RedCap 16 Inch Rear Wheel Tire Assembly Instruction Manual

Product Overview

This manual provides essential information for the RedCap 16 inch Rear Wheel Tire Assembly, designed for various dirt pit bikes. The assembly includes the wheel, tire, brake rotor, and a 428 sprocket, making it a comprehensive replacement or upgrade for your dirt bike's rear wheel system. It is specifically engineered for 110cc, 125cc, 140cc, and 150cc dirt bikes, including popular models like Apollo, SSR, XR, CRF, and TaoTao. Please ensure compatibility with your bike's axle size, as this assembly requires a 15mm bearing size and will not work with 12mm axles.

Image: Complete 16 inch rear wheel tire assembly with brake rotor and sprocket.

Specifications

What's in the Box

Your RedCap 16 inch Rear Wheel Tire Assembly package includes the following components:

• Complete Rear Wheel Kit (Pre-assembled tire on rim)
• Brake Rotor
• 428 Sprocket
• Mounting Hardware (bolts for rotor and sprocket)

Image: Overview of the rear wheel assembly and included components: wheel, tire, brake rotor, 428 sprocket, and mounting bolts.

Compatibility

This rear wheel assembly is designed for a wide range of dirt pit bikes. To ensure proper fitment, please verify the following:

• Engine Size: Compatible with 110cc, 125cc, 140cc, and 150cc dirt bikes.
• Axle Hole Size: Crucially, this wheel requires a 15mm bearing size. It is not compatible with 12mm axles. Please measure your existing axle or hub bearing to confirm.
• Known Compatible Models: This assembly is commonly used on newer Apollo dirt bikes, as well as models from SSR, XR, CRF, and TaoTao. It may also fit other brands such as Thumpstar, Atomik, Pitpro, and DHZ, provided the specifications match.
• Hub Width: The hub width is 137mm (5.39 inches).

Image: Rear wheel showing the hub width measurement of 137mm (5.39 inches).

Installation & Setup

Follow these steps for proper installation of your new rear wheel assembly. If you are unsure about any step, it is recommended to seek professional assistance.

Step 1: Prepare the Bike

• Ensure your dirt bike is securely placed on a stable stand, lifting the rear wheel off the ground.
• If replacing an old wheel, carefully remove the existing rear wheel, brake caliper, and chain.

Step 2: Verify Components

• Unpack the new wheel assembly and inspect all components (wheel, tire, brake rotor, sprocket, bolts) for any shipping damage or manufacturing defects.
• Double-check that the wheel's bearing size is 15mm, as this is crucial for compatibility.

Step 3: Install Brake Rotor and Sprocket

• If the brake rotor and sprocket are not pre-installed, attach them to the designated mounting points on the wheel hub using the provided bolts.
• Ensure all bolts are tightened securely to the manufacturer's recommended torque specifications. Applying a thread-locking compound (e.g., Loctite blue) is highly recommended for these critical fasteners.

Step 4: Mount the Wheel

• Carefully position the wheel assembly within the swingarm.
• Align the brake rotor with the brake caliper and the sprocket with the chain.
• Insert the axle through the swingarm, wheel hub, and brake caliper bracket.
• Install the axle nut and tighten it to the bike manufacturer's specifications.

Step 5: Final Checks

• Spin the wheel by hand to ensure it rotates freely without any binding or rubbing.
• Check the chain tension and adjust as necessary to the bike manufacturer's recommendations.
• Verify the brake function by applying the rear brake lever/pedal. Ensure proper engagement and release.
• Before riding, perform a thorough visual inspection of all installed components and fasteners to confirm they are secure.

Image: Rear wheel assembly with both the brake rotor and sprocket securely installed.

Maintenance

Regular maintenance is crucial for the longevity and safe operation of your rear wheel assembly. Perform these checks periodically:

• Tire Pressure: Check tire pressure before each ride and maintain it according to the tire's sidewall recommendations or your bike's manual.
• Spoke Tension: Periodically check the tension of all spokes. Loose spokes can lead to wheel wobble and damage. Tighten as needed using a spoke wrench.
• Brake System: Inspect the brake rotor for wear, warping, or damage. Check brake pads for wear and replace if they are below the minimum thickness. Ensure the brake caliper is clean and functioning correctly.
• Sprocket and Chain: Inspect the sprocket teeth for wear (hooking or thinning). Clean and lubricate the chain regularly to prevent premature wear on both the chain and sprocket.
• Bearing Inspection: Check the wheel bearings for any play or roughness. Worn bearings should be replaced immediately to prevent further damage and ensure safe operation.
• Fastener Security: Regularly check all bolts and nuts, especially those securing the brake rotor and sprocket, for tightness. Re-torque to specifications if necessary.

Image: Top-down view of the tire tread, useful for inspecting wear and condition.

Troubleshooting

This section addresses common issues you might encounter with your rear wheel assembly.

Issue: Wheel Wobble or Instability

• Possible Cause: Loose spokes. Solution: Inspect and tighten all spokes evenly using a spoke wrench.
• Possible Cause: Bent rim. Solution: Visually inspect the rim for any bends or deformities. A severely bent rim may require replacement.
• Possible Cause: Worn or damaged wheel bearings. Solution: Check for play in the wheel bearings. Replace if loose or rough.
• Possible Cause: Improperly seated tire bead. Solution: Deflate the tire, apply tire lubricant to the bead, and reinflate to ensure the bead seats correctly on the rim.

Issue: Brake Noise or Reduced Braking Performance

• Possible Cause: Worn brake pads. Solution: Inspect brake pads and replace if worn beyond their service limit.
• Possible Cause: Contaminated brake rotor. Solution: Clean the brake rotor with a dedicated brake cleaner to remove oil, grease, or dirt.
• Possible Cause: Air in the brake line (if hydraulic). Solution: Bleed the brake system according to your bike's service manual.
• Possible Cause: Warped brake rotor. Solution: Inspect the rotor for signs of warping. A warped rotor will cause pulsing at the brake lever and may need replacement.

Issue: Sprocket Bolts Loosening

• Possible Cause: Insufficient torque during installation or lack of thread-locking compound. Solution: Remove bolts, clean threads, apply a medium-strength thread-locking compound (e.g., Loctite blue), and re-torque to the specified value.

Image: Front view of the rear wheel, highlighting the brake rotor, useful for brake system inspection.

Warranty & Support

RedCap stands behind the quality of its products. For any questions, technical assistance, or warranty inquiries regarding your 16 inch Rear Wheel Tire Assembly, please contact RedCap customer support through the retailer where the product was purchased. Please have your purchase details and product model number (WHL-RR) ready when contacting support.