Its always a good idea to carry spare innertubes wherever you ride for quick and easy roadside fixes. Nutrak Innertubes are high quality without the price tag. Welded butyl rubber offers a sturdy construction. No matter what wheel size youre riding there is a Nutrak Innertube for you from 12wheels for kids bikes to 700c road bikes and 29mountain bikes. Key Features Available with Presta (PV) or Schrader (SV) valvesA high-quality inner tube at a reasonable priceWelded butyl rubber constructionGreat value replacement tube