Topeak Omni QuickTrack Adapter Rack Adapter - Large Black MFPN=95942 A soft blue rubber is

A soft blue rubber is sandwiched between two sections of harder skate wheel rubber

with one igus bushing

sold separately (part #SD-250*)

built-in downtube storage

Topeak Omni QuickTrack Adapter Rack Adapter - Large Black MFPN=95942 A soft blue rubber isAdd a track to your rack The Topeak Omni QuickTrack Adapter attaches to a standard rear rack or Racktime system platform allowing the use of popular Topeak TrunkBags and rear baskets. A rack adapter that adds QuickTrack compatibility to standard and Racktime racks. Four adjustable mounting positions fit different length of rear racks Adjustable mounting brackets accommodate rear rack width Compatible with Topeak MTX RX TrunkBags and MTX rear baskets