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SKU: CKST3543

FSA Full Speed Ahead SL-K 2x Modular Carbon Crankset - Ultralight Hollow Carbon Arms, 12-Speed Compatibility, 50/40T Chainrings, DM/90 BCD, 30mm 386EVO Spindle, MEGATORQ Technology, Designed for Road & Gravel Cycling

Regular price $492.00
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Description
Specifications

Experience cutting-edge cycling performance with the Full Speed Ahead SL-K 2x Modular Carbon Crankset - the ultimate choice for serious road and gravel riders seeking lightweight durability, advanced engineering, and superior shifting. Crafted from premium materials and manufactured entirely in-house, this 12-speed compatible crankset delivers optimized power transfer, sleek aesthetics, and innovative technology for both competitive racing and passionate riding.

Materials & Construction

Built with FSA's proprietary Hollow Technology, the SL-K features ultra-light, hollow carbon crank arms designed for maximum stiffness-to-weight ratio. The crankset is finished with a stunning UD (ultra-durable) carbon surface, combining high-performance materials with a visually striking appearance that suits any modern cycling aesthetic. The CNC-machined 7075 aluminum chainrings with FSA's MEGATORQ technology ensure exceptional chain retention, smooth, precise shifting, and long-lasting durability under demanding conditions. The 30mm CNC-machined BB386EVO spindle provides robust support and seamless power transfer.

Performance & Engineering

Powered by FSA's revolutionary MEGATORQ technology, the chainrings boast an innovative tooth profile designed to minimize chain drops and enhance shift smoothness. The updated derailment angle on the non-contact side enables quicker, more accurate gear changes without sacrificing chain retention. The hollow carbon arms are engineered to provide optimal stiffness for efficient power transfer while maintaining a lightweight profile, making it ideal for climbers and speed-focused riders.

Components & Technology

Designed specifically for Shimano HG+ 12-speed drivetrain systems, the SL-K 2x crankset features direct mount outer chainrings and 90 BCD inner chainrings, compatible with a variety of hub configurations including 130mm, 135mm, 142mm road disc hubs, and chains stay less than 415mm. Spindle interface type is 386 EVO, ensuring compatibility with high-performance bottom brackets. Pedal spindle compatibility is standard 9/16", and the crankset weighs approximately 650 grams, offering an excellent balance of strength and lightweight design.

Style & Use Case

Sleek, black in color, the SL-K Crankset is designed for demanding road cyclists and gravel adventurers who prioritize both aesthetics and performance. Its modular design allows for versatile use on road bikes and gravel bikes, making it a perfect upgrade for riders seeking precision shifting, efficient power delivery, and a modern look. Whether tackling steep climbs, fast descents, or mixed terrains, this crankset provides the reliability and style needed for competitive and recreational cycling.

Innovative & Differentiating Features

- Full carbon hollow crank arms with FSA Hollow Technology for maximum weight savings and stiffness

- Premium CNC-machined 7075 aluminum chainrings with FSA's MEGATORQ technology for superior chain retention and shifting performance

- Updated derailment angle and tooth profile for enhanced shifting efficiency and chain security

- Modular 2x design compatible with Shimano HG+ 12-speed systems, offering flexibility and customization

- Sleek UD carbon finish for high-end aesthetics combined with professional-grade engineering

Upgrade your ride with the Full Speed Ahead SL-K 2x Modular Carbon Crankset - engineered for performance, built for durability, and designed for riders who demand the best.

