Topeak DynaWedge

The DynaWedge is designed to accommodate seat posts ranging from 25.4 mm to 31.8 mm, which covers the vast majority of standard road and mountain bike seat posts.

Because it uses a dual-point mounting system that attaches to both the saddle rails and the seat post, the DynaWedge stays very stable and secure, even when you are riding over rougher terrain.

The DynaWedge features a weather-resistant molded construction designed to keep your tools and tubes dry during rain showers or road spray. While it is highly protective, it is not intended to be submerged in water.

It is a compact, aerodynamic bag, so it is best suited for essentials like a spare tube, a multi-tool, tire levers, and a CO2 inflator. It is not designed to carry bulky items like extra clothing or large snacks.

Yes, you can use it with a dropper post, but you should ensure there is enough clearance between your saddle and the tire when the post is fully compressed to prevent the bag from rubbing against the rear wheel.