Upgrade your bicycle's performance with the FSA (Full Speed Ahead) ACB Bearing Micro 36 x 45 - a durable, precision-engineered component designed for reliable cycling excellence. Developed with advanced materials and engineered for optimized performance, this cartridge bearing is ideal for road, mountain, and gravel bike applications. Materials & Construction: Crafted with -quality steel balls and a sealed blue rubber seal, the FSA ACB Bearing Micro ensures maximum durability and resistance against dirt, water, and contaminants. The sealed cartridge design provides enhanced protection, reducing maintenance needs and extending bearing lifespan, making it perfect for demanding riding conditions. Performance & Engineering: With precision 36x45-degree angled ball bearings, this model offers smooth rotation, reduced friction, and superior load distribution. The 51.9mm outer diameter, combined with an 40mm inner diameter bore, guarantees a secure fit and optimal performance in 1.5" headsets or bottom brackets. Its engineered design ensures consistent performance, even under high stress, making it a trusted choice for professional cyclists and enthusiasts alike. Components & Technology: Featuring a sealed cartridge bearing system, the ACB MR127 combines robust engineering with ease of installation. The sealed design maintains lubrication and keeps contaminants out, leading to longer service intervals and reliable operation in diverse cycling environments. Built to meet the demanding standards of modern bicycle components, it offers both dependability and efficiency. Style & Use Case: Designed to blend seamlessly with high-performance cycling setups, this bearing is ideal for upgrading or maintaining headsets, bottom brackets, or other critical bike components. Its compact size and durable construction make it suitable for various bike types, whether you're tackling rugged trails, fast-paced road rides, or challenging gravel adventures. Innovative Featu

CJ (comprador verificado) –
Nece replacement FSA headset bearing.
This fit my motobecane night train Ti perfectly.
stickboybike (comprador verificado) –
Always worth having an extra one in the tool box!
After thousands of miles of cycling road, mtb, gravel, rando-whatever, there’s a good chance that the bottom bearing in your headtube is pretty knackered from neglect.The bottom bearing is more exposed to debris and mud/water that’s thrown into the area, from the front tire. The top bearing is more isolated and doesn’t receive the brunt of impacts from the fork or dirt exposure. If your bike frame has a straight 1 1/8″ internal bearing system in the headtube, a simple disassembly of the front end and a wipe down of the inside of the head tube bearing-mating surfaces, along with re-installing the bottom bearing up top in the headtube and the top bearing on the fork crown race is sometimes all you need 2x a year to extend the life of your bottom headset bearing. New grease, rotate top to bottom, and bottom to top.If you have a tapered headtube frame the top bearing is a different size than the bearing that’s located at the bottom of the headset. No rotation of bearing locations is going on here. Your bottom bearing will eventually give up the ghost and need replacement.This 1.5″ bearing is an exact replacement for my GFs gravel bike. I removed the old bearing, cleaned out the old grease, applied new grease in the headset cup and around the fork crown race. Reassembled, done!Simple as that.
Jups (comprador verificado) –
Full Speed Ahead Bearing Head Fsa 1.5 36/45 ACB Mr127 Ea.
The product arrived in good condition. I had to return this because it did not fit the headset of our bike by a millimeter. Great product with good quality though.
Anonymous (comprador verificado) –
Exact OEM replacement part
This is a direct replacement for the lower bearing in an FSA tapered headset.
Darwindan (comprador verificado) –
Perfect replacement bearing
Good quality FSA replacement bearing. I have used their bearings before and they are good quality. Last a long time and will not rust as some cheap bearings do.
Keithan Truong (comprador verificado) –
Genuine FSA bearing
Genuine FSA bearing that I used to replace my lower bearing that had gone sandy and rough. If you have a tapered headtube/fork steerer tube, it should fit. The quality of the bearing is good, it has been greased from factory and spins smooth.
carla (comprador verificado) –
Good replacement
Had to replace it. Found it. Bought it.