Park Tool TSI-1 - Tubeless Sealant Injector, One Size, Blue

If you have tubeless tires, then you'll know what a mess is made if you ever have to travel with them in a bike box and therefore have to deflate the tires. It's a seemingly small thing, but the ability easily to remove the sealant as well as insert it is the key to the value of this tool. You should also be replacing your sealant every couple of months, so this tool is useful for that, as opposed to the ones which fit over the valve stem. It's also the usual Park Tool quality.

The Park Tool Tubeless Sealant Injector is an absolute game-changer for anyone running tubeless tires. This tool makes the messy process of adding sealant much easier and cleaner. The large capacity lets me load up enough sealant for multiple tires, and the nozzle fits perfectly into both Presta and Schrader valves without any leaks.Ease of Use:The design is simple and effective—just fill the injector, attach it to the valve, and squeeze. I can get a precise amount of sealant into the tire without spilling everywhere, which makes tire maintenance much quicker and less frustrating.Quality and Durability:It’s built with quality materials that can withstand repeated use. The clear body also allows me to see how much sealant is left, which is a nice touch for tracking usage.Pros:Easy to use, mess-free sealant injectionLarge capacity for multiple tire applicationsDurable and well-madeWorks with both Presta and Schrader valvesCons:Might be a little overkill for single tire applications, but perfect for frequent tubeless usersIf you’re tired of using makeshift methods to add tubeless sealant, the Park Tool TSI-1 is definitely worth the investment. It’s simple, effective, and a real time-saver.

Park Tools means quality and innovation. They have the tool for every bike need. I run tubeless on all bikes and have tried so many ways to get the stans in without it going all over the place. None were great. Park has solved this issue. Easy to measure out, apply through the stem and no spills. Make sure you shake up the no tubes and get it in the tire asap so the tiny rubber pieces don’t clog the tool. Easy to clean if you do but being quick about the use avoids the issue.

Works great. Has easy to read measurements on the side. No complaints. This tool has made my life way easier when applying sealant to my bikes tires. Just rinse it out when you’re done.

Works really well with the Stans Tubless Sealant!

It's a $25 turkey baster but I still like it (mostly). Here's the deal. The plastic tube has a good chance it won't fit all the way through the valve stem. I have three different stems and the tube doesn't fit through the rubber end on any of them. You'll probably kink it trying to force it through so don't bother. The "extraction" part doesn't work so just stick with the brake-cable-as-dipstick method to check the level like you've been doing for years. The stopper seal is silicon so it will last more than a season. When you pull it to fill the syringe, it doesn't break off from the rubber part like the $4 ones do. The part you put your hand on is also held in place and centered so if you have to push a little harder get through a little clog, you can still do it with one hand. The sticker on the side for Oz. is going to come off at some point but the cc marks are part of the mould. Metric isn't that hard, you'll be fine. If you don't have problems with the $4 ones, keep buying them. If you want something that does a good job at at least filling your tires that is probably $7 over priced, this one works the best so far. Still can't stomach $25 for some plastic stuff? Put it on your birthday list.

Great tool for injecting sealant through the valve stem.

This is a vast upgrade from the first addition, which was like one of the syringes you buy at the drug store. I maintain a fleet of over twenty bikes used in my touring business and got tired of struggling with the old one. You would inevitably get sealant all over the wheel then you were trying to unscrew the fitting from the presta valve. The new one is purpose built with a large capacity barrel and a well built plunger. Best of all it uses a long, thin tube that simply slips right into the valve after you remove the core. Quick, easy, and best of all, no mess. This winter I'm going to add sealant to all of the bikes in my fleet and feel like I got the best tool for the job.