The freewheel utilizes a sealed cartridge bearing instead of a loose ball system. The advantage of the cartridge bearing is that it is sealed from the elements such as mud, grit, and water. The other benefit is that the bearing is nicely contained in one simple unit and easily pulled and replaced when worn.
The ENO freewheel features a machined inner driver and machined outer gear case resulting in a freewheel that runs concentrically without the tight loose spots common to other freewheels. 36t engagement system and a case hardened, electroless nickel plated outer gear case make this freewheel very slick indeed.
I'll let Todd give his feedback on how it feels v's fixed. But is FW the new way forward for Polo?