Review on 🚴 TSI-1 Tubeless Bicycle Tire Sealant Injector by Park Tool: Boost Your Tubeless Ride! by Muleme Anderson

The tool looks well made but the hose will not go through the seal on many valve stems. For example, it goes through the metal part of Stan's Presta valves, but has trouble going through the rubber seal at the bottom, which is smaller in diameter than the metal. You might be able to push it through with enough pressure, but that will eventually damage the tube. At least the tube can be swapped out, and maybe one day Park will offer a smaller tube. It seems like it can add sealant, but it can't suck the sealant out of the bottom of the tire. Works great on some stems where the metal extends to the bottom of the stem and the gasket is on the metal lip. I'll probably come up with a hack over time, but from the start I'm a bit disappointed. I am a trained bicycle mechanic/owner of a bicycle workshop.