The Hadley hubs are one of the best ever made hubs. The micro pawl system gives them the ability to engage every 6 degrees. The Hadley MTB hubs utilize one of the largest bearing on the market (giving them a superior life). All there hubs can be converted to all axle types such as front hubs going from Quick Release to 9mm thru axle, 9mm bolt on axles, 15mm thru axle or 20mm thru axle. The rears hubs can be converted from Quick Release to 10x135mm thru axle, 12x142mm thru axle, 12x135mm or 12x150mm thru axle. Another great feature to these hubs is they use Titanium for the driver body which again insures that these hubs will last forever. Hadley hubs are made in the USA making them (along with all there other features) by far one of the best hubs made. All the Hadley hubs can be hand built by us into any DT Swiss, Envy Composite, Mavic or Stans rims. Simply go to our Custom Wheel Building Program and spec the wheels just the way you want them and leave the rest to us.