Alloy or Carbon performance eCranks made exclusively for the new TQ-HPR40 motor with 22/11 steel s...Alloy or Carbon performance eCranks made exclusively for the new TQ-HPR40 motor with 22/11 steel spindle. Compatible with: You have an eBIKE built with the TQ-HPR40 motor. LEFT & RIGHT SET | Alloy eCranks | Cold Forged Aluminium. Carbon Fiber or Forged Alloy. CL specific to this eCrank with their Ring/Sets : PRAXIS 2X = 46.5mm CL (Praxis LT2 X-KIT) | PRAXIS 1X = 47.5mm CL (Praxis DM1X RD Rings). RIGHT/DRIVE Arm utilises their 3-BOLT Direct Mount interface for our Praxis LT2 kits and our DM1X Road/Gravel Rings. Alloy Weight 520g+/- | Carbon Weight 460g+/-. Q-Factors: 150mm on TQ-HPR40 motor.
The Praxis eCranks - EC-5 Type 5 - Carbon in Black is designed for adult riders using e-bikes equipped with the TQ-HPR40 motor. Its key benefit is offering robust performance and durability through its carbon fiber construction, providing a lightweight yet strong upgrade. A potential consideration is its specific compatibility with TQ-HPR40 motors and certain Praxis chainring configurations.
All features
Age Group
adult
Colour
Black
Gender
Unisex
Model Part Number
850075674022
Brand
Praxis
Extended Product Information
FAQs
Are these eCranks compatible with motors other than TQ-HPR40?
No, these Praxis eCranks are specifically designed and manufactured to be compatible only with the TQ-HPR40 motor system.
What is the difference between the Alloy and Carbon versions?
The Carbon version weighs approximately 460g, while the Alloy version weighs around 520g. Both are designed for the TQ-HPR40 motor, but the carbon offers a lighter overall weight.
What chainring sizes can I use with these eCranks?
You can use Praxis LT2 X-KIT chainrings (46.5mm CL) or Praxis DM1X RD Rings (47.5mm CL) with the 3-bolt Direct Mount interface.
What does 'CL' stand for in relation to chainline?
CL stands for Chainline, which is the distance from the center of the crank's chainring to the center plane of the bicycle frame's drivetrain.
What is the Q-factor of these eCranks?
The Q-factor for these eCranks on the TQ-HPR40 motor is 150mm.
Can I use non-Praxis chainrings with the Direct Mount interface?
While the interface is Direct Mount, it is optimized for Praxis DM1X and LT2 X-KIT chainrings. Using other brands may not guarantee compatibility or optimal performance.
How do I maintain the carbon finish?
Clean the carbon eCranks with a soft, damp cloth and mild soap if necessary. Avoid harsh chemicals or abrasive materials that could damage the finish.
Troubleshooting
Crank arm creaking noise
Check the torque on the crank arm bolts and ensure they are tightened to the manufacturer's specifications. Clean the spindle interface and reapply appropriate grease.
Chainline appears incorrect
Verify that the correct Praxis chainring (LT2 X-KIT or DM1X RD) has been installed for the intended chainline (46.5mm or 47.5mm) and that it is properly seated on the direct mount interface.
Difficulty installing chainring
Ensure the chainring alignment is correct with the 3-bolt direct mount pattern and that no debris is present in the mounting holes.
Uneven power delivery felt
Confirm the eCrank arms are securely attached to the motor and that the chainring is not damaged or excessively worn. Check the integrity of the motor's internal components.
Pros and Cons
Pros
Lightweight carbon construction enhances ride performance.
Specifically designed for the TQ-HPR40 motor, ensuring optimal integration.
Durable steel spindle for reliable power transmission.
Direct mount interface offers versatile chainring options.
Optimized chainline options cater to different drivetrain setups.
Cons
Limited to TQ-HPR40 motor compatibility.
Requires specific Praxis chainrings (LT2 X-KIT or DM1X RD Rings) for optimal performance.
Carbon variant is lighter but may be less resistant to impacts than alloy.
Slightly more complex setup due to specific mounting interfaces.
Setup, Compatibility & Care
Compatibility:
Motor System: Exclusively compatible with e-bikes utilizing the TQ-HPR40 motor.
Chainrings: Designed for Praxis LT2 X-KIT (46.5mm CL) or Praxis DM1X RD Rings (47.5mm CL) via the 3-bolt Direct Mount interface.
Setup:
Ensure your e-bike has the TQ-HPR40 motor installed.
Select the appropriate Praxis chainring based on your desired chainline (46.5mm or 47.5mm).
Mount the eCrank arms onto the TQ-HPR40 motor spindle according to the motor manufacturer's and Praxis's specific torque specifications.
Install the chosen chainring onto the crank's 3-bolt direct mount interface.
Care:
Clean the eCranks regularly with a soft, damp cloth. Avoid abrasive cleaners or solvents, especially on the carbon finish.
Periodically check the torque of the crank arm bolts and the chainring mounting bolts to ensure they are secured to the manufacturer's recommended values.
Inspect for any signs of damage, particularly on the carbon fiber surfaces, after rough rides.