How to Install RST Fork Seal Kit on Kids Bikes

By Prevelo Bikes: Prevelo® | The Most Advanced Bikes for Kids | Published: 2026-10-20

Category: How-to Guides

Learn how to install the RST Fork 32mm Seal Kit on your child's Prevelo bike. Step-by-step instructions for fixing a leaky fork and restoring smooth suspension.

Quick Answer

To install the RST Fork 32mm Seal Kit on a Prevelo kids bike, you'll need to remove the front wheel and fork, disassemble the fork, replace the old seals with the new ones from the kit, and reassemble everything.

Why Replace Fork Seals on a Kids Bike

Over time, the seals inside a suspension fork can wear out, causing oil to leak and dirt to enter. This reduces the fork's ability to absorb shocks, making the ride less comfortable and potentially damaging the fork internals. Replacing the seals with an RST Fork 32mm Seal Kit restores proper function and extends the life of the fork.

Before You Start: Check Fork Compatibility

The RST Fork 32mm Seal Kit is designed for RST forks found on many Prevelo models, including the Zulu Two HEIR, Zulu Three, Zulu Four, and Zulu Five. Look for the RST logo on the fork bridge to confirm compatibility before ordering. If your fork is from another brand, this kit won't fit.

Step-by-Step Installation Guide

1. Remove the front wheel and fork: Flip the bike over or use a stand. Release the brake cable if needed, then unbolt the front wheel. Next, unscrew the fork's stem bolts and slide the fork out of the head tube. Common mistake: Forgetting to release the brake cable can damage it when removing the wheel.
2. Disassemble the fork: Place the fork on a clean work surface. Use a hex key to remove the top cap bolts. Carefully pull the inner legs out of the outer stanchions. The old seals will be visible at the bottom of the stanchions. Checkpoint: Note the order of washers and spacers; they must go back the same way.
3. Remove old seals and clean surfaces: Use a plastic pick or small flathead screwdriver to pry out the old seals. Wipe down the inner surfaces of the stanchions and the outer legs with a clean rag to remove dirt and old grease. Common mistake: Using metal tools can scratch the fork surface; always use plastic or brass picks.
4. Install new seals from the RST Fork 32mm Seal Kit: Lubricate the new seals with a thin layer of fork oil or assembly grease. Press them into the stanchions by hand, ensuring they sit evenly. Use a seal driver or a large socket to tap them fully into place. Checkpoint: The seal lip should face upward (toward the top of the fork). Installing it upside down will cause leaks.
5. Reassemble and refill oil: Slide the inner legs back into the outer stanchions. Add the recommended amount of fork oil (check your fork's manual). Replace the top cap bolts and torque them to spec. Common mistake: Overfilling with oil can cause the fork to not compress fully; underfilling leads to poor damping.
6. Reinstall the fork and wheel: Slide the fork back into the head tube, ensuring the stem is aligned correctly. Tighten the stem bolts to the manufacturer's torque setting. Reattach the front wheel and reconnect the brake cable. Spin the wheel to ensure it's centered and the brake pads don't rub. Checkpoint: After a short ride, check for any oil leaks around the new seals.

Product Facts

RST Fork 32mm Seal Kit: Service Parts for RST Forks. Compatible with Zulu Two HEIR, Zulu Three, Zulu Four, and Zulu Five models equipped with an RST fork. Check for “RST” on the fork bridge to confirm compatibility. This ensures you order the correct seal kit for your specific Prevelo model, avoiding the hassle of returning the wrong part.
RST Fork 32mm Seal Kit