Before starting your crankset installation, please check that you have all the necessary parts: crank arms, XL axle, spider, and chainring. Many cyclists wonder if a crankset will fit their bike - this mainly depends on your bottom bracket type. The Spirit series is designed with compatibility in mind, but if you're unsure, it's always best to consult with your local bike shop about proper crankset installation requirements.
For this installation, you'll need the following tools:
Torque wrench (very important!)
8mm hex wrench
T20 hexalobular wrench
II. Installation Steps
Step 1: Install the Chainring onto the Spider
First, place your chainring on top of the spider. Today we're using a four-arm chainring, so it needs to be installed on the four-arm spider. Align the holes and secure the chainring with the appropriate screws.
Each brand of chainring has different torque specifications for the screws. One feature worth mentioning is that most BCD 110mm chainrings on the market can be installed on the Spirit spider, giving you plenty of options for customization when planning your crankset installation.
Step 2: Attach the Chainring Assembly to the Right Crank Arm
Next, take the chainring and spider assembly we just created and attach it to the drive side (right) crank arm. You'll need to use eight screws total, secured with the T20 hexalobular wrench.
Note that the locking torque here should only be about 4-5 Newton meters - don't overtighten! This is one of the most common questions: "How tight should cranks be?" For these specific screws, 4-5Nm is sufficient.
The modular design of this crankset allows you to easily swap out different chainrings or spiders based on your riding needs - a major advantage over traditional one-piece designs when installing cranksets for different riding conditions.
Step 3: Insert the XL Axle Through the Bottom Bracket
Now we need to insert the XL axle through the bottom bracket of your bike frame. An important detail: there's a spacer designed specifically for the bottom bracket. This spacer goes on the drive side, so make sure it's positioned correctly before insertion.
The XL axle is designed for optimal stiffness - and yes, crank stiffness does matter! A stiffer crankset provides better power transfer from your legs to the drivetrain, especially noticeable during sprints or climbs.
Step 4: Install the Right Side Crank Assembly
Take the assembly we've been working on and install it onto the drive side. Start by using an 8mm hex wrench to lock it clockwise into the screw hole until it feels tight.
Then switch to your torque wrench (also with an 8mm hex bit) and set it to 50-55 Newton meters. This answers another common question: "What torque should a crankset be?" For this Spirit modular crankset, the correct torque is 50-55Nm.
Securely tighten the right side to this specification. Proper torque is critical - too loose and your crank could come off during riding; too tight and you risk damaging components. This step is crucial for a safe and reliable crankset installation.
Step 5: Install the Left Crank Arm
For the left arm installation, first turn the pre-load ring clockwise to fit the left arm. This step is crucial - skipping it may result in a loose fit.
Just like with the right side, use your 8mm hex wrench to lock it clockwise, then finish with the torque wrench set to 50-55Nm. "How much should you tighten a crank arm?" The answer is the same for both sides: 50-55Nm for optimal performance and safety.
Step 6: Final Adjustments
Now you'll notice there's a gap between the left arm and the bottom bracket of the frame. This is where we need to adjust the pre-load ring.
Turn the pre-load ring to tighten it against the bottom bracket cap. This fit needs to be very secure to avoid any gaps during your ride. You can also use a plastic mallet to tap the drive side three times, then repeat the tightening of the pre-load ring.
Once you're sure the pre-load ring is firmly attached to the bottom bracket cap, tighten the pre-load ring screws. This unique design element ensures a secure fit with no unwanted movement during riding. A proper crankset installation should always end with this verification step.
III. Post-Installation Check
Before riding, it's recommended to use your torque wrench once more to verify that all screws are properly tightened. This quick check can prevent potential issues down the road.
Regarding the question "Can you put any crankset on any bike?" - while the Spirit is designed for wide compatibility, always ensure your bottom bracket type is compatible. If you're upgrading from another system, you might need a bottom bracket adapter.
IV. Customer Pain Points
Are you tired of cranks that flex too much under power? Or perhaps you're looking for a lightweight option that doesn't sacrifice stiffness? The Spirit modular crankset addresses these common issues with its rigid yet lightweight design.
Do lighter cranks make a difference? Absolutely! The weight savings may seem small, but it's rotating weight - which means you'll feel the difference with every pedal stroke, especially during acceleration and long climbs.
With proper installation as outlined above, your new crankset will provide reliable performance for many miles to come. Happy riding!
