What Makes the DH38 Race a Top Pick for Mountain Bikers

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The DH38 Race fork from Öhlins is a high-performance suspension fork designed specifically for serious mountain bikers. Its combination of precision engineering, innovative features, and rugged durability makes it a top choice for competitive riders and enthusiasts alike. This guide will explore everything you need to know about the DH38 Race, from installation to performance optimization.

Features of the DH38 Race

The DH38 Race is built with the needs of professional and hardcore amateur riders in mind. The fork offers a blend of cutting-edge technology and thoughtful design to deliver exceptional performance on even the toughest trails. Here are some of its standout features:

  • 38mm Stanchions: The wide stanchions provide increased strength and stiffness, ensuring better control and stability during aggressive riding.
  • Öhlins TTX 18 Damper: Known for its superior damping technology, the TTX 18 damper gives the rider a smoother ride with precise control over bump absorption and terrain response.
  • Adjustability: Riders can fine-tune the compression and rebound settings to suit their riding style and trail conditions, allowing for ultimate customization.
  • Air Spring System: The air spring system helps maintain a consistent ride feel, providing a responsive and plush performance.

Tools Required

To install and maintain the DH38 Race fork, you’ll need the following tools:

  • Torque Wrench [paid link]
  • 5mm Allen Wrench [paid link]
  • 6mm Allen Wrench [paid link]
  • 10mm Open-End Wrench
  • Shock Pump
  • Suspension Oil (specific to Öhlins specifications)
  • Rags and Clean Cloths
  • T25 Torx Wrench [paid link] (for some models)
  • Grease (anti-seize)

Installation of the DH38 Race Fork

Step 1: Prepare Your Bike

Before starting the installation, ensure that your bike is stable and secure. You may want to use a bike stand [paid link] to hold it upright. Additionally, double-check the compatibility of the DH38 Race fork with your bike’s head tube and frame. The DH38 is suitable for most modern mountain bikes with 1.5″ or tapered head tubes, but it’s always good to verify.

Step 2: Remove the Old Fork

If you’re replacing an old fork, first remove the front wheel and brakes. Then, loosen the stem bolts with a 5mm Allen wrench and slide the old fork out. Be sure to inspect the headset and bearings for wear and tear during this step. If necessary, replace or lubricate them.

Step 3: Install the DH38 Race Fork

  • Slide the DH38 fork into the head tube.
  • Align the fork’s steerer tube with the headset and ensure the correct fit.
  • Tighten the headset bearing preload with a 5mm Allen wrench to ensure smooth steering.
  • Attach the stem to the steerer tube and tighten the bolts to the recommended torque specifications (check the manufacturer’s guidelines for the exact torque).

Step 4: Reinstall the Front Wheel and Brakes

  • Install your front wheel back into the fork dropouts. Make sure the wheel is centered and that the quick-release or through-axle is securely tightened.
  • Reattach the brakes, ensuring proper alignment with the rotor. For disc brakes, make sure there is no rubbing and the caliper is securely fastened.

Step 5: Set the Sag and Tune the Suspension

Using a shock pump, set the correct air pressure in the DH38 fork based on your weight and riding style. The fork is highly adjustable, so fine-tune the compression and rebound settings for optimal performance. Test the fork to ensure proper sag and make adjustments as needed.

Adjusting the DH38 Race Fork

Compression and Rebound Settings

The DH38 Race comes with multiple damping adjustments that allow riders to customize the fork’s performance. The key adjustments are:

  • Compression: This controls the fork’s ability to resist compression under impacts. For aggressive downhill riding, increase compression for a firmer feel, or reduce it for a more plush ride on technical terrain.
  • Rebound: The rebound control affects how quickly the fork returns to its original position after being compressed. A slower rebound is ideal for smoother terrain, while faster rebound settings work better for more aggressive riding.

Air Spring Tuning

The DH38 Race uses an air spring that can be fine-tuned by adjusting the pressure. To get the most out of your ride, adjust the pressure to achieve the proper sag. For most riders, the ideal sag is typically around 30-35% of the fork’s total travel.

Maintenance of the DH38 Race Fork

Regular maintenance is essential to keeping your DH38 Race fork performing at its best. Öhlins recommends servicing the fork every 50 hours of riding or once per year, whichever comes first. Here’s a basic maintenance checklist:

Cleaning and Inspection

After each ride, clean the fork with a rag to remove dirt and debris. Pay special attention to the seals, ensuring they are free from contaminants. Use suspension-specific oils or lubricants to keep the stanchions running smoothly.

Servicing the Damper and Air Spring

  • Damper: After every 50 hours of use, you should perform a damper oil change. Remove the damper and replace the oil with Öhlins’ recommended suspension fluid.
  • Air Spring: The air spring should be checked periodically for leaks. If the air pressure drops significantly between rides, inspect the seals and replace them if necessary.

Troubleshooting Common Issues

Fork Not Returning Properly

If the fork is not returning to its original position quickly, it may be due to incorrect rebound settings. Try adjusting the rebound control to increase the return speed. If the issue persists, check for air spring leaks or low oil levels.

Poor Performance on Rough Trails

If the fork is not handling rough terrain effectively, the compression settings may be too soft. Increase the compression to provide a firmer ride. Additionally, ensure that the fork’s air spring pressure is appropriate for your weight and riding style.

Noise During Travel

Unusual noises such as creaks or clicks may occur due to dirt or debris getting into the seals. Clean and lubricate the fork seals regularly. Also, ensure that all bolts are properly torqued and that the headset is correctly adjusted.

Customization and Optimization for Better Performance

The DH38 Race fork can be tailored to suit different riding styles and preferences. For downhill riders, increasing the compression and using a slower rebound setting will allow for better control over high-speed descents. Cross-country or trail riders may prefer a more plush setup with a softer compression and faster rebound to improve traction and comfort on varied terrain.

Compatibility with Other Drivetrain Components

The DH38 Race is compatible with most modern mountain bike drivetrains, including both 1x and 2x setups. It’s important to ensure that your bike’s front triangle can accommodate the larger 38mm stanchions. Also, check that your bike’s frame offers enough clearance for the fork’s travel range, typically 180mm.

Conclusion

The DH38 Race from Öhlins is a top choice for riders looking for superior control, precision, and durability in a suspension fork. Its adjustable settings, robust design, and easy maintenance make it a reliable companion on challenging trails. By properly installing, adjusting, and maintaining the DH38 Race, you can optimize your performance and enjoy a smoother, more controlled ride.