RACE FACE CK20NXSL136ARM170BLK Next Carbon Crankset Raceface Sl

( Brand: Race Face ), ( Manufacturer Part Number: CK20NXSL136ARM170BLK ), ( Compatible Brand: For Race Face ), ( Color: Black ), ( Bottom Bracket Shell Type: Bb30 ), ( Set Includes: Chainring, Crankset ), ( Material: Carbon ), ( Crankarm Length: 175 Mm ), ( Unit Type: Unit ), ( Compatible Bike Type: Mountain Bike ), ( Number Of Chainrings: Single ), ( Country Of Origin: Taiwan ), ( Part Type: Crankset With Chainring )

Review RACE FACE Raceface Next Carbon Crankset

The **Race Face Next SL Carbon Crankset (CK20NXSL136ARM170BLK)** is a high-performance, ultra-lightweight drivetrain engineered for cyclists seeking precision, efficiency, and durability across a wide range of riding disciplines. Part of Race Face s Next SL series, this crankset combines cutting-edge carbon fiber construction with meticulous aerodynamics and ergonomic design to deliver an unparalleled riding experience. The **136mm BCD (bolt circle diameter)** arm length strikes an optimal balance between power transfer and pedal efficiency, making it ideal for road racing, time trials, and endurance rides where every watt and gram matters. Crafted from **high-modulus carbon fiber**, the crankset features a **3D-printed arm design** that minimizes weight while maximizing stiffness, reducing rotational mass and enhancing pedal feel. The **ARM170** designation indicates a 170mm spindle length, which, when paired with the 136mm arms, creates a compact yet powerful pedal stroke perfect for climbers and sprinters alike. The **Next SL** platform is compatible with **Race Face s proprietary 136mm BCD arms**, ensuring a seamless fit with other components in the system, such as the **Next SL chainrings** and **Next SL bottom bracket**. The **black matte finish** not only adds a sleek, professional aesthetic but also helps dissipate heat, contributing to long-term durability. Whether tackling grueling hill repeats or chasing personal bests on flat-out sprints, this crankset s **aerodynamic profile** and **optimized weight distribution** ensure smooth, responsive power delivery with minimal vibration. Built to withstand the demands of competitive cycling, the **Next SL Carbon Crankset** is a premium choice for riders who demand nothing less than excellence in performance and craftsmanship.

The **Race CK20NX-SL136ARM170BLK (RaceFace Next SL Carbon Crankset)** is a high-end, performance-oriented crankset designed for road cycling. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

### **Pros**

1. **Ultra-Lightweight Construction**

The crankset is made from **carbon fiber**, which significantly reduces weight compared to aluminum or steel alternatives. This contributes to better pedal efficiency and reduced fatigue over long rides.

2. **High Strength-to-Weight Ratio**

Despite its lightweight nature, the **RaceFace Next SL** uses advanced carbon layup techniques to ensure durability and resistance to bending or fatigue, even under heavy loads.

3. **Smooth Power Transfer**

The carbon construction provides a more **responsive and efficient** transfer of power from the rider to the drivetrain, which is beneficial for climbers and sprinters alike.

4. **Aerodynamic Design**

The **Next SL** features a streamlined, aerodynamic shape that reduces drag, making it ideal for high-speed riding and time trials.

5. **Compatibility with High-End Components**

The crankset is designed to work seamlessly with **RaceFace s full line of components**, including wheels, bottom brackets, and pedals, allowing for a fully optimized system.

6. **Durability in Racing Conditions**

The **ARM170** (170mm arm length) is a standard length that balances power transfer and efficiency, while the **NX-SL** variant is built to withstand the stresses of competitive racing.

7. **Minimal Maintenance**

Carbon components require less maintenance compared to metal cranksets, as they are resistant to corrosion and do not need lubrication like chainrings do.

8. **Premium Build Quality**

RaceFace is known for its **high-quality manufacturing**, ensuring tight tolerances and a polished finish that enhances both performance and aesthetics.

---

### **Cons**

1. **High Cost**

As a **premium carbon crankset**, this product falls into the **high-end price range**, making it less accessible for budget-conscious cyclists. The cost may be justified for professional or elite-level riders but could be overkill for recreational riders.

2. **Limited Availability & Customization**

Unlike mass-produced aluminum cranksets, carbon options like this one may not be as widely available in retail stores. Additionally, customization options (such as color or arm length) are more restricted compared to metal alternatives.

3. **Potential for Damage from Impact**

While carbon is strong, it is **not immune to sudden impacts** (e.g., hitting a curb or pothole). Unlike aluminum, carbon can crack or delaminate without immediate visible signs, making it harder to detect damage.

4. **Less Repairability**

If the crankset sustains damage, repairs can be **costly and complex**, often requiring professional intervention. Unlike aluminum, carbon cannot be welded or easily reinforced.

5. **Not Ideal for Off-Road or Gravel Use**

While it performs exceptionally well on the road, the **Next SL** is not designed for rough terrain. The lack of protection against debris (common in gravel or mountain biking) makes it less suitable for mixed-surface riding.

6. **Learning Curve for Installation**

Carbon cranksets often require **specialized tools and expertise** for proper installation, especially when dealing with carbon bottom brackets or spindle interfaces. Improper handling can lead to damage.

7. **Environmental & Ethical Considerations**

Carbon fiber production is **energy-intensive and less sustainable** than aluminum. Some cyclists prefer metal cranksets for environmental reasons.

