The P-Sens inner tube from Tubolito is the world’s first to feature smart technology, namely an NFC chip that communicates with your smart phone to keep you informed about tire pressure in real-time with precise readings from inside your wheel. Available for mountain bikes, the tubes come in 27.5 & 29” sizes and the chip assembly only adds 10g of weight to your bike. Simply tap your phone against the tire & it sends an instant pressure reading notification to your phone.