FOX 972-72-166 Float Dps Rear Shock Cruz Blur Lockout 170X35

( Brand: Fox ), ( Manufacturer Part Number: 972-72-166 ), ( Part Type: Float ), ( Shock Type: Air Shock ), ( Eye To Eye Measurement: 170 Mm ), ( Compatible Bike Type: Mountain Bike ), ( Set Includes: Rear Shock ), ( Stroke Length: 35 Mm )

Review FOX Factory Float Dps Rear Shock 170x35 Santa Cruz Blur Gen Lockout

The **Fox 972-72-166 Float DPS Rear Shock** from 2019 is a high-performance, precision-engineered suspension component designed to elevate the handling, comfort, and versatility of modern enduro and trail bikes, particularly those equipped with the **Cruz Blur** or similar high-end fork setups. This shock is part of Fox s **Float DPS (Digital Pressure System)** lineup, which combines the brand s legendary **Float** technology known for its seamless, adjustable rebound damping with **DPS**, a digital pressure system that allows riders to fine-tune sag and preload settings with unparalleled precision. The **2019 model** features a **170mm travel** stroke length, optimized for aggressive trail riding, enduro, and light cross-country disciplines where extended travel and progressive tuning are essential. The **35mm** piston diameter provides a robust balance of damping authority and responsiveness, ensuring smooth absorption of rough terrain while maintaining control under heavy loads or high-speed impacts.

At its core, the **Float DPS** shock leverages Fox s **TriLock** valve system, which integrates a **compression damping knob** for quick on-the-fly adjustments, paired with the **DPS digital pressure system** that allows riders to dial in exact sag percentages (ranging from 10% to 50%) via a dedicated controller. This system eliminates the guesswork of traditional spring preload adjustments, enabling riders to optimize suspension performance for varying rider weights, load conditions, and terrain types whether it s a solo rider tackling technical descents or a heavily loaded bike navigating rough singletrack. The **gen lockout** feature further enhances versatility, allowing riders to engage a progressive lockout at a user-defined travel point (adjustable via the DPS controller) to stiffen the rear end during high-speed sections or when descending steep, technical terrain, reducing bottoming out while maintaining a neutral ride feel.

Constructed with **high-grade materials**, the 972-72-166 incorporates a **steel tube** for durability and stiffness, paired with a **nitrogen-charged** chamber to prevent oil breakdown and maintain consistent performance across extreme temperatures. The **sealed, maintenance-free** design ensures longevity, while the **snap-in cartridge** allows for easy servicing or replacement of the damping components without disassembling the entire shock. The **aluminum top cap** and **anodized finish** not only contribute to the shock s lightweight yet robust construction but also provide a sleek, professional aesthetic that complements modern bike builds. Whether paired with a **Cruz Blur** fork or other high-end suspension components, this shock delivers a **smooth, progressive, and adaptable** ride, making it an ideal choice for riders seeking a balance of comfort, control, and performance on the most demanding trails.

### **Pros and Cons of buying a Fox 972-72-166 (2019 Float DPS Rear Shock, 170mm x 35mm, Cruz/Blur Gen Lockout)**

1. **High-Quality Construction** Fox is a well-respected brand in the cycling industry, known for durable and reliable suspension components. This shock is built to handle demanding off-road conditions.

2. **Float DPS Technology** The Float DPS (Dual Position System) allows for two distinct riding modes: a more aggressive "DPS" setting for rough terrain and a more compliant "Float" setting for smoother trails. This versatility makes it adaptable to different riding styles and conditions.

3. **Adjustable Rebound and Compression** The shock features adjustable rebound damping, which helps fine-tune the shock s response to rider input. Some models also include compression adjustments, though this specific model may vary slightly in its tuning options.

4. **Lockout Functionality** The lockout feature allows the rider to fully extend the shock, effectively converting it into a rigid link for climbing or riding on smoother terrain. This is particularly useful for riders who frequently switch between climbing and descending.

5. **Compatibility with Popular Bikes** The 170mm x 35mm axle spacing is designed to fit the **Cruz and Blur** models from **Specialized**, which are well-regarded trail bikes. This ensures a proper fit and optimized performance for these frames.

6. **Durability and Longevity** Fox shocks are known for their robustness, especially in demanding conditions. The materials and build quality suggest this shock can last for many years with proper maintenance.

7. **Performance-Oriented Tuning** The shock is tuned for aggressive trail riding, offering a balance between comfort and performance. This makes it suitable for riders who prioritize speed and control over pure comfort.

---

1. **Cost** Fox shocks are premium-priced, and this specific model may not be the most budget-friendly option. If you're on a tight budget, there may be alternatives from other brands that offer similar performance at a lower cost.

2. **Maintenance Requirements** Like all suspension components, this shock will require regular maintenance, including cleaning, lubrication, and occasional servicing. Neglecting maintenance can lead to premature wear or failure.

3. **Weight** Suspension shocks, by nature, add weight to the bike. While the Fox 972 is relatively lightweight for its class, it may still feel heavier than a fully rigid setup or a lower-end shock.

4. **Complexity** The Float DPS system and lockout function add layers of complexity. Riders who prefer simplicity or are new to suspension tuning may find the additional adjustments overwhelming.

5. **Potential for Overkill** If you primarily ride on smooth trails or prefer a more rigid setup, the extra features of this shock (like the lockout and DPS modes) may not be necessary. A simpler shock or even a rigid setup could suffice.

6. **Resale Value** While Fox shocks hold their value reasonably well, the resale market for high-end suspension components can be competitive. If you plan to upgrade your bike in the future, the shock may not retain its full value.

