Omni QuickTrack Adapter attaches to a standard rear rack or Racktime system platform allowing the use of popular Topeak TrunkBags and rear basketsAdjustable mounting brackets fit rear rack widths from 90mm to 120mm with 10mm to 12mm rack tube dimensionsCompatible with Topeak MTX / RX TrunkBags and MTX rear basketsRack AdapterBlackUPC/EAN/GTIN: 883466019867