Mountain bike rear suspensions are essential for comfort, control, and traction on varied terrain. A quality rear shock smooths rough sections, keeps the tire planted, and preserves pedal efficiency across climbs and descents. When selecting a replacement, riders weigh travel length, eye-to-eye mounting size, spring type (coil versus air), damping range, and durability. The five shocks below cover a range of sizes and adjustments, offering coil and air designs suitable for cross‑country, trail, and all‑mountain riding. This guide highlights what each model brings, so you can match performance with your bike and riding style.
| Product | Brand | Available Sizes | Notable Features |
|---|---|---|---|
| DNM Preload 150mm Rear Shock | DNM | 150×30 mm | Preload adjustment, 10 mm shaft, coil spring 750 lbs, includes extra bushings |
| DNM Damping 2 System Rear Shock | DNM | 120×15, 125×15, 150×25, 165×40 mm | Two-system rebound/preload, 10 mm shaft, 6061 alloy body, 750 lbs |
| CNCLOL Multi-Size Rear Shock | CNC | 120×15 to 200×60 mm (various) | Hydraulic rear shock with multiple load options (550/750/1000 lbs) |
| DNM Damping 3 System Air Rear Shock | DNM | 165×35, 190×50, 200×55 mm | Rebound/Lockout/Air Pressure, ASTM aluminum bodies, 0.4 kg (165 mm) |
| Inkesky Coil Spring Rear Shock | Inkesky | 120 to 200 mm (various stroke options) | HLT100 coil design, 8×24 mounting, 0.65–0.9 lb weight |
DNM Preload 150mm Rear Shock
The DNM Preload rear shock combines a 150 mm travel with a lightweight aluminum body and a 10 mm shaft for durability. It uses a coil spring rated at 750 lbs, designed for XC to light AM riding. The model ships with extra bushings to simplify installation, including top and bottom bushings (8 mm x 24 mm) plus a longer 8 mm x 50 mm option. Preload adjustments let riders tune initial stiffness to their weight and riding style, helping maintain wheel contact on rough sections while keeping the bike balanced through climbs and descents.
Key considerations include compatibility with your frame’s eye-to-eye length (150×30 mm is the specified size) and the need for proper bottoming resistance. Its hard-chromed shaft helps resist wear, while the one-piece AL-6061 shock body emphasizes rigidity. For riders seeking a straightforward, reliable coil option with installation flexibility, this DNM model offers a solid balance of performance and value on varied terrains.
DNM Damping 2 System Rear Shock
The DNM Damping 2 System rear shock offers a two-system approach with separate rebound and preload adjustments. It uses a hard-chromed 10 mm shaft and a dark anodized AL-6061 shock body with a coil spring rated at 750 lbs. This model is designed for XC to AM riding styles, delivering smooth damping with consistent control across varied trail conditions. Available eye-to-eye lengths include 120×15, 125×15, 150×25, and 165×40 mm, providing flexibility for mid-range frames and upgrades.
Installation considerations include ensuring your frame accepts one of the listed sizes and confirming bushings are compatible. The combination of an adjustable rebound, preload, and durable construction makes this shock a versatile choice for riders who want predictable damping across a range of terrain. Regular maintenance—checking the seals and lubrication—will help sustain performance over time.
CNCLOL Multi-Size Rear Shock
The CNCLOL rear shock line offers extensive eye-to-eye length options, ranging from 120×15 mm up to 200×60 mm, with multiple stroke choices to fit many mountain bike frames. It supports load ratings of 550 lbs, 750 lbs, and 1000 lbs, and uses hydraulic damping to emulate air-like performance at a lower cost. This shock is positioned as a flexible option for riders upgrading older frames or building custom builds that require precise sizing across a broad range of travel.
Potential considerations include ensuring the chosen size matches the bike’s geometry and confirming the mounting hardware (8×24 bushings) is compatible with the frame. The hydraulic design can deliver smooth bottoming resistance and reliable damping across climbs and descents, though setup complexity may be higher for riders new to rear-shock tuning. This model is suitable for riders seeking a broad sizing library with solid performance at a competitive price.
DNM Damping 3 System Air Rear Shock
The DNM Damping 3 System Air Rear Shock emphasizes a tri‑adjustable format: rebound, lockout, and air pressure. It uses a dark hard-anodized AL‑7075 shaft and a dark AL‑6061 shock body, designed for XC and trail riding. Available eye-to-eye lengths include 165×35 mm, 190×50 mm, and 200×55 mm, accommodating a range of frame sizes. The model ships with top and bottom bushings (8×24 mm) and an additional 8×50 mm hardware set, expanding compatibility for different mounts.
