PRAXIS M30-THRU MTB Crank Instructions
- June 3, 2024
- PRAXIS
Table of Contents
PRAXIS M30-THRU MTB Crank
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.
- Be careful not to let your clothing get caught in the chain while riding, otherwise you may fall off the bicycle. Check that the tension of the chain is correct and that the
- chain is not damaged. If the tension is too weak or the chain is damaged, the chain should be replaced. The chain may break and you may fall off the bicycle if this is not done.
- Use a torque wrench to check the final tightening torque of the main crank bolt and chairing bolts. Furthermore, after riding approximately 100 km (60 miles), use a torque wrench to re-check the tightening torques. Main Crank bolt = Torque 48-52nm. Chainring Bolts = Torque 8-10nm.
- If the bottom bracket shell is not parallel, shifting performance will be affected and performance will drop.
- Check that there are no cracks in the crankarms before riding the bicycle. If there are any cracks, the crankarm may break and you may fall off the bicycle.
- Before riding the bicycle, check that there is no play or looseness in the bottom bracket connection. Also, be sure to retighten the crank, chain ring bolts, and pedals at periodic intervals
- If you feel any looseness or ‘play’ in the bearings, the bottom bracket should be inspected/replaced.
- To ensure the designed performance, only use 10 or 11 or 12sp chains.
- 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.
WARRANTY
- Praxis Works 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
M30-THRU MTB CRANK Compatibility and Spec
BOTTOM BRACKET| PRAXIS M30-THRU BSA/73mm | BB30/PF30/73mm |
BB90/92
LENGTH| 165, 170, 175
CHAINRING| 3-BOLT DM Ring
CHAIN| See your specific ring spec for chain compatibility
REQUIRED CRANK INSTALLATION TOOLS
T25 Torx wrench
8mm ALLEN wrench
Torque wrench
2.5mm Allen wrench
TORQUE SPECS
Main Crank Bolt (8mm Allen)|
48-52 Nm
T25 Torx Bolts| 9 Nm
CRANK INSTALLATION
BEFORE YOU START, READ THIS:
- Your Praxis M30-THRU bottom bracket (sold separately) must be installed in frame
- Use BB Dust Covers that came with M30-THRU bottom bracket
- For bottom bracket instructions and chainline specs : www.praxiscycles.com/manuals
- Install DM chainring. Before putting ring on crankarm, lightly grease the ring/arm interface. Using the 3 T25 Torx bolts that are in the RIGHT/DRIVE crankarm, install the ring. Bolts must be torqued to 9 Nm
- Refer to Dust Cover page (page 3) to find the correct Dust Cover for your specific crank. Sometimes Dust Covers are already on BB cups. If so the Praxis logos will show and you want to make sure that Dust Cover is the correct one for your frame
- First ensure the preload ring is tightened against the crankarm and the spindle is greased. Then, insert the LEFT/NON-DRIVE arm with spindle through the M30 THRU BB
- Install RIGHT/DRIVE arm. Grease spindle splines and main crank bolt. Using an 8mm Allen torque wrench, attach and torque the RIGHT/DRIVE crankarm to 48-52Nm
- Adjust preload. With the main crank bolt torqued, hand tighten the preload ring to tune the bearing play/preload.
Once the preload is set, snug the pinch bolt with a 2.5mm hex wrench to secure the preload.
DUST COVER GUIDE REFERENCE
Praxis M30-THRU cranks have a preload ring on the LEFT/NON-DRIVE arm that acts as the Dust Cover. For the RIGHT/DRIVE arm, be sure to use the correct Dust Cover required for your specific LYFT and bottom bracket (see guide here).
