Silca introduces Ultimate TPU tubes
Silca has released TPU (thermoplastic polyurethane) inner tubes built from clear, unpigmented thermoplastic elastomer with a mechanically bonded aluminum valve to address stress failures in the area.
The American brand said the 24-43 mm tube with a 50 mm valve weighs 45 g and saves two to four watts compared to a butyl inner tube, and is within 0.2 W of latex. There are two tube widths and accompanying valve lengths on offer: 700×24-43 mm with 50 mm or 70 mm valves and 700×44-64 mm with a 50 mm valve (62 g claimed). The tubes are disc and rim brake compatible.
The tubes are made in Germany, and in addition to their aluminium valve comes with a removable core and valve extender compatibility, and each box contains a basic patch kit. And the price, it's US$39/£37 per tube.
