Slime  Self-Sealing Smart Presta Tube - 27.5 x 2.0 - 2.4

I ride a trail that has a lot of goat head thorns. I flatted right away the first time I rode with ordinary tubes. My mountain bike friends said I should go tubeless, but using these self-sealing tubes seemed like an easier and less messy solution. So far, so good. I picked up 4 thorns on my last ride, two of which made big penetrations in the tire and tube. When I pulled out the thorns at the end of the ride, air came rushing out along with some green slime and some greasy fluid. The air came out for 20-30 seconds before it stopped up with little pressure left in the tire - but not totally flat. I didn't try, but I'm pretty sure I couldn't have ridden on it without more air. However, I waited until the next day and re-inflated the tire. The seal appears to be holding several days later. I can't say how long this will last, but I'm satisfied so far.

My Son rides his bike to school a lot and has a knack for finding Goat Heads. After a few weeks of patching and re patching tubes, I picked these up. So far no flats Good: They seem to work as advertised Bad: They are heavier then a normal tube,

Riding in Chatsworth hills and simi hills you know how prone you are to minor pinch flats and thorn flats. I've had some of these tubes last 2 years. Regular tubes barely last 1 ride. I wont buy anything else for any of my MTBs or my friends MTBs.

I wouldn’t recommend in New Mexico. Had some serious issues with repeat flats while on the trail from goatheads. The slime just doesn’t work well with the conditions in this area.

Having a tubeless ready rim is ideal, but when the ideal isnt what your experiancing and the punctures keep adding up, this tube is a very handy option to have in your trouble shooting aparatus. I got stuck on a trail after a new set of tires were installed on my gravel bike. There were enough punctures to consume a whole patch kit for both wheels, and I had the luck of having this tube as my spare that day. After replacing it and clearing the tire of debris, I was able to limp back to town, nursing the front wheel every few miles to get back safely. Now most people would get rid of the tires, but here I found a saving grace in a slime tube. I am still on the tires and run slimes in both wheels and haven't had any issues since then! If you have a fussy setup, this might be a solution less thought of!

Had these tubes for years, riding my MTB up & down the trails, had few punctures & the slime did what it supposed to do it plug the holes soon I removed the poking objects, still haven’t change tubes. Sometimes i see riders on the roadsides fixing their flat tires such a big hassle.

I use Slime tubes for my commuter bikes. So much trash, broken glass and car parts on the city streets. Yep,their heavy. But I don't use them in my race/road bikes.

Bought this tube a few weeks ago. Easy to install. Have done numerous desert trail rides. No flats yet.

The SLIME self-sealing inner tubes were bought with the hope they would eliminate long walks home due to a flat tire. At my local bike shop the manager said the Presta valve stems were unsuitable for my use. I intend to return them for refund and buy Shraider valve stem tubes and apply the SLIME product.

Product provides excellent ‘FLAT TIRE INSURANCE’ - which is to say - if you out riding and get a puncture you likely won’t even know because the tire will seal itself. You want this - the Price at REI is the best I’ve found and, unlike elsewhere, the REI bike maintenance team does a first rate install for FREE.