FSA Standard Headset BearingsItem Specifications: Cartridge Bearing Angle, 36x36,

Full Speed Ahead Micro ACB Black Seal Bicycle Bottom Bracket Bearing 36x36x6.5mm

Reference Number: 4S57O3

Upgrade Your Bicycle Performance with the Full Speed Ahead Bearing - Micro ACB Black Seal 36x36 - 1.5

Optimize Your Ride with Precision Engineering and Durability

The Full Speed Ahead (FSA) Micro ACB Black Seal Bearing is engineered for cyclists demanding high performance, reliability, and smooth operation. Designed with cutting-edge materials and advanced components, this bearing is a perfect upgrade for your bicycle's bottom bracket, hubs, or cranksets, ensuring enhanced efficiency on every ride.

Materials & Construction

Crafted from high-quality chromoly steel ball bearings, the FSA Micro ACB bearing offers superior strength, durability, and resistance to wear and corrosion. The precision-machined chrome moly balls guarantee consistent performance, while the robust black seal provides exceptional protection against dirt, dust, and moisture, extending the lifespan of your bearing.

Performance & Engineering

Featuring a 36 inner and outer angle, these cartridge bearings are optimized for smooth rotation, minimizing friction and maximizing power transfer. The dual seal design ensures optimal sealing performance, keeping contaminants out and lubrication in-ideal for aggressive riding conditions and long-distance cycling.

Components & Technology

Equipped with high-performance chrome moly ball bearings and precision engineering, the FSA Micro ACB bearing ensures reliable rotation and load distribution. Its sealed design reduces maintenance needs and prevents dirt ingress, thus maintaining peak performance over time.

Style & Use Case

With its sleek black seal finish, this bearing not only performs at the highest level but also adds a professional look to your bike components. Perfect for mountain biking, road cycling, or commuting, the FSA Micro ACB bearing is suited for riders seeking an upgrade to improve responsiveness and efficiency.

Key Features & Benefits:

- 36 inner and outer angles for optimized load support

- Dual-seal system for superior dirt and moisture resistance

- High-performance chromoly steel ball bearings for longevity

- Precision-engineered for smooth rotation and power transfer

- Compatible with various bike components, including bottom brackets and hubs

Specifications:

- Bearing ID: 40mm

- Bearing OD: 51mm

- Thickness: 6.5mm

- Manufacturer Number: MR006

Upgrade to the Full Speed Ahead Micro ACB Black Seal Bearing and experience the difference in ride quality, durability, and efficiency. Designed for the serious cyclist, this bearing ensures your bike performs at its best, mile after mile.

  • High-performance Micro ACB bearing with a 36x36 cartridge design, engineered for precise handling and durability.
  • Constructed with high-quality chromoly steel ball bearings, ensuring smooth rotation and long-lasting performance even under demanding riding conditions.
  • Dual seal design offers superior protection against dirt, moisture, and debris, extending bearing life and maintaining optimal speed and efficiency.
  • Perfect for use in critical bike components such as cranks, hubs, and bottom brackets, providing seamless integration and reliable power transfer.
  • Sleek black seal finish with a 36 inner and outer angle enhances style while maximizing load stability and rotational smoothness for competitive cycling and recreational riding.
Item Specifications
Cartridge Bearing Angle36x36
Bearing I.D. (mm)40
Manufacturer NumberMR006
Bearing O.D. (mm)51
Thickness6.5

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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