PirelliP Zero SmarTUBE RS 700c TPU Road Tube(Return to Product Page)

I had high hopes for this product. Bought a set of these for my TT bike as they tested fastest by BicycleRollingResistence.com. However, upon the very first use, while my bike was sitting in the stand pre-race, the rear tube simply popped! Thankfully I still had time to swap it out and make my start. Because my confidence was now shaken I also swapped out my front wheel for my backup as I didn't trust the tube. It was an extremely warm day, but I even consulted Pirelli about whether I should compensate tire pressure due to the heat. They suggested a couple of psi lower, which I did. Later upon examination, I discovered that the rear tube failed right near the valve at the edge of the reinforced circular section. Don't know if this was a freak one-off or an inherent weakness, but it is hard to recommend the product after this experience. The good news is that BTD gave me an immediate refund after I notified them of the failure. The tube I had in the front I now keep as a spare for now.

Wanted to pair up these tubes with the RS tires for summer riding KOM hunting. It tells you not to use with rim brakes, but one month in with some hard braking no issues. Wish there were more options for valve stem sizes as the 85 seems too long for my 50mm wheels. I usually use the pink tpu tubes sold on amazon for half the price and they have a 65mm valve option which is ideal, any savings in weight on the pirelli tubes is probably lost by extra valve length and not as aero.

Im all in on tpu and after 2 seasons on pirelli p-zero smartubes ended with a failure at the valve flange and unexplained leaks from rim side of the tube, and a few months on tubolito-S ended with a glass puncture and then tiny holes I was unable to patch on a new tubolito-S I have moved onto these. I was going to get the new Silca tpu tubes but after seeing these as the fastest tpu tubes on bicyclerollingresistance.com I went with these instead. Easy install. Feels smooth and fast. No problems yet. Valve resists connecting to my floor pump a little but not bad.

Installed 2 and one was flat before the first use. Found a small hole so not much confidence especially at this price

These are the best tubes I have ever, ever, ever had. I've only ridden for 30 years, but I love them.