It's great when you can transform your regular bike into a commuter mobile or a grocery getter in about 30 seconds. Topeak's MTX Beamrack EX is a one-piece rack that attaches to your seatpost via a simple quick release clamp and is compatible with Topeak's QuickTrack technology--literally slide the bag on and go. If you don't have the Topeak Bag, no worries; you can bungee your cargo on like on a regular rack.
Item No. » TO-BREX
Nashbar: $44.951 or more: $44.95