The new AVID Shorty Battery Foam Set is the perfect compliment for racers running the lightweight “shorty” battery packs in their B4.2 and T4.2. The set includes 2 large, screen printed foam blocks with perforated cut lines which allow for a mid and offset battery location in either a B4.2 or T4.2.  Also fits older versions, B4, B4.1, T4, T4.1.