7. **Compatibility Limitations** While it fits the **Cruz and Blur**, it may not be compatible with other bike models without additional modifications. Always double-check compatibility before purchasing.

---

### **Conclusion**

The **Fox 972-72-166 (2019 Float DPS Rear Shock, 170mm x 35mm)** is a high-quality, performance-oriented suspension shock designed for aggressive trail riding. It offers advanced features like the Float DPS system and lockout functionality, making it ideal for riders who demand versatility and control on technical terrain. However, its premium price, maintenance needs, and added complexity may not appeal to everyone, particularly those on a budget or who prefer simpler setups.

If you ride a **Specialized Cruz or Blur**, frequently tackle rough trails, and value performance and adjustability, this shock is an excellent choice. For riders who prioritize simplicity, cost savings, or smoother trails, a lower-end shock or a rigid setup might be more appropriate.

### **Recommendation**

- You own a **Specialized Cruz or Blur** and need a reliable, high-performance rear shock.

- You frequently ride aggressive trails and want the flexibility of the Float DPS system and lockout.

- You re willing to invest in a premium component that will enhance your riding experience and last for years with proper care.

- You re on a tight budget and can find a similarly performing shock at a lower cost.

- You prefer a simpler setup or primarily ride smooth trails where advanced suspension features aren t necessary.

- You re unsure about maintaining suspension components and need something low-maintenance.

Ultimately, this shock is a strong choice for serious trail riders who want the best performance from their **Specialized bike**. Just ensure you re prepared for the associated costs and maintenance.

Details:

Part number: 972-72-166. Custom Tune ID DKTG. 2019 FACTORY SERIES FLOAT. Serial number.

For suspension travel of 100mm stock Blur. Has not been serviced in a while, but fully functions, damping good, lockout good.: 2019, FLOAT DPS, F-S, K, Remote Up, Evil LV, PTU, Santa Cruz, Blur, 170, 35, 0.9 Spacer, DCM, DRM, CMF, Neutral Logo. Fully functional, set up for remote lock out, push Fox to open.

From Fox Service Site.

part #: 97272166 prices

• $154.99-$279.99

specifications ribicycl:

• brand: Fox
• mpn: 972-72-166
• part type: Float
• shock type: Air Shock
• eye to eye measurement: 170 Mm
• compatible bike type: Mountain Bike
• set includes: Rear Shock
• stroke length: 35 Mm

returns ribicycl:

• policy: No Returns

payments ribicycl:

• wallet: Google-pay
• other
• credit card: Diners-club

seller ribicycl:

• # reviews: 27
• rating: 100.0%
• city: San Diego, California

general ribicycl:

• Cycling > Bicycle Components Parts > Rear Shocks
• condition: Used

offer ribicycl:

• options: Ship-to-home
• quantity: 1
• availability: In Stock
• started: February 7, 2026
• sold: 0
• best offers: True

shipping ribicycl:

• transit: 5-12 Days
• service: USPS Ground Advantage
• cost: $8.81
• class: Standard
• carrier: USPS
• type: Calculated

Fox 972-72-166 Is Similar To:

• 039-03-011 Fox Steel Coil Rear Shock Spring Stroke (37% similar) You can trust us. So you'll have to find our phone number with a magical search engine machine of your choice. Lancaster pa, 17603 and out west at 3481 old conj rd. Will walk you through creating a label from there...(September 6th, 2018)
• 039-09-010 Fox Steel Rear Shock Spring Fits Stroke (35.6% similar) 8-8 Mon-Fri, 12-4 sat sun est chat with us...(September 6th, 2018)
• 039-94-038 Fox Sls Coil Rear (19.5% similar) Lancaster pa, 17603 and out west at 3481 old conj rd. So you'll have to find our phone number with a magical search engine machine of your choice. You can trust us. Fox super light steel spring in orange item . Will walk you through creating a label from there worldwide cycle...(October 11th, 2017)
• 234-04-550 Fox Shox Float Air Valve For Forks (30.8% similar) Will walk you through creating a label from there. So you'll have to find our phone number with a magical search engine machine of your choice. Lancaster pa, 17603 and out west at 3481 old conj rd. You can trust us...(August 23rd, 2018)
• 234-04-953 Fox New Set Of Float Fork Air Volume Spacers Pn (28% similar) The tuning guide information can be found online at. Features: three 34MM 10CC air volume spacers pn can be used to change the ride. We encourage buyers to ask any questions they may have prior placing a bid if are unsure about anything in the offer or purchase. New Fox float 34MM fork air volume ...(January 8th, 2019)
• 3pos-adj Fox Float Dps Evol Rear Shock Off Stumpjumper (44.6% similar) Came on bike but was removed shortly after receiving to run a different shock. Comes as pictured Fox float dps evil rear shock 3POS-ADJ 210X50 off stump jumper 29 long travel...(March 22nd, 2019)
• 687928179669 Fox Float Ctd Mtb Fork Evolution Series Tapered (35.9% similar) Buyers are expected to pay all such fees...(October 22nd, 2018)
• 687928181440 Fox New Dhx Boostvalve Rear Shock Mtb Lbs (31.7% similar) A and Taiwan...(August 26th, 2018)
• 687928181457 Specialized New Fox Brain Future Rear Shock Mtb (29% similar) A and Taiwan...(August 26th, 2018)
• 803-00-951 Fox Shox Seal Rebuild Kit Float (17.3% similar) ...(March 30th, 2019)
• 803-01-139 Fox Float Volume Spacer Kit Pairs Plastic 702921467923 (26.7% similar) Fox float x2 volume spacer kit 3 pairs: clip-in plastic. Retail price is manufacturers suggested and may not reflect actual selling prices...(March 9th, 2018)