ENVE Composites AG28 Foundation Rim - 650b 24H BlackENVE Composites AG28 Foundation Rim 650b 24H Black. ENVEs experiences developing and riding the flagship G Series and M Series have created a quiver a performance enhancing features that have been incorporated into the AG28 Rim. The AG28 is designed to be your uncompromising companion when you unwittingly bite off more than you can chew. Inner Rim Width of 28mm minimum recommended tire size of 45mm Shallow rim depth of 21mm allows improves vertical