SRAM DUB Cranksets and Bottom Brackets

Safety First!

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Safety Instructions

You must read and understand the Safety Instructions document included with your product before proceeding with the installation. Improperly installed components are extremely dangerous and could result in severe and/or fatal injuries. If you have any questions about the installation of these components, consult a qualified bicycle mechanic. This document is also available on www.sram.com.

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Highly specialized tools and supplies are required for the replacement and maintenance of your SRAM components. We recommend that you have a qualified SRAM dealer work on your SRAM components.

*PressFit 30 DH bottom brackets must use the crankset with the words DUB DH BSA/PF30/PF marked on the spindle.

SRAM DUB BB30 bottom brackets are compatible with frame shells with an inner diameter of 42 mm.

DUB PressFit 30 and BB386 bottom brackets are compatible with frame shells with an inner diameter of 46 mm.

DUB PressFit bottom brackets are compatible with frame shells with an inner diameter of 41 mm.

SRAM DUB BSA bottom brackets are compatible with frame shells with English threads.

SRAM DUB T47 bottom brackets are compatible with frame shells with M47 x 1 threads.

SRAM DUB Italian bottom brackets are compatible with frame shells with 36 mm x 24 tpi threads.

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 Crankset and Bottom Bracket table.

DUB PressFit 30 Spacer Chart

*PressFit 30 DH bottom brackets must use the crankset with the words DUB DH BSA/PF30/PF marked on the spindle.

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 non-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 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.

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.

To install and tighten the self-extractor cap only, perform steps 3-5.

1. Place the washer onto the crank bolt.

2. Install the crank bolt assembly.

3-4. Apply new threadlocker if not present. Use the Abbey Bike Tools Dub Self-Extracting Cap Tool (A) to install the self-extracting cap or use a 2.3 mm spanner (B). If the cap does not include spanner holes, use a 10 mm Hex Tool (C)*.

5. Tighten the self-extracting cap counter-clockwise to 14 N·m (123 in-lb) when using the Abbey Bike Tools DUB Self-Extracting Cap Tool (A), 10 mm Hex Tool (C)* or hand tight** when using a spanner (B).

Notice

The self-extracting cap is reverse threaded.

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