paddle. This will ensure the brake lever does not interfere with the return action of the shifter paddle.

For fork and frame specifications that require a bolt-on bracket, install the bracket in the orientation for your caliper configuration.

1. Remove the pad spacer from the caliper.

2. Install the appropriate mounting bracket onto the brake caliper for fork and frame specifications that require a bolt-on bracket.

3. Tighten the bolts.

Caliper installation, centering, and torque is the same for all flat and post mount calipers, with or without a bracket, post, or spacer.

1. Loosely install the caliper onto the fork or frame.

2-3. Lightly squeeze (approx. 4 lbs.) the lever blade repeatedly to advance the caliper pistons, then hold the lever blade and lightly tighten the bolts.

4. Check that the brake pads are equally spaced on either side of the rotor.

5-6. Lightly squeeze (approx. 4 lbs) and hold the brake lever, and then tighten the bolts to the torque specified.

If the brake pads rub on the rotor, loosen the caliper bolts and adjust the caliper position. Repeat steps 2-6.

1. Thread the mounting bolt into the derailleur hanger.

2. Align the center of the upper guide pulley with the outboard edge of the smallest cog.

• Turn the limit screw counter-clockwise to move the derailleur further outboard (away from the wheel).

• Turn the limit screw clockwise to move the derailleur more inboard (closer to the wheel).

3. Measure and cut a length of derailleur housing so that there are no tight bends when installed into the frame and derailleur. Install a ferrule onto the housing.

4. Install the housing into the frame and derailleur.

5. Set the shifter to the furthest outboard position.

6. Turn the barrel adjuster clockwise until it stops (6a), then turn it counter-clockwise one full rotation (6b).

7. Route the cable through the housing, then through the derailleur and clamp groove.

8. Pull the cable taut, then tighten the anchor bolt.

9. Install a cable end cap on the cable.

10. Shift the rear derailleur inboard to the largest cog.

11. Align the center of the upper guide pulley with the center of the largest cog.

• Turn the limit screw counter-clockwise to move the derailleur more inboard (closer to the wheel).

• Turn the limit screw clockwise to move the derailleur further outboard (away from the wheel).

1. Wrap the chain around the large chainring and largest cassette cog.

2. Add two inner links and two outer links where the chain starts to overlap.

3. Use a chain breaker tool to break the chain at the inner link.

4. Move the chain to the smallest cassette cog.

5. Rotate the derailleur cage forward and press the Cage Lock lock button to lock the derailleur in the extended position.

6. Route the chain through the derailleur pulleys. Make sure to route the chain below the tab in the cage.

7. Pull each end of the chain together and install the PowerLock.

8. Press the PowerLock connector links together.

9. Release the Cage Lock by rotating the cage forward then carefully letting it return to the unlocked position.

10. Rotate the crank until the PowerLock is above the chainstay.

Check that the two halves of the PowerLock are properly aligned.

11. Apply the rear brake and (12) firmly push the crank arm down to lock the PowerLock. You should hear and feel the PowerLock click into place.

13. Check the PowerLock by hand to make sure it moves freely.

Use the tool designed for your drivetrain along with the following directions to set the optimal chain gap. If you do not have a tool, proceed to the Chain Gap Adjustment without a Gauge section.

XPLR: Use the XPLR Chain Gap Adjustment tool.

Apex Eagle: Use the Eagle Chain Gap Adjustment tool.

1. Shift the rear chain to the 2nd-largest cog.

2. If you have a dual-sided chain gap adjustment gauge, place the gauge onto the upper pulley so that "XPLR" is up, with the top half of the gauge behind the largest cog.

3. Turn the B-Adjust screw until the appropriate gap between the upper pulley and the tallest teeth of the largest cog is attained, according to the image caption.

Remove the tool.

Measurements are the same if you do not have a chain gap adjustment tool. Refer to the "CHAIN GAP ADJUSTMENT WITHOUT GAUGE" section for instructions.

1. Shift the chain into the second largest cog (42T).

2. Snap the chain gap adjustment gauge onto the largest cassette cog (52T or 50T) so the largest cassette cog teeth touch the surface of the gauge in the window cut-out.

3. Rotate the gauge and the cassette until the ledge on the back of the gauge contacts the upper pulley wheel.

4. Rotate the B-Adjust screw until the center of the upper pulley screw and the tip of the pointer on the chain gap adjustment gauge tool align (5).

Remove the tool.

1. Shift the chain onto the second largest rear cog.

2. Rotate the B-Adjust screw until the gap between the upper pulley and the tallest teeth of the largest cog achieves the required value.

1. Shift the rear derailleur outboard to the smallest cog.

2. Align the center of the upper guide pulley with the outboard edge of the smallest cog.

• Turn the limit screw counter-clockwise to move the derailleur further outboard (away from the wheel).

• Turn the limit screw clockwise to move the derailleur more inboard (closer to the wheel).

3. Shift the rear derailleur inboard to the largest cog.

4. Align the center of the upper guide pulley with the center of the largest cog.

• Turn the limit screw counterclockwise to move the derailleur more inboard (closer to the wheel).

• Turn the limit screw clockwise to move the derailleur further outboard (away from the wheel).

Slow shifting from a larger cog to a smaller cog (outboard shifting)? Turn the derailleur barrel adjuster clockwise in 1-click increments until shifting is correct.

Slow shifting from a smaller cog to a larger cog (inboard shifting)? Turn the derailleur barrel adjuster counter-clockwise in 1-click increments until shifting is correct.

All new brake pads and rotors should be put through a wear-in process called 'bed-in'. The bed-in procedure, which should be performed prior to your first ride, ensures the most consistent and powerful braking feel along with the quietest braking in most riding conditions. The bed-in process heats up the brake pads and rotors, which deposits an even layer of brake pad material (transfer layer) to the braking surface of the rotor. This transfer layer optimizes braking performance. To watch a video of the bed-in procedure, visit: SRAM: Disc Brake Bed-In Procedure.

1. Accelerate the bike to a moderate speed, then firmly apply the brakes until you are at walking speed. Repeat approximately twenty times.

2. Accelerate the bike to a faster speed, then very firmly apply the brakes until you are at walking speed. Repeat approximately ten times.

3. Allow the brakes to cool prior to any additional riding.

4. After the bed-in procedure has been performed, the caliper may need to be re-centered.

Always maintaining a clean and lubricated drivetrain will help extend your system performance and product component service life significantly.

It is recommended that you clean your chain, cassette, and chainring after frequent use, and immediately after riding in muddy, dusty, or other adverse conditions.

Use only biodegradable non-acidic cleaners to clean the cassette, chainring, and chain. Rinse thoroughly with water and wipe dry with a rag or blow dry with pressurized air.

Lubricate the chain with a dedicated chain lubricant. Wipe off excess lube.

Replace your chain before 0.8% elongation to maintain performance and limit wear to the cassette and chainring.

Apex Eagle: Orient a new pulley so the etched letter is facing outboard. The upper pulley is marked with a U and the lower pulley is marked with an L.

Reinstall the spacers with the flat sides facing outward.

Apex XPLR: Orient a new pulley so the etched letter is facing inboard. The upper pulley is marked with a U and the lower pulley is marked with an L.

Reinstall the spacers with the flat sides facing outward.

Inspect the crankset and bottom bracket for play, and tighten as needed. Clean the crankset and bottom bracket with water and mild soap.

Replace the bottom bracket when it no longer rotates smoothly.

Consult the Chainrings and Spiders User Manual on www.sram.com for complete torque specifications.