Most of us have moved on from using inner tubes in our tires and have embraced the benefits of tubeless but there's still a value in carrying a tube in your back pocket or under your seat for a worst-case scenario to nurse you home.
Whether in your tires or on your body, it makes sense to get the lightest tube possible so in recent years we've seen brands move past the traditional materials of latex and butyl to use thermoplastic polyurethanes for tubes that are claimed to be both lighter and stronger than ever before. Tubolito was the first to market with the technology and Schwalbe released its own version with
the Aerothan in October last year. Now it's Pirelli's turn with the Smartube, which has taken inspiration from the brand's
World Tour tubular tire that was launched for the Giro D'Italia this week.
Pirelli says its tubes are made from a thermoplastic polyurethane (TPU), and that they will save up to 70% of the weight of a general butyl tube while being stronger at the same time. The other advantage these tubes have over a standard rubber tube is that they are claimed to take up 50% less space, meaning you'll have more room in your pockets or bags for other gear.
Three mountain bike options are available - 29x1.8/2.2 (claimed weight 75 grams), 29x2.2/2.6 (claimed weight 100 grams) and 27.5x2.2/2.6 (claimed weight 95 grams). These numbers are slightly heavier than the claimed weights for both Tubolito and Aerothan tubes but they are lighter than comparable latex tubes and they should also have better air retention (latex tubes typically need to be re-inflated before each ride).
The tubes come in Racing Pirelli yellow, have a 60mm valve and don't come cheap at $36.90 per tube.
I've never had a flat on my fatbike, but 90% of my miles are on snow. Before tubeless, people would tear their valve stems or get pinch flats running low pressures.
Don't get me wrong, I love cushcores, but the foam is not a replacement for air pressure.
So f*ck off with your stupid comment and shitty assumptions... I'm probably one of the least selfish riders out there... dick.
Also, who's more selfish, the rider who has his set-up so dialed that he doesn't need to carry a tube... or the rider who's bike is shittly maintained, doesn't ride with inserts, doesn't check their pressures and yet still doesn't carry a tube and then relies on other riders to give them a tube when they need it? Ha... f*ck off with your stupid bulshit...
If you held one of the Tubolito's in your hand, you'd quickly realize just how fragile that stem & the connection to the tube are. You could snap it just refolding it brand new... because if you plan on throwing it in a pack the way it comes rolled with the stem sticking out, you might as well throw it directly in the trash and save yourself the 100 or whatever grams altogether.
Oh, and that Tubolito is approximately 6 times more expensive.
You've obviously never seen my body. The weight of the spare tire is the problem.
I don't know why not everyone is using them, I just replaced mine once in those 10 years - because I switched from 26" to 29" wheels. Even if you get a puncture, they come with patches that work really well, so you basically can use that tube for many years and at the end it's way cheaper than standard tubes and the low weight and small size are so convenient, as you can carry them in your pocket.
Looking at nullifying the weight penalty of the actual armor with lighter tubes.. not sure which of the light tubes is best..
PS. What pressures are you running exactly?
I don't mind / care if the TA is less than its original thickness - as long as it has adequate 'cushion' to prevent punctures / slashes in the encased tube.
PS. CC is great.. you can ride out if you get a flat.. but it doesn't 'prevent' flats..
PPS. Another solution I was entertaining was running a super durable tube and no insert..
So far I've seen more failures than success with the raw innertube strapped to the seat when its needed. All of that being said im still not dropping $40 on a tube of any weight or size.
(This is a joke for those that can’t read sarcasm)