10 year warrenty The following fork dimensions are required for mounting a duo The DUO is made of two parts, and comes without a u-bow above the front wheel. Your front fork needs to have pass-through, mid-point braze-ons as well as drop-out eyelets. Mounting of bags, and riding performance, are similar to the TARA. The DUO is particularly suitable for tandems or touring bikes for medim loads and carries almost every type of pannier. NOTE - Ortlieb Panniers with QL1 fixings need spare part E110 to fit the 14mm rail with the hook