MEROCA-RCT-3 Trunnion Coil Rear Shock Absorber 550LBS 185/205mm with Damping Adjustment for MTB Soft Tail Bike rear
Options: 185mm-550lbs; 205mm-550. Match the complete option combination to your setup.
The MEROCA RCT-3 Trunnion Coil Rear Shock Absorber is designed for soft-tail mountain bikes, downhill bikes, and electric full-suspension bikes. Featuring a 550LBS high-rigidity coil spring, aluminum alloy body, and multiple adjustment functions, it helps improve rear suspension response, traction, and riding stability on rough terrain.
With damping, compression, air pressure, and spring preload adjustment, this rear shock allows riders to fine-tune suspension performance for different riding styles and road conditions.
550LBS High-Rigidity Coil Spring
Provides strong support for aggressive riding, downhill use, and heavier load conditions.
Trunnion Mount Design
Suitable for frames using trunnion-style rear shock mounting.
Adjustable Damping Control
Rotate the rebound knob to adjust shock return speed and switch damping response quickly.
Air Pressure Adjustment
Supports 200–300 PSI air pressure adjustment for stronger and more linear support.
Compression & Preload Adjustment
Fine-tune spring firmness by adjusting the threaded preload collar.
Improved Shock Absorption
Helps keep the rear wheel close to the ground, improving grip, climbing efficiency, cornering control, and downhill confidence.
Aluminum Alloy Construction
Lightweight, durable, corrosion-resistant, and suitable for outdoor riding conditions.
This rear shock absorber is suitable for:
Please confirm the eye-to-eye length, mounting width, and bushing size before purchase.
| Item | Details |
|---|---|
| Brand | MEROCA |
| Product Name | Trunnion Coil Rear Shock Absorber |
| Model | RCT-3 |
| Part Number | MEROCA-RCT |
| Material | Aluminum Alloy |
| Length Options | 185mm / 205mm |
| Spring Rate | 550LBS |
| Adjustment | Damping / Compression / Air Pressure / Spring Preload |
| Air Pressure Range | 200–300 PSI |
| Upper Mount | M10×54mm |
| Lower Mount | M8×24mm |
| Bushing Size | 54×24mm |
| Mounting Hole Diameter | 8mm |
| Lower Hole Width | 12mm |
| Import Status | Not Imported |
| Export Use | Suitable for Cross-border Sales |
| SKU | Length | Spring Rate | Bushing | Weight |
|---|---|---|---|---|
| MEROCA-RCT3-185-550 | 185mm | 550LBS | 54×24mm | 979g |
| MEROCA-RCT3-205-550 | 205mm | 550LBS | 54×24mm | 1090g |
Weight does not include bushings.


















Each row below is one available option combination. Choose the complete combination that matches your setup.
| Option 1 |
|---|
| 185mm-550lbs |
| 205mm-550 |