---

### **Conclusion**

The **Race CK20NX-SL136ARM170BLK (RaceFace Next SL Carbon Crankset)** is one of the best **high-performance, lightweight, and aerodynamic** cranksets available for road cycling. It excels in **speed, efficiency, and responsiveness**, making it an excellent choice for **competitive riders, time trialists, and those seeking a premium drivetrain**.

However, its **high cost, limited availability, and susceptibility to damage** make it less ideal for **recreational riders or those on a budget**. Additionally, its **specialized nature** means it requires careful handling and may not be the best fit for off-road or mixed-terrain cycling.

### **Recommendation**

- You are a **serious road cyclist, racer, or time trialist** looking for maximum performance.

- You already own **RaceFace components** and want a fully optimized system.

- You prioritize **weight savings and aerodynamics** over cost.

- You can **afford the premium price** and maintain it properly.

- You are a **recreational rider** who doesn t need carbon-level performance.

- You frequently ride on **rough terrain** or gravel.

- You prefer **durability and repairability** over lightweight construction.

- You are **budget-conscious** and can find a similarly performing aluminum crankset at a lower cost.

For most **elite or high-performance road cyclists**, this crankset is a **worthwhile investment**. For others, a **high-quality aluminum crankset** (such as Shimano s Dura-Ace or SRAM s Force) may offer a better **cost-to-performance ratio** without sacrificing too much weight or efficiency.

Details:

Very good condition. RaceFace Next SL Carbon Crankset, 170mm arms, with Wheels MFG threaded bottom bracket and round 30T direct mount chainring.

part #: ck20nxsl136arm170blk prices

• $449.99-$465.50

specifications ribicycl:

• brand: Race Face
• mpn: Ck20nxsl136arm170blk
• compatible brand: For Race Face
• color: Black
• bottom bracket shell type: Bb30
• set includes: Chainring, Crankset
• material: Carbon
• crankarm length: 175 Mm
• unit type: Unit
• compatible bike type: Mountain Bike
• number of chainrings: Single
• country of origin: Taiwan
• part type: Crankset With Chainring

returns ribicycl:

• policy: No Returns

shipping ribicycl:

• cost: $7.57
• transit: 5-10 Days
• carrier: USPS
• type: Calculated
• service: USPS Ground Advantage
• class: Standard

seller ribicycl:

• rating: 100.0%
• city: Hailey, Idaho
• # reviews: 19

payments ribicycl:

• other
• wallet: Google-pay
• credit card: Visa

offer ribicycl:

• best offers: True
• availability: In Stock
• started: March 25, 2026
• options: Ship-to-home
• quantity: 1
• sold: 0

general ribicycl:

• condition: Used
• Cycling > Bicycle Components Parts > Cranksets

Race Face CK20NXSL136ARM170BLK Is Similar To:

• 01965031306 Race Face Raceface Chainring Speed (40.4% similar) Raceface chainring - 8 speed, 74BCD 26T, new...(April 26th, 2018)
• 18-9231b Race Face Rf Next (38.2% similar) ...(January 10th, 2018)
• 18-9231r Race Face Rf Next (38.2% similar) ...(January 10th, 2018)
• 29-300-17-75-20 Race Face Aeffect Spindle Crank No Bottom Bracket (39.1% similar) Race Face - affect sl crank 32T 175MM no bottom bracket. 24MM spindle. BSA bottom bracket compatibility...(May 2nd, 2018)
• 450647-05 Race Face Chester Pedal 821973315287 (29.4% similar) Race Faces Chester pedals don't have the shiny aluminum construction of some their pricier counterparts, but they also won't empty your wallet, and Face carefully constructs nylon composite body to make it just as grippe responsive versions. Using eight replaceable steel hex traction pins on each ...(April 16th, 2018)
• 83166 0 0 83166 0 Race Face Cx-single (30% similar) Stiff 4MM plate thickness and i-beam construction transfer loads without flexing. Narrow wide tooth profiling ensures ultimate chain retention. Compatible for 9, 10 and 11 speed. Reversible laser etched graphics...(October 15th, 2017)
• 83246 0 0 83246 0 Race Face Mountain (26.3% similar) Rail riding can be tough on your gear. Protect your cranks from any damage with Race Face crank boots. Optional pedal end boots protect crank arms the ends of your carbon cranks can take a lot abuse as trail rushes underneath you and bike. Wrap it up and protect the tips. Made from a durable Race ...(October 17th, 2017)
• 83250 0 0 83250 0 Race Face Fat 821973213569 (24.3% similar) These cranks can be built up with various chainring bash combos and come our fully revamped bb. Rf crank model's available with 100MM option include: fully forged for maximum fatigue resistance CBC machined of ultra-high strength 7050 aluminum alloy to maximize weight ratio aggressive i-beam ...(October 17th, 2017)
• 83360 0 0 83360 0 Race Face Respond 821973181066 (27% similar) Forged blasted 6061 aluminum for high strength fatigue resistance at a reasonable weight. The respond stem is engineered to offer an optimal combination of strength, stiffness and weight. Interlocking u-shaped handlebar clamp geometry transferring more load through the stem body and not Face plate ...(October 17th, 2017)
• 85923 0 0 85923 0 Race Face Cx (25.8% similar) Stiff 4MM plate thickness and i-beam construction transfer loads without flexing. Reversible laser etched graphics. Compatible for 9, 10 and 11 speed. Compatible for 9, 10 and 11 speed...(October 17th, 2017)
• 91-4510b Race Face Atlas Stem 821973186849 (26.7% similar) MPN:91-4510B...(September 28th, 2017)