The same is true for the Madera V2 Cassette hub- since it uses the same internals as the Profile BMX hubs, you can switch from the 14mm to the 3/8, or the 3/8 to the 14mm. (The original Madera Dexter rear hub is not convertible to anything other than 14mm.)
The Profile BMX Elite Rear hubs are NOT convertible to a 14mm GDH hub- the bearings are a different width from the rest of our BMX hubs.
-Profile Mini rear, Profile Totem rear, and the Madera V-2 rear are all compatible.
-The same goes for Profile Mini front, Totem front, and Madera Pilot front hubs.
-Each of these hubs can take any of our 14mm or 3/8 axle conversion kits. Make sure that you buy an axle specifically for the front or rear when converting.
So, if you are currently riding any of the above hubs in 14mm and would like to convert it to 3/8:
A 3/8 axle conversion kit is all you need.
Keep in mind that your existing hub body bearings and driver will convert over on any of the above hubs.
Here are links to detailed how-to’s for each conversion:
Profile/Madera 3/8 front hub
Profile/Madera 3/8 rear conversion
Profile/Madera rear 14mm conversion
-Matt Coplon