I have used many different tire levers over the years. The park tool ones I have broken on a stubborn tire, but the koo stop levers have done the job over and over and over. I carry them with me all the time in my commute bag and trust them that if I get a flat, they'll get the job done.
It'll get your tires off, but durability is definitely an issue. If you have a stubborn tire, the cheap plastic will flex..I've tried Park Tool's levers and they're definitely more durable than the Kool Stop's.
I was struggling for an embarrassingly long time at home trying to fit ridden michelin road tires on new SH rims- one of the Kool Stop levers snapped in the process, and another (my fault) dragged across the RS rim sticker marring the overall look of new wheels.
Dug out my old Zefal flips and bingo - tire on. The difference i noticed was the Zefals were about half as thick as the Kool Stops- which made a world of difference with tires known for being very tight when new.
I've used a lot of different tire levers, and most simply don't work very well. The Kool Stop levers are by far the best I've tried. The design secret that makes them so effective is a thin but strong tip, that easily slips under a tire bead, and then stays there. The shape works so well that I routinely use just one lever, and zip tires off the rim (and using a second or third lever makes tight tires easy to work with). An absolutely great product at a great price.
Broke all three in less than three minutes. Iï¿½ve installed 50+ tubes and tires and am confident that these are poor quality. Some may say that Continentals are stubborn tires, but should that be an excuse? New levers did the job just fine. Canï¿½t recommend these.
have tried several kinds of irons and this one seems to work best for me. I carry one in my saddlebag and use it to quickly pry off the tire and slide it around the rim. I can get these under tires much easier than others I've tried. Not worried about it scratching carbon rims. I have broken a couple of these using them on brand new tires when on the road but for the most part they hold up well.
These are okay for the price. My main problem with this are that the ends that go between the tire and the rim and this kinda sharp plastic edge You can kinda see it in the photo. I accidentally sliced my tube with it. Ended up sanding the edges and it works better. I would pay a few more bucks for some better levers
I have tried a variety of tire levers and had less than good experiences when they snapped in two.
Then I bought the SPORT levers (before Kool Stop bought them) and they perfect. No scratches on the rim, easy to use and pack into a convenient holder. They are made in Holland, which is a country of cyclists, so they had better be good.
I own several of these sets. Over the years I have used a variety of levers. These are strong, sturdy and reliable. I have not broken one yet. I ride with one set and bought extras for each of my sons so they have there own cycling repair kits.
The Kool Stop had a winning, simple design developed a long time ago and it just works. Nothing has changed even with the advent of new rim designs and materials and these plastic levers don't damage carbon. They just work !