  • Lightweight Carbon Construction with FSA's Hollow Technology provides exceptional stiffness and durability for high-performance cycling.
  • Optimized for Shimano HG+ 12-Speed systems with 50/40t chainrings, featuring direct mount outer and 90 BCD inner rings for seamless, precise gear shifting.
  • Enhanced chain retention and smooth shifting courtesy of FSA's MEGATORQ technology and innovative tooth profile design, reducing chain drops under maximum load.
  • Sleek UD carbon finish and premium CNC machined 7075 aluminum chainrings offer a stylish, professional aesthetic suitable for road and gravel cycling.
  • Includes a robust 30mm CNC machined BB386EVO spindle with a 172.5mm crank length, designed for demanding riders seeking lightweight efficiency and reliable performance.
Rings50/40
Number of ChainringsDouble
Drivetrain Speeds12
Chainring BCDDirect Mount FSA
Chainring BCD90
Chainline/Hub Compatibility130 Hubs
Chainline/Hub Compatibility135/142 Road Disc Hubs < 415 mm Chainstay
Chainline/Hub Compatibility135/142 Road Disc Hubs > 415 mm Chainstay
ColorBlack
Crank Length (mm)172.5
Crank Intended UseRoad
Crank Intended UseGravel
Weight650
BB IncludedNo
Pedal Spindle9/16"
Spindle Interface Type386 EVO
Defined ColorBlack
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We pride ourselves on our ability to ship and deliver your gear with excessive speed! We ship from 22 locations throughout the United States and most orders will arrive in 3 days or less with Free Shipping on orders over $75!

The nitty gritty, for specific delivery timelines please pay attention to the delivery timelines on the product pages and the time frame estimated in the carts. If you need a part by a specific day, please contact us by chat, phone, or

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Most orders placed during the workweek before 1:00 PM Eastern time ship the same day, but during peak/holiday season or depending on inventory location handling time can take up to 48 hours. If you have questions regarding shipping estimates, don't hesitate to get in touch with us before placing the order. There is a direct signature requirement for all orders over $500.

We provide the you the ability to utilize multiple shipping & billing addresses, based upon what fits your current needs. However you are responsible to maintain and update any new address changes, as 365 Cycles will not be held liable for orders being shipped to an incorrect address.

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If you need to return your order please email us at info@365cycles.com, call us at 603-968-5797, or use the live chat on our site.

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365 Cycles puts the customer above everything. Our number one goal is your satisfaction. When you press the shift lever you want the gears to shift, and when you buy bicycle parts, you want the bicycle parts to arrive on time in new condition. With over 60,000 products and 22 warehouse locations throughout the country, we have the parts you need and they are coming in hot!

Living an active lifestyle is just that, a lifestyle that never goes away and our goal is to always exceed your expectations so we can take this lifelong journey together. We strive to have the parts you need, at competitive prices with unmatched shipping speeds!

If there is ever an issue with an order we will work at warp speed to fix our mistake and make sure you never go a day without a bicycle! If you are not receiving the quality of service you need from one of our exceptionally qualified bicycle experts, tell them Ben Berman told you to tell them "Customer Loyalty" and then name your terms.

Our team is waiting to help you 7 days a week and they are more qualified to help than I am but if you ever feel like you're not getting the service you need I’m personally asking you to email me at ben@365cycles.com with "CUSTOMER LOYALTY" in the title and I will personally handle your order.

Over the years we have served millions of satisfied customers and continue to serve many of them today. With your feedback, we are confident we can take this lifelong journey together and build a friendship that goes beyond parts and accessories.

“If you want to go fast, go alone, if you want to go far, go together.” -Someone Smart

Ben Berman Founder & CEO of 365 Cycles


Company Core Values: 

These were established by the members of our team and we use them every week to call out team members who have shined in one of these areas. Feel free to let us know at info@365cycles.com if someone you worked with has gone above and beyond in one of these areas. 

Customer Loyalty

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You Control the Outcome

If it is to be, it’s up to me" You are personally responsible for controlling the outcome.

Seek Understanding

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Progress Not Perfection

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Customers, 365 Team, Partners, all need the will to win. Bring the Will to Win to every conversion.

Keep Moving

Move the body, move the mind, and remove any hurdles to achieving an active lifestyle.

Do the Right Thing:

Doing the right thing is more important than doing the thing right.

Stronger together:

If you want to go fast, go alone, if you want to go far, go together. Get your team involved and become stronger together.

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