Schwalbe - 12 x 1.75-2.10 Presta Valve Inner Tube
The 12 x 1.75-2.10 Presta Valve Inner Tube from Schwalbe is a good value inner tube which is extremely reliable and extremely air tight. Each Schwalbe inner tube is individually examined twice at the factory to ensure air-tightness. This special quality control prevents any unpleasant surprises. These inner tubes have been made using a unique rubber mixture which gives less air loss, meaning you need to pump your tube up less often.