It had been a while since we had a look at the Proper Bike Co. website, so we headed over there to take a look around. We took a look at their K7 cassette hub and noticed a pretty unique feature on it that really caught our eye; a shim system instead of bearings in the driver.
The K7 Cassette hub is a design that Proper had been working on for a few years. The shell of this hub is CNC machined from 7075 aluminum with a clean and simple look and spoke hole slots on the flanges for extra protection. Inside you can find a forged and heat-treated chromoly 14mm axle and the 9-tooth chromoly driver with Proper’s shim system instead of bearings to eliminate drivers blowing up. You can find two SKF 6902 sealed bearings to help keep the hub spinning smooth.
This hub is also available in a female version with 17mm hex bolts.
The K7 cassette hub is available in right and left side drive, 36 and 48 HOLE (rare commodity these days) spoke options, colors of black, high polish, dark blue and purple and a weight of 13.96 oz. (396 grams). This hub is available through all shops and mail-orders that carry Proper now!
You can find out more about Proper Bike Co. and their products by visiting their website — ProperBikeCo.com
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