Rene Herse TPU Tubes, 650B / 26'' Width:45 - 68mm the LS focuses on what

the LS focuses on what matters most: speed

They're breathable

They’re simple

The Sarto Raso is an endurance aero all-road bike that seeks to redress the balance between speed and comfort

which in plain English means whichever frame size you choose

Rene Herse TPU Tubes, 650B / 26'' Width:45 - 68mm the LS focuses on whatWe all know that tubeless tires are great for many types of riding, but you do have to top up their sealant semi frequently to keep things cush. For those who don't frequent debris strewn highways or other surfaces with a similar tire cutting nature, and if your tires are wide enough (so you don't get pinch flats), tubes are still a sensible choice. Now, the inner tubes of yore were made from butyl, and that was ok. But TPU Thermoplastic Polyurethane