PRAXIS M24 Girder User manual
Praxis Works, LLC 207 MCPHERSON ST. SUITE E. SANTA CRUZ, CA 95060 www.praxis-works.com
• Praxis Works products are warranted 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 specic 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 web-
site. www.praxis-works.com
WARRANTY
Since specic tools and experience are necessary for proper installation, it is recommended that the
product be installed by a qualied 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 cor-
rectly, 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 nal 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 48-55Nm. 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 crank arms before riding the bicycle. If there are any cracks, the crank arm 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 11or 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 profes-
sional 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.
SAFETY INFORMATION - READ BEFORE RIDE
Note: specications are subject to change without notice. © August 2017 by Praxis Works, LLC Rev A
M24 MTB CRANK
STANDARD SPIDER
Models - M24 Girder and M24 Cadet
Required Installation Tools
M24 BSA BB One Shimano or Sram BB Tool and 3/8” Drive Ratchet
M24 BB90/92 BB/Headset Press Tool
M24 CONVERSION BB Two Shimano or Sram BB Tools and 3/8” Ratchet and BB/Headset Press Tool
GREASE SPINDLE
USE TORQUE
WRENCH!
INSTALLATION
Slide the Drive side 24mm ID
Wave Washer onto the spindle.
Next slide on the 30mm ID Drive Side
dust cover with the Praxis wordmark facing
out/away from the frame.
Now grease the spindle and insert the
crankset into the Drive cup and push spindle
through bottom bracket.
1
Slide the 22mm ID Non-Drive Side dust cover
onto the spindle, with the Praxis wordmark
side facing out/away from the frame.
2
Use an 8mm hex torque wrench and tighten
the Non-Drive crankarm bolt to 48-55Nm.
Spin crank to make sure it moves freely.
Your installation is now complete.
3
See BB Instructions for the proper
dust cover setup for your crank
RING MARKS MUST BOTH
FACE INWARD AND ALIGN
WITH DRIVE CRANK ARM
CROSS GEARING
DESIGN. BUILD. RIDE. REPEAT.
NDS COVER
(22mm ID) M24 BB TYPE DS COVER
(24mm ID)
1.7mm C-Clip
Dust Cover
M24 68/73mm BSA
(68-0301)
3.7mm Dust Cover
+
Wave Washer
M24 73mm PF30/BB30
(73-3201R)
M24 BB92
(86-0301)
M24 BB90
(86-0301)
6.8mm Dust Cover
+
Wave Washer
CHAINRING INSTALLATION
The Praxis Works chainrings are matched
sets and smooth shifting will not be possi-
ble if the chainrings are incorrectly installed.
Be sure to install the chainrings in the cor-
rect positions as the graphic shows.
CROSS GEARING SMALL/SMALL
When the chain is in the position shown at
the right, the chain may contact the front
chainrings or front derailleur and make
noise. If the noise is a problem, shift the
chain onto the next-larger rear sprocket or
the one after.
INSTALLATION TORQUE SPECS
Chainring Bolts 8-10 Nm
Main Crank Bolt 48-55 Nm
LH/Non-Drive Side
Crankarm
Chainring Bolts
(Qty 8)
Inner Chainring
RH/Drive Side
Crankarm
Outer Chainring
Chainring Nuts
(Qty 4)
M24 Standard MTB Compatibility and Spec
BB SHELL 68/73mm BSA 73mm BB30/PF30 BB90/92
BOTTOM BRACKET Praxis Works M24 for BSA, Conversion BB30/PF30, or BB90/92
FRONT DERAILLEUR Braze-on, ST Clamp, or E-type (for BSA only)
MATCHED GEARING 36/22, 36/26, 38/26
BCD 104/64 BCD
CRANKARM LENGTH 170, 175
CHAIN 10 or 11 or 12 speed
This manual suits for next models
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