I was looking at the Topeak MTX TrunkBag DXP and can't seem to find how large the main, trunk compartment (the one not including the expandable panniers) is compared to the other models. Does anyone know which of the Topeak TrunkBags has the largest trunk compartment space?

Thank you! <3

Same as the non-pannier version. The panniers take up about 1/2 of the side pockets.

Thanks!

I've got one at home that I can measure after work. The main compartment is fairly large but it has no outside pockets to speak of -- unless you count the zippered flaps that hold almost nothing. I ordered one because I like the way Topeak bags hold their shape without flopping. However, the trunk bag is surprisingly wide and doesn't fit my rack very well. Make sure you have a wide enough rack before you order one.

The rack I have is the Topeak MTX rack which is made for these bags so I can't imagine there being any problem.

It slides right on and locks into place. Its as solid as anything I have seen.