When upgrading a mountain bike, choosing a 165 x 38 mm rear shock ensures a balanced ride with capable travel and consistent handling. This guide highlights five top options that fit the 165 x 38 profile, detailing key features, build quality, and performance considerations. Each entry includes practical specs to help you compare damping control, air pressure adjustability, and overall durability for XC and trail riding.
| Product | Brand | Size | Type | Highlights |
|---|---|---|---|---|
| X-Fusion O2 PRO RL | ZEOSS | 165 x 38 mm | Air Rear Shock | Rebound, hydraulic speed lock, adjustable damping |
| DNM AO-39RC Upgrade | BRAKETB | 165 x 35 mm | Air-Adjustable | Three-step lock out, dual-chamber pressure |
| KIND SHOCK EXAForm 588RL | Kind Shock | 165 x 38 mm | Air Rear Shock | Lockout, CNC alloy body, 8mm eyelet |
| DNM AO-6 | MEROCA | 165 x 41 mm | Air Rear Shock | Adjustable air pressure up to 250 psi |
| AOY-36RC (165/190/200) | catazer | 165 x 35 mm | Air Rear Shock | Rebound, lockout, high strength aluminum |
X-Fusion O2 PRO RL 165x38mm Rear Shock
The X-Fusion O2 PRO RL rear shock for 165 x 38 mm frames features an air spring design with hydraulic damping and a lockout option. The unit emphasizes easy setup with straightforward rebound and damping controls, allowing riders to tailor the ride for XC and trail conditions. Its aluminum construction provides a robust, lightweight solution that resists deformation under heavy use. The shock is designed for riders seeking consistent small-bump response and reliable lockout performance on varied terrain. The primary advantages include adjustable damping and a lockable mode for climbing efficiency, along with a compact form factor suited to modern 165 x 38 setups.
DNM AO-39RC Upgrade 165×35
The DNM AO-39RC provides an upgraded air rear shock experience with a three-step Lock Out system and dual-chamber air pressure control. It supports 165 x 35 mm, 190 x 50 mm, and 200 x 55 mm configurations, making it suitable for a range of XC to trail setups. The three-step lockout includes Lock, Middle, and Open positions for varying terrain, while rebound and air pressure adjustments offer refined control over both ascending climbs and descending stability. The build emphasizes a durable aluminum body and a focus on consistent performance across pressure ranges.
KIND SHOCK EXAForm 588RL Dual Air 165×38
The KIND SHOCK EXAForm 588RL is built for riders who want dual-air adjustment with a 165 x 38 mm footprint. The shock features a CNC aluminum body, contributing to light weight and strength, and offers standard adjustments like rebound and compression along with high-pressure tuning. It is designed to suit XC and trail frames where precise damping control and reliability during long rides are essential. The eyelet diameter and Taiwan-made build underline a focus on dependable performance for riders who demand consistent ride quality across various trails.
DNM AO-6 165×41 Rear Shock
The DNM AO-6 is a compact, light-weight air rear shock with a 165 x 41 mm size, offering adjustable air pressure up to 250 psi. Its aluminum body provides corrosion resistance and durability, making it suitable for a wide range of mountain bikes and rider weights. The AO-6 emphasizes practical adjustability for riders who want a straightforward setup, emphasizing reliable air-spring performance and a compact silhouette that fits smaller frames or bikes with tighter clearance. It supports a variety of mounting configurations and travel preferences, enhancing overall ride quality on rugged terrain.
AOY-36RC 165/190/200mm Series
The AOY-36RC family offers a versatile 165 x 35 mm option with 165/190/200 mm length variants, featuring adjustable rebound and a resilient high-strength aluminum body. It provides reliable lockout functionality for climbs and control over high-speed descents, which is beneficial for riders who encounter varied trail conditions. The design emphasizes light weight and corrosion resistance, aiming to deliver consistent performance and long-term durability across multiple frame types in the 165 mm class.
Buying Guide: Key Purchase Considerations
- Size and compatibility: Confirm the eye-to-eye length and travel (for example, 165 x 38) to match your frame’s geometry and mounting hardware.
- Air spring versus coil: Most 165 x 38 shocks are air-sprung, offering tunable pressure for rider weight and terrain. Coils are less common in this size but may appear in certain models.
- Damping and adjustability: Look for rebound control, compression or lockout options, and whether the damper offers independent lockout modes or three-step systems for varied terrain.
- Weight and materials: Aluminum bodies balance strength and weight; CNC machining generally indicates durable construction and reliable performance under fatigue.
- Durability and warranty: Check manufacturer warranties and serviceability, including ease of air-chamber maintenance and service intervals.
- Installation and compatibility: Verify mounting hardware, axle standards, and whether the shock will fit frames with internal routing or external routing constraints.
- Riding style alignment: For XC, prioritize quick response and climb efficiency; for trail, seek balanced mid-stroke support and progressive damping for rough descents.
The selection above emphasizes options that fit the 165 x 38 mm profile while offering reliable damping controls and robust construction. When choosing, consider your typical terrain, weight, and preferred riding tempo. For riders upgrading from stock shocks, matching a model with adjustable air pressure and a user-friendly damping system can yield meaningful improvements in traction, pedal efficiency, and overall ride confidence across a mix of trails.