The rack floats with the rear suspension. I had to make sure the rack was high enough over the rear tire lest it rub the rear tire when the shock was compressed. This issue requires sliding the rack about all the way forward toward the seat. Note that the two support clamps on the rack arms are so small they can contact the paint when installing and removing on the Rockstar leaving some small scratches. Also, need to make sure that the single bolt arm connections are very tight. Don't want them coming loose while riding. I rode the bike with the rack and bag with no issues.