SEATPOST FSA SLK CARBON 31.6 350mm SB-20 SBS HEAD f/Di2SLK Carbon seat posts with removable plastic Di2 battery adapter. Carbon fiber shaft bonded to a 6061 alloy top clamp. 2 bolt SBS head keep the weight and mass to a minimum. Item Specifications: Material, Carbon, Color, Blk/Crbn, Length, 350mm,

Full Speed Ahead SL-K SB20 Seatpost 31.6mm 350mm 20mm Offset Carbon

Reference Number: 3DD9EA

Experience Precision and Performance with the Full Speed Ahead SLK Carbon Di2 Bicycle Seat Post

Elevate your cycling performance with the Full Speed Ahead SLK Carbon Di2 Seat Post, engineered for serious road and mountain bikers seeking lightweight durability and optimal compatibility. Crafted from premium UD carbon fiber, this seat post delivers superior strength-to-weight ratio, reducing bike weight while enhancing ride quality.

Materials & Engineering Excellence:

Constructed from high-grade UD carbon fiber, the SLK Carbon Di2 seat post offers exceptional stiffness, vibration dampening, and corrosion resistance. Its tubular 3K weave design is reinforced with bonded alloy SBS 2-bolt head technology, ensuring secure saddle clamping and easy adjustability. The 6061-T6 forged alloy hardware adds durability and reliability under demanding cycling conditions.

Performance & Components:

Designed for precise fitment, this seat post features a 31.6mm diameter and 350mm length, making it compatible with most modern road and gravel bikes. Its 20mm setback combined with SBS clamp allows for optimal saddle positioning, improving rider comfort and power transfer. Notably, this model is Di2 compatible, seamlessly integrating with electronic shifting systems for a sleek, cable-free cockpit.

Innovative Features:

- UD Carbon Fiber Shaft: Lightweight, stiff, and responsive for aggressive riding.

- Bonded Alloy SBS 2-Bolt Head: Secure saddle attachment with quick adjustments.

- Di2 Compatibility: Ensures flawless integration with Shimano Di2 electronic shifting systems.

- Versatile Size Options: Available in 27.2mm and 31.6mm diameters, with multiple length options to suit varied rider preferences.

- Stylish Finish & Graphics: Features a sleek UD carbon finish with black accents, enhancing your bike's aesthetic.

Style & Use Case:

Perfect for professional racers, gravel riders, and endurance cyclists, the Full Speed Ahead SLK Carbon Di2 Seat Post combines sleek style with high-performance engineering. Its lightweight design and advanced materials make it ideal for competitive racing, long-distance riding, and challenging off-road adventures.

Upgrade your bike with the Full Speed Ahead SLK Carbon Di2 Seat Post for unmatched durability, seamless Di2 integration, and a performance-driven ride. Whether you're tackling steep climbs or sprinting on the velodrome, this seat post delivers the reliability and style you demand.

  • Premium UD Carbon Fiber Shaft for Lightweight Performance and Vibration Damping, engineered with high modulus carbon for exceptional strength-to-weight ratio and enhanced ride comfort.
  • Designed specifically for Di2 electronic shifting systems, this 31.6mm diameter dropper seatpost ensures seamless compatibility and reliable electronic integration for modern road and gravel bikes.
  • Innovative 20mm setback with SBS clamp offers customizable saddle positioning, optimizing rider ergonomics and power transfer while maintaining a sleek, aerodynamic profile.
  • Constructed with forged alloy SBS 2-bolt head and chromoly steel hardware, this seatpost provides durable, secure clamp integrity and precise saddle adjustments for any cycling discipline.
  • Sleek UD carbon finish with stylish black graphics complements a variety of bike aesthetics, making it an ideal upgrade for performance-conscious riders seeking lightweight, technologically advanced components.
Item Specifications
DescriptionDi2 Compatible
MaterialCarbon
Length350mm
Setback20mm
ColorCarbon
Model NameSL-K SB20
MaterialCarbon
Diameter31.6mm

Why 365 Cycles?

365 Cycles is an Authorized Full Speed Ahead Dealer, and we offer the Full Full Speed Ahead Warranty!

Fast Shipping!

Professional Customer Service- available 7 days a week
Check out our 200,000+ amazing reviews!

365 Cycles delivers all your cycling needs fast! We don't waste time preparing your order. Our priority is to serve our customers first and foremost. If you need help picking the right product, have questions about bike component compatibility, or just want to geek out about bikes we are here 7 days a week! Simply put, we are bike experts from dirt to tarmac and want to make sure you get the full 365 Cycles experience when you shop with us.

At 365 Cycles our mission is to simplify the shopping experience. We want to get you the right product in a quick time frame and be here if you need help with questions, warranty, friend to talk to, etc.

We’re dedicated to building lasting relationships with our customers, communities, and team members. We combine the knowledge and service of a traditional bicycle shop with the convenience of shopping in your own home.





Shipping & Handling

Most orders placed during the workweek before 1:30 pm EST ship the same day, but in rare cases (peak season/holiday periods) handling time can take up to 48 hours. If you have questions regarding shipping estimates, please let us know prior to placing your order. There is a direct signature requirement for all orders over $500.

Please allow 1-2 business days for your order tracking to update.

  • Cut off for SAME DAY SHIPPING- 1:30 pm EST Monday - Friday
  • Friday afternoon -Sunday orders ship the following Monday
  • Due to carrier restrictions orders shipped to: PO Box, HI, AK, & PR 365 Cycles may use a comparable service to what was selected.

Combined Shipping Discounts

To offer customers savings on shipping, we offer discounts when shipping multiple items from our store. We cannot issue refunds on shipping once an order is finalized so please follow the 5 steps below and ask if you are having trouble with the discount before you make a purchase.

  1. Be sure you are using the US site: https://www.ebay.com
  2. Select Add to Cart (instead of Buy It Now) with items from our store 365Cycles
  3. Click on Proceed to Checkout. On the checkout page, the shipping service on each line item needs to match
  4. Compare First Class vs Priority as sometimes Priority can be cheaper and it gets to you faster!
  5. You’ll need to change the shipping method to Priority on every item in your cart before the rate can be calculated.

Returns

365 Cycles offers returns for 30 days on new items in their original, intact packaging. Return shipping for ALL orders are to be paid by the buyer. Please be sure to read our return policy entirely and if you have any questions, please contact Customer Service.

Full refunds are issued on items that are brand new and we are able to resell as new. 365 Cycles reserves the right to deny returns that are outside of policy including, but not limited to, used items, items missing original packaging, items with damaged manufacturer packaging, or international orders. Return orders must be shipped in a box or bubble mailer. Items shipped without an outer box will incur a restocking fee. You will be contacted through eBay if your return is ineligible for a full refund.

Returns must be initiated within 30 days from purchase date through your Purchase History under My eBay.

If we make an error in shipping, please contact us -- we will ship out the correct item and provide a free prepaid return label as quickly as possible!

Exchanges

If you need to exchange your order, the fastest and easiest way to do this is to reorder. We will ship your new order immediately and, in the meantime, please initiate a return through eBay on the original item and return it. We will refund for the returned item once it is received back.



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Company Details

365 Cycles
1180 Enterprise Rd
East Petersburg, PA 17520
United States

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