I purchased the Michelin C4 Airstop tubes to accompany new Kenda K847 Kross Plus tires. The standard weight tube provides solid no leak performance. They were easy to install and hold up well under harsh riding conditions.
This tube does not fit my 559 rims properly. Way to wide and poor quality. You get what you pay for. I paid more for 2 proper sized and fittting tubes from another cycling shop and gave these away to a neighbor that used them for his beach cruiser. Fit perfect for his 26x 2.125 tires and rims.
Had these for a couple of months now, replaced my old tubes with these when I got some new tires. Easy to fit, love the Presta valves. