Specifications| Weight, Shimano | 214 grams |
| Weight, Campagnolo | 194 grams |
| Bearing Size, Shimano | 6903 (4) |
| Bearing Size, Campagnolo | 6903 (2), 6803 (2) |
| Axle Diameter | 17 mm |
| Available Drillings | 24, 28 hole |
| Hub Shell Material | aluminum |
| Use | road, time trial, triathlon |
Wheel Building Dimensions| Left Flange Diameter | 39.3 mm |
| Right Flange Diameter | 47 mm |
| Left Center to Flange | 34.6 mm |
| Right Center to Flange | 17.6 mm |
Detail
For 2012, Soul Kozak's rear road hub sees a dramatic shift from a standard, lightweight design to one that is dramatically innovative and extremely durable. Borrowing from their rear disc hub design, Soul Kozak has introduced a magnetically sprung ratchet system that utilizes hardened steel drive rings forced together with three sets of high strength magnets. The outboard drive ring is machined directly onto the steel freehub body. While heavier than its aluminum counterparts, this steel freehub is not prone to cassette notching, which can make cog removal and installation extremely difficult. To save weight and increase hub durability, the freehub's internal bore is machined out to allow the insertion of large 6903 bearings (The Campagnolo freehub has a necessarily smaller outer diameter, so carries a more standard 6803 bearing). The Shimano freehub requires a proprietary lockring, which is supplied with the hub. The freehub is easily changed between Campagnolo and Shimano with no need for wheel redishing.
Please note that the simple and durable nature of Soul-Kozak's drive mechanism creates a very audible ratcheting sound when coasting.
Assembly
The Shimano version of Soul-Kozak's rear hub requires a proprietary lockring, which is supplied with the hub. Only cassettes with an 11 tooth small cog may be used with this lockring.
We recommend that wheels built with Soul Kozak hubs be assembled by an experienced wheelbuilder. We are happy to provide this service, and can provide helpful suggestions in rim and spoke selections. Please contact us directly or submit a form for a custom wheelbuild here.
