AC-2 MTB BOOST 148 DB CASSETTE HUB
BUILD YOUR OWN HUB (BYOH)
Choices for following:
-Hub Color/Spoke holes
“AC-2” = Dual Angular Contact. This describes the use of both angular contact bearings and angled bearing cups/hub bores used in the hub design.
The AC-2 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 Cassette Hub 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 MTB 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 thru axle 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!
-Cassette driver options include HG 9/10/11 spd or XD 11/12 spd. (Micro Spline available soon)
-The Profile Racing AC-2 hubs and cassette drivers are manufactured from a high grade, aerospace quality billet aluminum.
-Front and Rear hubs sold separately.
–Ceramic Hybrid bearing option available for hub shell bearings.
-Standard MTB BOOST 148mm x 12mm thru axle.
-ISO Standard 6 bolt disc brake mount.
-Made in the USA!
Spoke Holes: 28h, 32h
Anodized Colors: Black, Silver, Red, Blue, Gold, Purple, Green, Matte Black
Axle End Caps : 148mm x 12mm thru
Cassette Drivers: HG 9/10/11 SPD, XD 11/12 SPD
Bearings: Steel 20mm angular contact, Ceramic Hybrid 20mm angular contact
Weight: 326g/11.41 oz