Topeak does a lot of things right with this holster pannier system - a permanently mounted holder with a removable pannier: A wide Velcro strap on the seat post and two lashing straps on the saddle frame secure the system firmly and wobble-free. The waterproof 15-litre pannier with roll-top closure can be assembled and disassembled in seconds...

Topeak does a lot right with this holster-pack system. The classic fastening system holds the holster securely on the saddle and can be further stabilised with the "Wishbone". The struts are attached to the side of the saddle bag. The Wishbone costs 34.95 euros. The Backloader is very robust...

Topeak does a lot right with this holster-pack system. The classic fastening system holds the holster securely on the saddle and can be further stabilised with the "Wishbone". The struts are attached to the side of the saddle bag. The Wishbone costs34.95 euros. The Backloader is very robust...

... The Backloader X is sturdily made and can be pulled firmly onto the saddle. It wobbles a little when riding uphill. Topeak offers the Wishbone as an accessory (for about 35 euros), which is supposed to prevent wobbling and can also hold two bottle cages. A bracket for a clamp rear light is available as a strap on the Backloader X.