Which latex tubes for 28mm Tyres
Moderator: robbosmans
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tubolito Tubo-ROAD are good for 28's and only weigh 33 grams (latex are approx 85 grams each)
https://www.rosebikes.com/article/tubol ... id:2696948
a bit pricey though, but I will try them with Specialized Turbo Cotton tyres (24 wide .... they measure 27mm wide on my HED Belgium Plus rims .... 33 grams is the same weight as sealant used in 25mm tubeless tyres so the Turbo Cottons should be very fast (I've used them with normal tubes, and they were very quick compared to other tyres that I have used (including GP4000 SII and Vittoria Pave
https://www.rosebikes.com/article/tubol ... id:2696948
a bit pricey though, but I will try them with Specialized Turbo Cotton tyres (24 wide .... they measure 27mm wide on my HED Belgium Plus rims .... 33 grams is the same weight as sealant used in 25mm tubeless tyres so the Turbo Cottons should be very fast (I've used them with normal tubes, and they were very quick compared to other tyres that I have used (including GP4000 SII and Vittoria Pave
Trek Emonda SL6
Miyata One Thousand
Miyata One Thousand
Science was not my favourite subject at school, but I thought that rotational mass is what makes a huge difference on a wheel? .... The tube is not in contact with the road, the tyre is, so I struggle to understand how the tube has a higher rolling resistance?
Trek Emonda SL6
Miyata One Thousand
Miyata One Thousand
not weight related.
It's the energy needed to deform the rubber (to comply the road or anything you run over) and energy needed to return back to their form.
thinking of throwing a rubber ball to the ground, it keep bouncing to a less height every time it bounce until it stop at the ground. The energy is lost somewhere in the deforming process, and that also happen when your rubber roll and deform on the road. The side wall suppleness actually contribute more to rolling resistance of the tire more than the rubber thread that touch the ground, IME.
Latex tube tube weight 70g is still faster than Ultra light Butyl tube that weight 55g simply because Latex is more stretchy and require less force to deform and return to their shape.
It's more like 0.8 watts per tire https://www.bicyclerollingresistance.co ... s-clincherhannawald wrote:it does. Lazy to google it, but you will find explanation online.. they say (measured) that latex tubes has 2-5Watts advantage to butyl tubes per wheel..
rotational mass is important for acceleration..
That's not much and I might switch back to lightweight butyl. I'm getting tired of pumping tires for so little gain that I probably wouldn't even notice. Latex tubes lose a lot of air overnight. They also can't take the heat as well as butyl does.
I used to pump light butyl before every ride as well..MikeD wrote: ↑Fri Jun 04, 2021 3:08 pmIt's more like 0.8 watts per tire https://www.bicyclerollingresistance.co ... s-clincherhannawald wrote:it does. Lazy to google it, but you will find explanation online.. they say (measured) that latex tubes has 2-5Watts advantage to butyl tubes per wheel..
rotational mass is important for acceleration..
That's not much and I might switch back to lightweight butyl. I'm getting tired of pumping tires for so little gain that I probably wouldn't even notice. Latex tubes lose a lot of air overnight. They also can't take the heat as well as butyl does.
There's a difference between a few and a lot of pumps.hannawald wrote:I used to pump light butyl before every ride as well..MikeD wrote: ↑Fri Jun 04, 2021 3:08 pmIt's more like 0.8 watts per tire https://www.bicyclerollingresistance.co ... s-clincherhannawald wrote:it does. Lazy to google it, but you will find explanation online.. they say (measured) that latex tubes has 2-5Watts advantage to butyl tubes per wheel..
rotational mass is important for acceleration..
That's not much and I might switch back to lightweight butyl. I'm getting tired of pumping tires for so little gain that I probably wouldn't even notice. Latex tubes lose a lot of air overnight. They also can't take the heat as well as butyl does.