It’s the rim Arron Gwin famously rode tyreless at the 2014 Leogang DH World Cup. If you’ve not seen it, give it a google.
It’s essentially the skinny version of the EX511 with a 25mm inner width, providing a softer more balloon tyre shape for the average 2.4 tyre, in some ways providing more grip at the cost of sidewall support, but great for lighter riders.
The EX471 is a great all rounder and comes in 27.5 and 29in.

