Introduction
The MEROCA MT-100 Oil Spring Rear Shock Absorber is designed to enhance the riding comfort and performance of mountain bikes and scooters by effectively absorbing shocks and vibrations from uneven terrain. This manual provides essential information for the proper installation, operation, and maintenance of your MT-100 shock absorber.
Image: MEROCA MT-100 Bicycle Rear Shock Absorber, showing the main unit and included mounting bolts.
Specifications
The MEROCA MT-100 shock absorber is available in various lengths and spring rates to suit different bicycle and rider requirements. All models are constructed from durable aluminum alloy.
- Model: MT-100
- Material: Aluminum Alloy
- Color: Black
- Intended Use: Mountain Bikes, Scooters
- Installation Aperture: 8mm
- Bushing Dimensions: Outer Diameter 18mm, Inner Diameter 12mm, Length 24mm
Available Sizes and Weights:
| Length (mm) | Pounds (lbs) | Weight (g) | Stroke (mm) |
|---|---|---|---|
| 125 | 850 | ~258 | ~18 |
| 150 | 1000 | ~330 | ~29 |
| 165 | 750 | ~335 | ~42 |
| 165 | 1000 | ~343 | ~42 |
| 190 | 1000 | ~372 | ~54 |
Note: Weights are approximate. The installation aperture is 8mm for all models.
Image: Visual comparison of the 125mm, 150mm, 165mm, and 190mm MEROCA MT-100 shock absorber models.
Image: Detailed view of the bushing (18mm OD, 12mm ID, 24mm length) and bolt (33mm length) dimensions.
Setup and Installation
Proper installation is crucial for the performance and safety of your shock absorber. If you are unsure about any steps, it is recommended to seek professional assistance.
- Preparation: Ensure your bicycle frame is compatible with the selected shock absorber length and mounting type. Gather necessary tools, including wrenches and a torque wrench.
- Remove Old Shock (if applicable): Carefully remove the existing rear shock absorber, noting the orientation and any spacers or hardware.
- Install Bushings: The MT-100 shock absorber comes with bushings. Refer to the "Bushing and bolt size reference" image for dimensions. Ensure the bushings are correctly seated in the shock absorber eyelets.
- Position the Shock: Align the MEROCA MT-100 shock absorber with the mounting points on your bicycle frame.
- Insert Bolts: Insert the provided 33mm bolts through the frame's mounting points, bushings, and shock absorber eyelets.
- Tighten Bolts: Hand-tighten the bolts first, then use a torque wrench to tighten them to your bicycle manufacturer's recommended specifications. Do not overtighten.
- Check Clearance: Before riding, check for proper clearance between the shock absorber and other bicycle components throughout its full range of motion.
Note: The installation aperture for the bolts is 8mm. The shock absorber eyelets have a 12mm inner diameter, which is reduced to 8mm by the bushings.
Operation
The MEROCA MT-100 is an oil spring shock absorber designed to provide consistent damping. It features an internal spring combined with a damping system to absorb impacts.
- Function: The shock absorber works by compressing the internal spring and moving oil through a damping circuit, converting kinetic energy into heat and providing a smoother ride.
- Adjustability: The MT-100 series includes adjustable features. Some models may have a visible dial at the bottom eyelet, which typically controls rebound damping. Turning this dial allows you to adjust how quickly the shock absorber extends after compression. Experiment with settings to find what best suits your riding style and terrain.
Image: Close-up of the MEROCA MT-100 shock absorber, highlighting a potential adjustment dial at the lower eyelet.
Image: Illustrates the effectiveness of the shock absorber in reducing tire vibration amplitude on uneven surfaces, providing a milder cushioning effect.
Maintenance
Regular maintenance will prolong the life and performance of your MEROCA MT-100 shock absorber.
- Cleaning: After each ride, especially in dirty or wet conditions, clean the exterior of the shock absorber with mild soap and water. Wipe dry with a soft cloth. Avoid high-pressure washing directly on seals.
- Inspection: Periodically inspect the shock absorber for any signs of damage, leaks, or excessive wear on the bushings. Check that all mounting bolts are securely tightened.
- Lubrication: The internal components are pre-lubricated (internally combined with spring and damping fluid). External lubrication of the shaft is generally not required and can attract dirt. If you notice any squeaking or unusual friction, consult a professional bike mechanic.
- Storage: Store your bicycle in a clean, dry environment away from direct sunlight and extreme temperatures.
Note: Do not attempt to disassemble the shock absorber unless you are a qualified technician, as it contains pressurized components.
Troubleshooting
If you encounter issues with your shock absorber, refer to the following common problems and solutions:
- Excessive Sag or Bottoming Out:
- Cause: Spring rate may be too low for rider weight or riding style.
- Solution: Consider a shock absorber with a higher poundage (lbs) rating.
- Harsh Ride or Poor Small Bump Compliance:
- Cause: Spring rate may be too high, or rebound damping is too slow.
- Solution: Consider a shock absorber with a lower poundage (lbs) rating. If adjustable, try speeding up the rebound damping.
- Squeaking or Unusual Noises:
- Cause: Loose mounting bolts, worn bushings, or lack of internal lubrication.
- Solution: Check and tighten mounting bolts. Inspect bushings for wear and replace if necessary. If noises persist, professional inspection is recommended.
- Oil Leaks:
- Cause: Damaged seals.
- Solution: Stop using the shock absorber immediately and seek professional repair or replacement.
Always ensure the shock absorber is correctly installed and maintained before troubleshooting.
User Tips
- Choose the Right Size: Carefully measure the required eye-to-eye length and stroke for your bicycle frame before purchasing. Refer to your bike's manufacturer specifications.
- Select Appropriate Poundage: The "lbs" rating indicates the spring stiffness. A higher number means a stiffer spring. Match this to your weight and riding style for optimal performance. Heavier riders or those who prefer a firmer ride may need higher poundage.
- Experiment with Adjustments: If your shock absorber has an adjustment dial (e.g., for rebound), make small, incremental changes and test them on familiar terrain to understand their effect.
- Regular Checks: Before each ride, quickly check the shock absorber for any visible damage, leaks, or loose bolts.
Warranty and Support
For specific warranty information, please refer to the terms and conditions provided by your retailer or the MEROCA brand at the time of purchase. Keep your proof of purchase for any warranty claims.
For technical support or further assistance, please contact the seller or an authorized MEROCA service center.
