PRAXIS Shimano BB30 73mm or 68mm Rubber Collet BB Instruction Manual

Shimano BB30/PF30 BB
73mm or 68mm Rubber Collet BB
For SHIMANO HOLLOWTECH II Cranks
Instruction Manual

SAFETY INFORMATION – READ BEFORE RIDE

Since specific tools and experience are necessary for proper installation, it is recommended that the product be installed by a qualified bicycle technician.
Read the service instructions of your crank carefully prior to installing the parts. Loose, worn or damaged parts may cause riding problems and serious injury may occur as a result. If installation and adjustments are not carried out correctly, the chain may come off and this may cause you to fall off the bicycle which could result in serious injury. Read
these instructions carefully, and keep them for later use.

• Ensure that your frame shell is clean. Remove any c-clips/bearings so frame shell is empty.
• Conversion BB – Make sure the black O-ring is on the Non-Drive Cup prior to pressing into Non-Drive side.
• Apply Anti-Seize to the drive cup threads and smooth taper area before installing.
• Before riding the bicycle, check that there is no play or looseness in the bottom bracket connection. Also, be sure to retighten the crankarms and pedals at periodic intervals.
• If you feel any looseness or ‘play’ in the bearings, the bottom bracket should be inspected/replaced.
• Be sure to read the instructions for your front chainrings/crank in conjunction with these service instructions.
• Do not wash the bottom bracket with high-pressure jets of water.
• For maximum performance, it is required to remove and periodically inspect/clean your Praxis Works bottom bracket.
• Parts are not guaranteed against natural wear or deterioration resulting from normal use.
• For any questions regarding methods of installation, adjustment, maintenance or operation, please contact a professional bicycle dealer or call Praxis Works.
• Praxis Works assumes no responsibility for damages or injury related to improperly installed components.

READ THE STEP-BY-STEP INSTRUCTIONS PROVIDED ON THE OTHER SIDE.

WARRANTY

• Praxis Works Bottom Bracket products are warrantied to be free from defects in materials or workmanship for two years after the original purchase. The warranty is non-transferable and valid to the original purchaser of the product only.
• Any attempt to modify the product in any way such as drilling, grinding or painting will void the warranty.
• This warranty is not valid for “abused” or neglected products, or products that are damaged by improper installation.
• If a defect is found, our entire liability and your sole remedy shall be, at our option, free repair or replacement of the Praxis product.
• Except as expressly required by law, Praxis Works shall not be held liable for any indirect, special, or consequential damages.

THIS WRITTEN EXPRESS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, IMPLIED OR EXPRESSED. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. For more information on warranty policy and instructions for completing a warranty claim, check out the Full Warranty Policy found at our website. www.praxis- works.com
Note: specifications are subject to change without notice. © JUNE 2021 by Praxis Works, LLC

Shimano BB30/PF30/OSBB Compatibility and Spec

CRANKSET| Compatible with SHIMANO HOLLOWTECH II
68mm for ROAD Cranks only – 73mm for MTB Cranks only
FRAME SHELL| Only for BB30, PF30, and Specialized OSBB frames 68mm or 73mm
FRONT DERAILLEUR| Braze-on, Clamp-on, or Direct Mount. No E-Type or BB Mounted Guides

REQUIRED TOOLS

• Headset Press Tool
• Two Shimano BB Tools
• Headset cup removal tool
• Anti-Seize Compound
• Waterproof Grease

Included Parts

Number| Part| Qty
1| Shimano Bearing Cover| 1
2| LEFT/NON-DRIVE Cup 24mm ID Bearing| 1
3| Width Tolerance 0-Ring| 1
4| Delrin PF Sleeve (used on PF30 frames)| 1
5| Orange Rubber Collet| 1
6| Black Plastic Compression sleeve| 1
7| RIGHT/DRIVE Cup 24mm ID Bearing| 1
8| Shimano Bearing Cover| 1

LEFT/NON-DRIVE 28mm I.D
Praxis Works, LLC 207 MCPHERSON ST. SUITE E. SANTA CRUZ, CA 95060
RIGHT/DRIVE 30mm I.D
www.praxis-works.com

BB CUP PREPARATION

NON-DRIVE/LEFT CUP

1. Make sure the Width Tolerance O-ring is on the Left/Non-Drive Cup. This is required to accommodate frame BB width variances
2. FOR BB30 – Remove PF Sleeve (not used with BB30). Apply a thin coating of anti-seize to both ends of the BB cup contact surfaces and the threads
3. FOR PF30 – Slide PF Sleeve on. Grease both ends of the PF Sleeve contact surfaces. Then put anti-seize on the inner threads

DRIVE/RIGHT CUP

1. Slide the Black Plastic Sleeve and then the Orange Rubber Collet onto the cup. This is critical to the function of your BB
2. Apply a thin coating of anti-seize to the Right/Drive cup threads
3. Apply a thin coating of grease to the outside of the Orange Rubber Collet and Black Plastic Sleeve

BOTTOM BRACKET INSTALLATION

1. Check to be sure the inside of your frame shell has no obstructions. There can be no screws or guides obstructing the BB from installing.
   With a press tool, GENTLY press the Left/Non-Drive cup into the frame’s Left/NonDrive side until Width Tolerance O-ring just BARELY touches the side of the frame
   

2. Start threading the Right/Drive Cup in CLOCKWISE with your BB tool. As it threads in, you will feel friction build as the Orange Rubber Collet expands inside the frame. This is normal. Grab your second BB tool at this point
   

3. TURN Right/Drive Cup UNTIL IT STOPS. With the 2nd BB tool, hold the Left/Non-Drive Cup in place while you tighten the Drive cup fully. The 2nd tool gives you leverage so you feel when the Drive cup bottoms out on the Non-Drive cup.
   The Drive Cup has a machined stop and by design, it MUST be tightened until it bottoms out on the Non-Drive cup. This precisely sets/stops the Collet expansion.

4. Dab some grease on the underside of the included Outer Seals, then place them over the bearings with the Praxis logo facing outward The BB install is now finished and you can install your crank

BB REMOVAL

1. Unscrew the Right/Drive Cup COUNTER-CLOCKWISE and remove. Use one tool to hold the Left side for leverage, and the other to unscrew the Drive cup.
2. Once the Drive Cup is removed, slide a headset cup removal tool through from the drive side and it will catch the outside edge of the Non-Drive cup
3. Carefully bracing the tool and frame, very gently hammer/tap the removal tool to push the Non-Drive Cup out of the frame

We recommend using a 1.5” headset cup removal tool (photo) as it has a wide stance

CRANK INSTALLATION

Please see CRANK instructions at www.praxiscycles.com/manuals
REFERENCE – FRAME BB SPECS

• YOU MUST VISUALLY INSPECT YOUR BB30/PF30 FRAME FOR OBSTRUCTIONS *

  • BB30 frames must be removable C-clips for Conversion BB to be able to press in.
  • Frame shells cannot have any inner shell obstructions that prevent BB from installing.
  • DO NOT Modify! If you are unsure of your specific frame shell, please contact your frame manufacturer.

EXAMPLE OF POTENTIAL OBSTRUCTIONS… These will prevent the Praxis unit from being installed.

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