PRAXIS M24 BB86 Bottom Bracket Instruction Manual
- June 3, 2024
- PRAXIS
Table of Contents
M24 BB86 ROAD BB90 MTN PRESS-FIT BB92 MTN
For Praxis M24 Road or MTN
Cranks and SRAM GXPTM Cranks
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 PF frame shell is clean and free of debris.
- 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.
M24 BB86 Bottom Bracket
WARRANTY
- Praxis Works Bottom Bracket products are warrantied to be free from defects in materials or workmanship for two years after 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 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. © AUG 2022 by Praxis Works, LLC Rev F
M24 BB86/90/92 Compatibility and Spec
CRANKSET| Compatible with Praxis M24 Based Cranks and SRAM GXP™ cranksets
BB86 for ROAD Cranks only – BB90/92 for MTB Cranks only
FRAME SHELL| BB86 ROAD Frames BB90/92 MTB Frames – 41mm Diameter Frame
Shell
FRONT DERAILLEUR| Braze-on, Clamp-on
REQUIRED TOOLS
- Bearing Press Tool
- Loctite 609 (Metal BB shell)
- Hammer
- Loctite Superflex Clear RTV (Carbon BB Shell)
- Park Tool BBT-30.4 Bearing Remover
Included Parts
Number| Part| Qty
1.| 22mm ID X 1.7mm Dust Cover| 1
2.| LEFT/NON-DRIVE 22mm I.D PF Bearing| 1
3.| RIGHT/DRIVE 24mm I.D PF Bearing| 1
4.| 24mm ID X 2mm Dust Cover| 1
5.| 24mm ID X 3.7mm Dust Cover| 1
6.| 24mm ID X 6.8mm Dust Cover| 1
7.| Wave Washer| 1
Praxis Works, LLC 207 MCPHERSON ST. SUITE E. SANTA CRUZ, CA 95060 www.praxis- works.com
FRAME & BEARING PREPARATION
METAL BB SHELL
- Clean the metal BB shell with solvent to remove any grease
- Use Loctite 609, 603, or 638 retaining compound
- Spread a thin coat of retaining compound around the metal BB shell and on the outer bearing race
CARBON BB SHELL BB
- Clean the carbon BB shell with solvent to remove any grease
- Use Loctite Superflex RTV Silicone Adhesive (Room Temp Vulcanizing)
- Spread a thin coat of the RTV Silicone around the carbon BB shell and on the outer bearing race
- Once pressed, it must cure for 24hrs before riding
Next page INSTALLATION…..
BOTTOM BRACKET INSTALLATION
- Press the 22mm ID bearing into the Left/Non-Drive side of the frame
- Then press the 24mm ID bearing into the Right/Drive side of the frame
- Wait 24hrs for silicone to cure if pressed into carbon BB shell
BB REMOVAL
Use Park BBT-30.4 Removal Tool or similar
- Using bearing removal tool, hammer out the Non-Drive Side Bearing from the inside out
- Using bearing removal tool, hammer out the Drive-Side Bearing from the inside out
Installation Notes
- Press all bearings using a professional press tool
- Press all bearings flush against the bottom bracket shell
- Press one Bearing/Side at a time!
CRANK INSTALLATION
Please see CRANK instructions at
www.praxiscycles.com/manuals
BB DUST COVER SETUP
REFERENCE – FRAME BB SPECS
BB DUST COVER GUIDE
ROAD M24| WIDTH| M24 CRANK| LEFT
22MM COVER| LEFT
CUP SPACER| RIGHT
CUP SPACER| RIGHT
24MM COVER
---|---|---|---|---|---|---
BSA| 68| ROAD OM
ROAD NON-OM SRAM ROAD GxP| 1 7rrm
1 7rr m
1.7mm| | | 2mm
2mm
2mm
T47 E. B.| 68| ROAD DM
ROAD NON•OM SRAM ROAD GxP| 1.7mm
1.7mm
1.7mm| | | 1mm
1mm
lmm
T47 I.B.| 86.| ROAD DM
ROAD NON-OM SRAM ROAD GxP| 1.7mm
1.7mm
1.7mm| •| | 1mm
1mm
1 mm
- BB86| 87.| ROAD DM
ROAD NON-OM SRAM ROAD GxP| 1.7mm
1.7mm
1.7mm| –| –
–| 2mm
2mm
2mm
BB30/PF30| 68| ROAD DM
ROAD NON-OM SRAM ROAD GxP| 1.7mm
1.7mm
1.7mm| –| •
–| 2mm
2mm
2mm
MTN M24| WIDTH| M24 CRANK| LEFT
22MM COVER| LEFT
CUP SPACER| RIGHT
CUP SPACER| RIGHT
24MM COVER
---|---|---|---|---|---|---
BSA| 68| GEN1 MTN DM
GEN1 MTN NON•DM
GEN2 MTN DM SRAM MTN GxP| 1.7mm
1.7mm
1.7mm
1.7mm| 2.5
2.5
2.5
2.5| | 2mm 3.7mm 3.7mm 3.7mm
73| GEN1 MTN DM
GEN1 MTN NONDM
GEN2 MTN DM SRAM MTN UP| 1.7mm 1.7mm 1.7mm 1.7mm| | | 2mm 3.7mm 3.7mm 3.7mm
T47 E.B.| 73| GEN1 MTN DM GEN1 MTN NON•DM GLN2 MTN DM
SRAM MTN GxP| 1.7mm 1.7mm 1.7mm 1.7mm| | | 1 mm 3.7mm 3.7mm 3.7mm
T47 I.B.| 89.5| GEN1 MTN DM
GLN1 MTN NON-DM
GLN2 MTN DM SRAM MTN GxP| 1.7mm 1.7mm 1.7mm 1 7mm| | | 2mm 3.7mm 3.7mm 3.7mm
BB90| 89.5| GFN1 MTN DM
GEN1 MTN NON•DM
GEN2 MTN DM SRAM MTN GxP| 1.7mm 1.7mm 1.7mm 1.7mm| | | 3.7mm 6.8mm 6.8mm 6.8mm
-,71i BB92| 92| GEN1 MTN DM GEN1 MTN NON•DM GEN7 MTN DM
SRAM MTN GxP| 1.7mm 1.7mm 1 7mm 1 ./mm| | | 2mm 3.7mm 3.7mm 3.7mm
BB30/PF30| 73| GEN1 MTN DM GFN1 MTN NON•DM
GEN2 MTN DM SRAM MTN GxP| 1.7mm 1.7mm 1.7mm 1.7mm| | | 2mm 3.7mm 3.7mm 3.7mm
“DM” = DIRECT MOUNT SPIDER (Removable Spider)
“NON-DM = NOT DIRECT MOUNT SPIDER (Pressed-On Spider)
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>