VeloTubes FR 21 40Mm Black Review

Works well in non-tubeless rims I converted it to tubeless using Gorilla Tape. If needed, simply drill 1 inner layer of the rim to widen the hole so that the tapered rubber covers the hole in the *middle* of the tapered rubber section, not just the small end to create a good seal.

It worked but really needs tightening. I had to use a couple of handles to hold it and another to loosen the nut. That's really a trick given the thin aluminum. One hit and they simply snap or burst from the force of the pull. The rubber bushing inside seems too stiff to ensure a good seal. The bore of my rims is clean and smooth with no burrs, which means it's the rubber used.

So you have to buy metal SLIME valve extenders if you can't use an air pump/cartridge on them because they are too short for your rim. It's great - and you only need one - attach it somewhere on your pump or frame when you need to add air. But the length + available for Presta style valves is NOT yet available for Schrader tubeless valves. And the choice of these colored valve stems is even more limited. By the way - with deep rims you only see the valve cap anyway - so get the longest and…