Pannier Racks for BMW R 1200 GS / GSA LC and BMW R 1250 GS / GSA The Adventure Moto / Outback Motortek X-Frames for the BMW big bikes are the most universal and functional side pannier frames yet, allowing simple, secure mounting of Rotopax, hard panniers and soft luggage. We also offer standard pannier racks. The difference between our standard pannier racks and the X-Frames is that the standard frames don’t feature RotoPax mounts and tabs welded on all four corners.