Its not just the weight, do a bit of research and you’ll find out.

They’ve been around for years, nothing new.

Cheaper to stop eating pies.

Lols as if making your wheels 50g lighter makes a difference.

Lols as if making your wheels 50g lighter makes a difference.

Comparing them with a 100g tube doesn’t really make sense, as they’re also more durable- realistically you’re saving 200g, 250g an end over a tough tube.

That’s assuming they work as claimed anyway, some reports say not.

Just the same as with tubeless- people miss the point and say “it’s only slightly lighter than my weightweenie tube”

I assume your bike is 80lbs and uses solid steel bars, rather than tubes? 🙄

Are those the ones you can repair by warming up with a lighter?

I don’t keep my poo in my tyres.

WTF am i the only one, its the only way to ride a 29er.

I struggle to justify spending that much on a tyre, so to spend it on a tube seems ridiculous to me. I find that tubes need replacing, not just because they’re punctured or sliced but because the valve breaks/ snaps or something else, so unless they’re after-sales is amazing and they can guarantee puncture resistance, they’re not worth the money.
despite what others have said, they’ve only just got a UK distributor which is why most of us haven’t seen them before and why they’re being reviewed by mags/ websites.

I had this debate with someone on BR last week… on what basis? There’s scientific and real world studies out there showing that it makes little difference, and that saving weight is good regardless, targeting it on the wheels doesn’t really make much more difference.

Fit those folding tyres, then add the weight saved back onto the bike elsewhere.

16 times more improvement from lighter wheels. No way, that’s mental.

They need a better logo. Maybe I should contact them.
The last thing they look is Swiss!

I’m just thinking through the ‘ounce on the frame = a pound on the bike’ thing… My Powertap wheelset adds about 1.5lbs over my very modest Race X Lites, therefore by fitting the Race X Lites I save the equivalent of 24lbs, so the bike actually weighs -6lbs. If I went for a light set of tubs I could save an additional 1.5lbs, so then it would be like saving 48lbs off the bike, so I’d lose 2 stone.

What a brilliant weight loss concept!

I’m definitely the former, just saying that there’s plenty of evidence out there that suggests the benefit comes from saving the weight, not from saving ‘rotating’ weight specifically. Ie if you can save 200g on your saddle and 100g on your wheels you will go faster with the lighter saddle.

I agree that when I switch wheels on the MTB the bike feels incredibly different, but that doesn’t necessarily translate into big speed differences, and I don’t know what happens if I use my race wheels and stick some weights on the frame.

Edit: here is some real world testing (rather than theoretical models), which shows that it doesn’t make all that much difference. The lighter bike is 4% faster, but moving that weight to the wheels only makes you another 0.9% slower, which suggests there’s about a 20% benefit in saving rotating weight over weight elsewhere, not double, triple or 16 times.

Just sayin…

No maybe about it. At the very most it’s only 2x, and that’s only if you only consider the effect upon acceleration to be important – if you’re actually bothered about lifting the weight up climbs, then it’s only 1x wherever you put the weight.

These sort of products give me hope, if something this utterly overpriced and with marginal benefits can get into production, surely some of my own stupid ideas have a good chance too…

What do I really want from a tube?

I’m most interested in it holding air, not getting holes in it when pinched or poked with pointy object, costing a sensible amount, low weight is far down the list TBH…

The “Lighter than Tubeless” claim is an interesting one, I mean tubeless isn’t really about weight saving but this £40 tube would basically replace 2 ounces of Latex sealant in a tyre right?
2 ounces = 56.7 grams, so a lightweight tubeless setup could still deliver similar weight (it’s all about tyre selection really)….

Saving an estimated 100g on a couple of tubes is great, but if it’s more likely to pick up a flat then where is the real race advantage?

Latex Sealant does also slop around and add frictional losses from it’s viscous interaction with the inside of the tyre. I have to go now, conducting some experiments actually, scientific and repeatable ones. Maybe I can re-use the method here 🙂

Toodles, I’m off riding [to get there, that is]

I have no valve caps 😉

Do the same people who think rotational weight is important also think fat tyred bikes in multitubed steel frames are great too. Add the weight of mud flicked up onto your bike and clothing and you still end up heavier anyway (whatever you ride) unless you just ride in the summer on dry dusty trails. I’m not saying who,s right or wrong just wondering thats all. 😕

If you’ve spent £40 on a tube you’ll damn well patch it I suspect!

Easier to repair than a tub, perhaps if they’re kept for racing use only. As Northwind said they’re meant to be a lot tougher than butyl tubes.

thinking about it, the mountain of punctured tubes sitting at the bottom of my cupboard must have a replacement value of £40-60… at £4/5 a pop.
So if they are truly durable (including the blinking weak presta valves) then maybe they are worth a punt if you can never be bothered repairing tubes.