There are two versions of the "Topeak Explorer Tubular Frame Mounted Bicycle Rack"
'regular' (TA2026-B) and 29er (TA2042-B )
I'm not sure what would work best with my 700c hybrid bike?
The difference in dimensions(Size (L x W x H) 42 x 17 x 41.5 cm vs 34 x 14.2 x 41.5 cm) seems a little odd as they both support the MTX QuickTrack™ System. I do plan to get an MTX trunk bag for it.