About This Product
AC-2 describes the use of both angular contact bearings and angled bearing cups/hub bores used in the hub design. This hub features revolutionary bearing installation and function never seen before in a bicycle hub. It has been designed from the ground up for ease of maintenance and optimal bearing performance. The AC-2 also offers changeable pawl/spring configurations for varying points of driver engagement to suit a rider’s personal preference.
Here are a few key points of the AC-2 BMX Disc Brake Cassette Hub:
-The AC-2 hubs use 20mm Angular Contact bearings with a wave spring pre-load. Bearings are pressed into tapered cups that mate with the angled bores machined into the hub shell. This design feature allows bearing/cup to be easily installed and removed from hub shell without any special tools. No more presses or hammers needed! Another attribute of the tapered bearing cup/angled hub shell bore design is how the bearings seat in the hub. The bearings/cups on each side of the hub shell are in perfect alignment with each other! This ensures superior bearing performance and less chance of premature wear.
-Hub shell and driver literally “float” on the axle. The only force on the bearings is supplied by the wave spring(which delivers the appropriate bearing pre-load needed for angular contact bearings). Tightening of axle bolts has absolutely no affect on the bearings!
-The bearings, wave spring, and shim(s) are secured on the axle by one retaining ring. The only tool used to assemble/disassemble the AC-2 hub is a pair of snap ring pliers!
*Profile Racing does offer a simple tool to aid in retaining ring installation and bearing/cup removal, but is not necessarily needed.*
-The AC-2 hub cassette driver is also unique. It allows for changeable P.O.E.(points of engagement). The hub driver comes standard with 6 pawls and springs. This option offers 96 P.O.E. -Maximum engagement. The other choice is to use just 3 pawls and springs. P.O.E. is reduced to 48 and minimal drag is achieved. This is a rider preference choice and both have a unique sound!
-The proprietary Profile Racing 10 spline aluminum cassette body allows you to use our standard steel, Elite, or aluminum cogs ranging from 12t to 18t.
-The AC-2 BMX hub has a true 20mm bolt-on hollow aluminum axle.
-You have a choice of either 10mm socket head(steel or titanium), 10mm button head(steel or titanium), 15mm alum, or 20mm alum bolts when ordering your hub. This hub can be used with any standard chromoly, aluminum, or carbon frame.
- -The Profile Racing AC-2 hub is manufactured from a high grade, aerospace quality billet aluminum.
- Standard BMX 110mm width.
- ISO Standard 6 bolt disc brake mount.
- AC-2 disc brake adapters available and sold separately (10mm or 15mm).
- RHD only
- Made in the USA!
- Spoke Holes: 36h
- Bearings: Steel 20mm angular contact, Ceramic Hybrid 20mm angular contact
Weight: 355g/12.51 oz (weighed w/15mm bolts & no cog)
NOTE: Profile is experiencing a delay in production for certain products as a result of the Covid-19 restrictions. We love Profile and do our best to make sure we only show you things that are either in stock or readily available from Profile, but with that said, please be aware that you may experience a delay of anywhere from a few days to several weeks for certain items. We will contact you within 48 business hours if the Profile item/s you’ve ordered cannot be filled immediately. Thank you for your patience and understanding.