Upgrading Your Ride: Is RXF38 m.2 Worth It?

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The Öhlins RXF38 m.2 [paid link] is a high-performance suspension fork designed for serious mountain biking enthusiasts. With its advanced technology and exceptional engineering, the RXF38 m.2 [paid link] has quickly become a popular choice among riders who want the best in terms of performance, durability, and adjustability. In this guide, we will explore the installation, adjustment, maintenance, and troubleshooting of the RXF38 m.2, as well as compare it to similar models to help you decide if it’s the right upgrade for your ride.

Tools Required

  • 5mm, 6mm, and 8mm Allen wrenches [paid link]
  • Torque wrench [paid link] (up to 15Nm)
  • Suspension fork oil (specific to Öhlins specifications)
  • Cleaning cloths
  • Grease (preferably suspension grease)
  • Fox or RockShox air pump (for setting up air pressure)
  • Flat-head screwdriver
  • Soft mallet
  • Service manual (for detailed maintenance instructions)

Installation of the RXF38 m.2

Installing the Öhlins RXF38 m.2 fork involves several key steps that require careful attention to ensure a proper fit and optimal performance. Here’s a breakdown of the installation process:

1. Remove the Old Fork

Before you install the RXF38 m.2, you must first remove the existing fork from your bike. Loosen the headset stem bolts using the appropriate Allen wrenches [paid link] and remove the fork by sliding it out of the head tube.

2. Install the Fork Crown

Place the RXF38 m.2 fork into the head tube and align it with the headset. Ensure that the fork’s crown is seated properly and the steerer tube is at the correct height for your bike.

3. Secure the Stem

Once the fork is in place, reattach the stem to the steerer tube. Tighten the stem bolts to the specified torque, ensuring they are evenly tightened. This step ensures the fork is securely fixed in place.

4. Adjust the Suspension Settings

Set the sag and air pressure in the RXF38 m.2 according to your weight and riding style. Use an air pump compatible with Öhlins forks to adjust the air pressure in the positive and negative air chambers. The recommended sag is typically around 20-25% of the fork’s total travel.

5. Install Brake Calipers and Wheel

Reinstall the brake calipers onto the fork’s brake mounts. Ensure that the calipers are aligned with the rotor. After securing the brake calipers, mount the front wheel, ensuring the axle is tight and properly aligned with the fork’s dropouts.

6. Test the Setup

Once everything is installed, perform a few quick tests to ensure the fork is functioning correctly. Test the fork’s travel by compressing it manually and ensuring smooth motion. Check for any unusual sounds or resistance. Fine-tune the suspension settings for your riding preferences if needed.

Adjustment of the RXF38 m.2

The Öhlins RXF38 m.2 is highly customizable to suit various riding conditions. Adjusting its air spring, damping, and preload settings allows you to fine-tune the suspension to your specific needs.

Air Pressure Adjustment

The RXF38 m.2 features independent positive and negative air chambers, allowing for precise control over the fork’s progression. Adjust the positive chamber air pressure to fine-tune the support and response of the fork. The negative chamber adjustment impacts the fork’s sensitivity and plushness during the initial travel. Start by setting the sag to 20-25% of total travel and adjust as necessary for your weight.

Compression and Rebound Damping

The RXF38 m.2 comes with a separate low-speed compression and rebound damping system. Adjust the low-speed compression to control how the fork reacts to small bumps and trail chatter. The rebound adjustment controls the speed at which the fork returns to its extended position after compression. Fine-tune both settings to balance performance between comfort and control.

Hydraulic Preload Adjustment

To adjust the fork’s overall stiffness, the RXF38 m.2 also includes hydraulic preload. This setting affects how the fork reacts under initial load and helps improve performance on rougher terrain. Set it to the recommended level based on your riding conditions.

Maintenance of the RXF38 m.2

To maintain optimal performance, regular servicing is essential for the Öhlins RXF38 m.2. Here’s how to keep it in top condition:

Regular Cleaning and Lubrication

Clean the fork after every ride by wiping down the stanchions and seals with a damp cloth. Ensure that no dirt or debris remains on the fork, as it can damage the seals. Periodically grease the lower leg bushings to keep the fork functioning smoothly.

Changing the Oil

Öhlins recommends changing the fork oil every 50-100 hours of riding. This can be done by removing the lower legs, draining the old oil, and refilling with the recommended oil. Changing the oil ensures that the fork’s damping performance is always at its peak [paid link].

Checking and Replacing Seals

Inspect the seals regularly for any signs of wear. If the seals become damaged or worn, replace them promptly to avoid damaging the fork’s internals. Seals should also be greased to maintain their functionality and prevent dirt ingress.

Performing a Full Fork Service

A full service involves disassembling the fork, cleaning all internal components, replacing the oil, and inspecting the fork for wear or damage. A complete service is typically recommended every 150-200 hours of riding, depending on riding conditions.

Troubleshooting Common Set-Up Issues

While the RXF38 m.2 is a highly reliable fork, it may occasionally present issues during set-up. Here are some common problems and their solutions:

Fork Not Holding Air Pressure

If the fork is losing air pressure, check the Schrader valve for leaks. If the valve is fine, inspect the seals on the air chambers. Damaged seals should be replaced to prevent further air loss.

Fork Bottoming Out

If the fork is bottoming out too often, increase the air pressure in the positive air chamber or adjust the low-speed compression damping. Additionally, check the fork’s sag and make sure it is set within the recommended range.

No Rebound Control

If the rebound damping seems ineffective, ensure that the rebound knob is set correctly. If the issue persists, the damping oil may need to be changed or the internal components may require servicing.

Comparison with Similar Models

The Öhlins RXF38 m.2 is often compared to similar high-end forks from brands like Fox and RockShox. Here’s how it stacks up:

  • Fox 38 Factory: Both forks feature 38mm stanchions, offering a similar level of stiffness and performance. However, the RXF38 m.2 is known for its smoothness and superior small-bump sensitivity, thanks to Öhlins’ TTX18 damper.
  • RockShox ZEB Ultimate: The ZEB offers a more aggressive, coil-like feel with its higher damping range. However, the RXF38 m.2’s air-spring system provides better adjustability and tuning options for a wider variety of riders.

When choosing between these models, consider factors like the type of riding you do, your weight, and personal preferences for suspension feel. If you’re looking for a fork that delivers precise adjustability and exceptional small bump performance, the RXF38 m.2 stands out as one of the best options.

Compatibility with Other Drivetrain Components

The RXF38 m.2 is compatible with a wide range of drivetrain setups, thanks to its standard 15mm or 20mm through-axle options. Ensure that your bike’s frame supports these axle configurations before purchasing the fork. Additionally, check that the fork’s steerer tube is compatible with your bike’s head tube size. The RXF38 m.2 can be used with any drivetrain that supports modern suspension forks, making it an ideal upgrade for most high-performance mountain bikes.