Choosing the right rear shock is essential for optimizing ride quality, traction, and control on aggressive trails and technical descents. This guide highlights five 190 x 45 mm rear shocks (or closely matched sizes) to help riders compare options, features, and performance. Each product is evaluated on damping capability, air-spring feel, durability, and adjustability to suit AM, FR, and DH riding styles. Use the buying guide to weigh trade-offs between weight, stiffness, and travel compatibility before making a decision.
style=”display:none;”>Summary Table
| Product | Brand | Size (Eye To Eye) |
|---|---|---|
| FOX FLOAT Factory Rear Shock | FOX Factory | 190 x 45 mm |
| catazer RCP2S Downhill Shock | catazer | 190 mm |
| DNM AO-39RC Rear Shock | BRAKETB | 190 x 50 mm |
| DNM AO-38RC Mtb Rear Shock | MEROCA | 165 x 35 mm to 190 x 50 mm variants |
| DNM RCP2S Downhill Shock | MEROCA | 190 x 56 mm |
FOX FLOAT Factory Rear Shock — 190 x 45 mm
The FOX FLOAT Factory Rear Shock uses a large-volume EVOL LV air spring to deliver a linear ride with improved small bump sensitivity. It is optimized for aggressive trails and technical descents, helping maintain traction and control. The shock features a Kashima Coat finish for reduced friction and long-term durability, ensuring consistent performance in challenging conditions. This model is purpose-built for riders demanding high performance under demanding terrains.
catazer RCP2S Downhill Shock — 190 mm
This downhill rear shock emphasizes a more delicate damping system to handle both small and large impacts. It offers adjustments for rebound, compression, preload, and air pressure, plus a hard-chromed 12 mm shaft for rugged terrain. The dark AL-7075 body enhances durability, while the design supports AM, FR, and DH riding profiles for confident descending performance.
DNM AO-39RC Rear Shock — 190 x 50 mm
The 2025 upgrade to the AOY-36RC introduces a three-step lockout system with adjustable air pressure and rebound, offering versatile performance across paved roads to rugged trails. Available sizes include 190 x 50 mm, with dual-chamber adjustment for tailored spring feel. The shock combines a lightweight build with a robust AL-7075 damper shaft and AL-6061 body for reliable MTB or light-enduro use.
DNM AO-38RC Mtb Rear Shock — 190 x 50 mm
DNM AO-38RC combines light weight with robust performance, featuring adjustable air pressure up to 270 psi and a three-stage damping setup. It supports a range of endurance and trail riding styles, with a focus on reliable air spring response and consistent return control. The 190 x 50 mm size makes it a close fit for 190 x 45 frames when geometry allows, offering a viable upgrade path for riders seeking better mid-stroke support.
DNM RCP2S Downhill Shock — 190 x 56 mm
This downhill shock is designed for high-demand riders, with a coil/air-compatible platform to handle challenging terrain. It emphasizes correct eye-to-eye measurement and bushing compatibility, and it supports aggressive AM/DH riding with a 550 lbs spring rating option. Riders should confirm frame compatibility for the 190 x 56 mm size to ensure proper clearance and performance.
Buying Guide: Key Considerations For 190 x 45 mm Shocks
- Size compatibility: Ensure eye-to-eye length and stroke match your bike’s frame and suspension linkage. Small deviations can affect pedaling efficiency and geometry.
- Spring rate and damping: A higher spring rate suits heavier riders or aggressive riding, while a lower rate offers more wheel travel comfort. Rebound and compression adjustments tailor mid-stroke feel and control on rough terrain.
- Air vs. coil: Air shocks provide easy adjustability and lighter weight, while coil shocks typically deliver more consistent damping under big hits. Consider terrain, riding style, and maintenance expectations.
- Durability and finish: Look for corrosion-resistant bodies and smooth bushings. Finishes like Kashima reduce friction and wear, extending lifespan in harsh environments.
- Lockout and three-step systems: Some shocks offer advanced lockout or multi-position modes for varied surfaces. This feature can improve efficiency on climbs or smooth sections.
- Maintenance accessibility: Availability of service parts and local shop support matters for long-term upkeep and performance tuning.
- Weight vs. stiffness: Lighter shocks improve efficiency but may sacrifice bottom-out resistance. Consider frame stiffness, rider weight, and riding style when balancing these factors.
- Clearance and frame geometry: Verify that the shock’s length and travel won’t interfere with wheel, frame, or chainstay components, especially on full-suspension bikes with tighter clearances.
All listed models provide varying levels of adjustability, durability, and performance suited for different AM, FR, and DH applications. When selecting a 190 x 45 mm rear shock, prioritize compatibility with your bike’s geometry, desired ride feel, and the terrain you ride most often.