Simply Cycling 27.5 Inch x 1.5 Inner Tube with Schrader Valve

Simply Cycling CC009 Inner Tube, 27.5 Inch, Schrader ValveTwenty seven and a half inch, also known as 650b, is most associated with mountain bikes, though increasingly fitted to hybrids, commuters and gravel bikes. This tube is the 1.5 width, which suits the narrower tyres those bikes run rather than the wide tyres fitted to a trail mountain bike. Simply Cycling Inner Tube is made from butyl rubber and air leakage tested, so it holds pressure between rides.Which valve do I need?This is the Schrader version, and on a 27.5 bike that is worth checking carefully. Schrader is the wider valve, the same type used on car tyres, and it takes any standard pump including a petrol station airline. But many 27.5 mountain bikes are built with Presta rims, so the valve is not a safe assumption at this wheel size.The way to check is to look at the old tube or the hole in the rim. A Schrader valve is about 8mm across with a small pin in the centre and a threaded outer sleeve. A Presta valve is narrower