Now comes with a hollow 14mm cr-mo axle as standard! Our most popular cassette hub. The mini hub features a non drive side low flange and a slimed down shell to save weight. The hub is available in 36h only in Right side drive or Left hand drive. . Made in the USA. Please note the STD option is a hollow 14mm cr-mo axle with cr-mo driver . No need for titanium axle when the cro mo axles are so hollow.