The Undeniable MTB Tubes are often an afterthought. &';It&';s the tires that matter, the tubes are just standardized materials&';. However, what if the tubes were more? What if they were made specifically for the trail? This is why Conti designed the MTB tubes. Featuring mold cured construction, with seamless extruded and removable valve cores,Conti Tubes are a step above the rest. You&';re not on standard rides, so don&';t let your tubes be standard. Grab a pair of Conti MTB tubes and be better than standard. Features: Preferred by champions and riders worldwide Creates a consistent tube that is perfectly round Continental 182311 Bicycle Tube Suitable for Mountain Bike tyres. Valve: Presta 42mm ETRTO Size:47/584 Size: 27.5 x 1.75 - 2.5