Topeak creates an entire line of bicycle storage solutions to help cyclists carry more stuff on their rides. One of their most popular products is the Topeak Explorer rack with a quick track system that allows a variety of containers to attach to it with ease. The Explorer rack has been around for years and has many great reviews from cyclists who use it. If you decide to get the Topeak Explorer rack you will have a solid variety of options and bags in which you can mount to the rack.
The Topeak DTX trunk bag is the most popular option for cyclists to pair with the Explorer rack, but there are a lot of other good choices too. Matt from TailHappyTV recommends the EX version of the Topeak trunk bag to slide into the quick track system on the Topeak rack. The EX model is a lot less expensive since it is cheaper to begin with and also has a 25% discount available. Of course the EX model is smaller than the DTX trunk bag, but there are a lot of benefits to having a smaller bag. The MTX Topeak trunk bag EX weighs less and it is a lot less bulky than the more expensive DTX model. If you've been thinking about buying some sort of bicycle bag or saddle bags for your bike, you may want to check out the Topeak review Matt posted earlier this week.