Tube 26 x 1,75-2,50 AV 40mm MTB CONTINENTAL 200g Continental is one of the world's largest tyre manufacturers. Over 100 years of experience allows us to offer our customers products best suited to their expectations. High quality translates into the comfort of use of each product of this brand. Bicycle inner tube by CONTINENTAL Tube Size: 26” x 1.75-2,50 (559 x 47-62) Weight: 200 g Vent: AV 40 mm AV / SV / CAR ventilator o length 40mm allows pumping the inner tube with a compressor, at any gas station or with any hand pump. Compatible sizes: 26" x 1,75" (47-559) 26" x 1,9" (48-559) 26" x 2,0" (50-559) 26" x 2,1" (54-559) 26" x 2,2" (55-559) 26" x 2,3" (57-559) 26" x 2,4" (60-559) 26" x 2,5" (62-559) ETRTO is the European Technical Organisation ds. Tyres and rims. The size ETRTO is the best size with which we can check whether the inner tube we buy has the same size as the one we currently have on the bike. These are numbers written on the tire in the same format as the zip code, for example 32-622. This means that the tyre is 32mm wide and fits rims with a diameter of 622mm.