Riders should consider the impact of air pressure on setup, additional maintenance for seals, and the availability of compatible service options. The lockout feature can be advantageous on climbs and smooth sections, while the rebound control helps tailor how the bike responds to rapid terrain changes. This shock is best for riders who want a versatile, adjustable air setup with multiple sizing choices for evolving trail conditions.
Inkesky Coil Spring Rear Shock 185mm
Inkesky’s rear shock uses a patented HLT100 coil design, offering a coil-spring solution that mimics air-like damping while maintaining a simple internal structure. This model emphasizes safety by preventing the spring from detaching from the body, a concern with some external coil setups. It provides multiple eye-to-eye options from 120 mm to 200 mm with varied travel options, using 8×24 mm mounting hardware. Weighing roughly 0.65 to 0.9 pounds, it’s a lighter coil option suitable for riders seeking a reliable, economical upgrade with straightforward maintenance.
The coil design tends to deliver consistent damping across temperatures and riding styles, but riders should verify compatibility with their frame’s mounting standards. The included bushings and hardware simplify installation, making this shock a practical choice for riders prioritizing reliability and a traditional coil feel in a modern package.
Chooee Rear Shock 120mm–200mm 1000lbs
The Chooee rear shock is designed for a broad range of sizes from 120 mm up to 200 mm and offers a 1000 lbs option. The aluminum alloy construction features anodized wear- and corrosion-resistant surfaces, with a one-piece coil and hydraulic control spring system that aims to improve ride comfort and durability over traditional coil designs. The model is positioned for MTB, DH, XC softtails, electric bikes, and scooters, highlighting adaptability for various platform types and rider weights.
When selecting a Chooee shock, ensure the weight range aligns with your rider profile (weight and riding style) and confirm the hardware compatibility with your frame. This option can deliver enhanced suspension performance for riders seeking a versatile, compact rear shock with robust damping characteristics across demanding terrains.
Buying Guide
Key purchase considerations
- Ride style and travel needs: Choose travel length and eye-to-eye sizes that match your bike frame and typical terrain—shorter travel for XC, longer travel for all-mountain or enduro riding.
- Spring type and rate: Coil shocks (like several DNMs and Inkesky models) offer consistent feel and usually simpler maintenance; air shocks provide easy adjustability of sag and support across weights with a broader range of options.
- Damping and adjustments: Look for rebound control, lockout (if needed for pedaling efficiency on climbs), and, in some cases, air pressure adjustments. More adjustable models can tailor performance to terrain and rider weight.
- Mounting compatibility: Check eye-to-eye and bushing sizes (commonly 8×24 mm) and ensure your frame has the corresponding mounting points. Some models include extra bushings for compatibility with a range of frames.
- Durability and serviceability: Aluminum bodies with robust shaft coatings resist wear. Consider manufacturers offering replacement parts, seals, and easy maintenance to extend the shock’s life.
- Weight and installation: Heavier shocks add small but noticeable weight. For riders building or upgrading, confirm available service support and the complexity of installation.
Performance comparisons
Across the selected models, coil designs tend to provide linear, predictable damping and can be preferred for end-user reliability and a familiar feel. Air shocks offer quick adjustability to rider weight and riding conditions, at the cost of more frequent pressure checks. All five options support a range of eye-to-eye sizes, helping them fit multiple frames—from XC race bikes to trail rigs. Damping ranges vary: some models emphasize two- or three-system controls (rebound, preload, lockout, and air), while others provide a straightforward coil setup with fewer adjustments. Durability and bushings are common threads across the lineup.
Compatibility and installation tips
- Measure your bike’s current eye-to-eye length and travel to pick a matching shock. If you’re between sizes, err on the side of slightly longer travel to preserve rear-end compliance on rugged terrain.
- Verify mounting hardware availability: many shocks use 8×24 mm bushings. Some products include extra bushings to fit different frame tolerances.
- Assess existing frame hardware for compatibility with the shock’s weight and damping system. Ensure your tool kit includes the correct wrenches for service intervals.
- When in doubt, consult the bike’s manufacturer guidance or a professional mechanic for proper torque specs and installation alignment to prevent binding or premature wear.
In sum, the right rear shock depends on your riding style, frame compatibility, and how much you value adjustability versus simplicity. The five models highlighted here offer a spectrum of travel lengths and damping strategies—coil and air alike—designed to improve traction, control, and comfort across a broad range of American trails. With careful sizing and proper setup, these shocks can enhance your bike’s performance without compromising reliability or maintenance practicality.