Tire Insert, No Flat Bicycle Tire Inserts, Puncture Proof Bike Tube Protector, Stops Flats from Thorns and Goatheads

It's honestly perfect. There are a lot of 1 stars on this but that comes from people not knowing what they're doing. It's 100% hard to put on and it's not going to be easy, but I've had these on multiple bikes and the only time I've had to replace a tube, was because I was stupid installing it or pumping it up too much. I would spend so much on tubes before buying these and now it's just because of user error, when a flat happens. Not from riding on the road. I've ridden over metal sheets, hit unexpected raises in sidewalk that sent me jumping and landing hard, and ridden through many a construction site without issue. No pinch flats from the drops, no punctures from the debris, no leakage from the the tube if installed correctly. I had a dime sized hole in my tire last winter, for the entire winter. I get tires locally and they were closed but I still rode all winter with a hole in my tire, and this protected it perfectly fine. The thickness of the insert helped perfectly and the feel of it was perfect. The only downside to it is that it adds to your wheel weight, but that's something made up for in pedaling and getting used to it. Otherwise the functionality is perfect. If you don't know what you're doing, have a shop help you. If you're confident, then make sure that when everything is attached, you make sure that the insert is properly rested in the rim. I had to use a tire lever to help feed it in but it works. Just be careful pumping it because it should be about 10-20psi under what it normally gets pumped up to.

It's been about a year and I've only gotten 2 flats. Now before hand I was averaging almost 2 flats a month. I believe it was a rim issue and I fixed it. Still I would save i love the safety this protector gives me. I was running the wrong size tube for almost 8 months now (making it more susceptible to pinch flats) and it still lasted a good 6 months now flats. Important to mention I'm on an ebike with backpacks on it can get real heavy. Handles it, plus when I do get a flat saves the rim from getting bent. My knucklehead family member decided to bike home on the flat and didn't even notice!

良い。29erと27.5を買ったが29erのほうが取り付け辛かったような気がする。ビードワックスとヘビーパウダーなどがあるとすんなりと入る、シュワルベのタイヤレバーがあると便利。クロカン用のペラペラタイヤでもコシが出て下りで安心感がある。

Los coloque en la bicicleta de mi esposa no se ha ponchado durante mucho tiempo, eso sí son un poco difícil de colocarlo pero son excelentes. Lo volvería a comprar.

I was tired of having frequent flat tires on my bicycle. I've ran slime in the tubes for years, but eventually I would still get flats. Grass burs and goat heads are the primary causes for my area. Once a tube with slime sprung a leak, they have been impossible to get a patch to stick. I tried going back to regular tubes but that didn't last a week. Next I tried Slime's tube liners. They were pretty good, but not long enough to cover 29" tires and tubes. I still got occasional flats. Finally I decided to try these. Yes, they are difficult to install. They are not impossible to install though, and worth every penny and the time to install. The technique is the most important, but it also takes some hand strength to get them stuffed inside the tire. Now that they are both installed, I expect it to be years before I have another flat tire. I can't tell any difference in the rolling resistance or handling. I can't feel the little bit of added weight at all when riding. I actually think they have improved riding over bumps. My bike now has less bounce and more dampening. Even though these are expensive, I highly recommend them! Update: it's been around 10 months since I installed these. I ride almost daily, typically 2 to 3 times a day when I walk my dog. I have not had a single flat tire in those 10 months! I've had to add air to the tires twice now, only because tubes naturally lose air over long periods of time. Before these, I would have a flat tire at least once a month. If these have saved me 10 tube repairs or replacements, they have paid for themselves considering my time plus the cost of tubes. The fact that I haven't headed out the door with my dog only to find a flat tire is basically priceless. Get these! They work!