Based on the very slight Alpha 340 road rim the Alpha 400 was developed. Your rims box was designed more stable by an additional crossmember.
In developing the Americans used their experience with their very good MTB rims and so created a very easy road rim.
Here, thanks to a generously dimensioned rim profile provides the Alpha a very good stiffness.
The rim flanges are kept short, as in the MTB wheels and provide a good grip for the tires. The dreaded coming off the tire is prevented. The benefits of NoTubes sealing milk system with this wheel are also possible with driving without a tube rolling resistance significantly reduces and prevents breakdowns.
Manufacturing process: CNC bent, rotated
External Width: 20mm
Inner Width: 17 mm
Height: 22.6 mm
Permissible spoke tension: 1250 N
Number of holes: 20, 24 or 32
Weight: about 420g