Continental Race 28 700 x 20-25c Bike Inner Tubes - Presta 80mm Long Valve by by

This was an amazing price for 80mm stemmed tubes. These are the "race" version, which feel a bit thinner than regular tubes and do seem to flat much more. I ride 100-120 miles a week and probably flat every third ride with these and most often don't find a thorn or glass or anything in the tire/tube itself. There's just a hole or a slow leak after the ride.Additionally, the quality control of the consistency of the tube walls construction is marginal. Every tube has sections that bulge when aired up and sections that don't. Most often this doesn't cause any perceptible wobble in the tire, but it does make me think the uneven thickness of the tube walls has something to do with the frequent flats. See the photo for what I mean.

They do what they are supposed to and work like other road tubes I have used. I just recently purchased Superteam carbon wheels that have 50mm aero and these work great with them. The only bad thing is that I didn't realize they were not threaded and they thus rattle a little bit in the rims.

These tubes have the all important removable valve core. May not mean much to most people but it really opens up the versatility of these tubes.For the going rate these tubes can't be beat. About same price as the other brands but these have the removable core a solid reputation.80mm valve stem tubes work great on 60mm wheels.

I bought 5 of these three weeks ago and they are toast, and it’s not an issue with my wheels or tires. After about 15 commutes, 5 flat tires. So the question isn’t are these worth the price, but how much would I accept in compensation for a 1/3 chance that I get a flat tire, every time I ride. Or qualitatively, how much is it worth to have the pleasure of my ride interrupted by a flat tire every third trip. The answer is that it’s not worth it, even if they gave these away for free.

They are not any lighter than normal tubes that I was getting from the shop. I think the race refers to the narrowness of the tube which would be used for 23c tires, the tires you would use if you were racing. I don't think they're any thinner than normal tubes. If you want to get their light tubes you should get the "race light" or their "super sonic" which is their own version of latex but with a different material than latex.Also a tip. Conti tubes are notorious for failing around the valve, at least they are for me! So when you pump up your tires make sure you put the pump nozzle on gently.

I have carbon fiber wheels and so I was looking for tubes with a longer valve stem.These stems are extraordinarily long! I’m talking about 1 1/2 inches to 2 inches past the rim when they are installed.In addition, it is very difficult for my pump to get a grip on the valve stem. I have a high quality pump and there is not enough thread on the stem for the pump nozzle to get a good grip on.I guess these will go to Goodwill and I’ll go buy something to better suit my needs.

Bueno la verdad yo había leído de los usuarios que compraron este artículo de cámara y desian que no compraramos este artículo y que era una por quería y no servía yo las compre asiendo caso omiso a esos comentarios pues aora que las quise usar o sorpresa y nomevan a creer pero en cuanto las monte en mi visi semerompieron cuatro compre seis desiditirar las otras 2 no tenia la pena montar las iseguirme moles tando me porlamala calidad de las cámaras y si piensan que las infle demás están equivocados simple mente no sirven o cuanta rason tenían los usuarios con sus comentarios mearepiento de averías comprado amigos

These tubes simply rip open a gash in the rubber. The rip was not caused by a puncture through the tire. Perhaps the rubber of these inner tubes are old and "expired". Unfortunately, unlike car tires where you can determine the manufacturing date, there is no manufacture date on these inner tubes.

The tubes are excellent - I've had fewer punctures on my road bike with these than I think any other brand I've tried. However do check that the exact size and value length you are shipped matches what you ordered. For this order I got the right tyre circumference shipped by the wrong valve length - which is important for your road/TT bike naturally.

Having run through my most recent 5 pack I'm starting to agree with other reviews here questioning the legtimacy of these being Continentals (if Contintentals are meant to be as good as people say). To be clear I haven't used any other brand since taking up cycling.The last 2 on my front and back tyres are losing air too quickly, I use scwalbe endurance tyres so I am doubtful it's a puncture (I can't hear or see anything from the tyes). I had one valve break off completely after using a hand-held pump on it, maybe I was too rough. In the pack there was some variation on valve length from box to box which I am sure in and of itself isn't suspect but I don't know I am just iffy about buying these again. Decided on a different brand and seller this time.

These inner tubes are truly awful. They cannot seem to cope with any decent air pressure. My normal bike pump, which usually works fine cannot seem to get it up to a decent pressure. After trying a better pump the pressure very quickly fell out of the tyre and I had to pump the tyre up before every journey (3-4 times a day)

I had two blowouts on a brand new bike and quickly used these tubes in my new wheels. So far so good. I have had no issues at all, and I've ridden close to 200 miles.They handled the hot weather fine, and I've had some hard impacts on pot holes which they've survived too. I'm running these in 25mm tyres at 95psi. They come fairly compact, which is good as I can fit 1 spare into my saddle bag.

I bought this for my brother who is big into cycling and we open the first box and there was a massive hole in the tire so I was very disappointed about this I will look for a different supplier to buy this next time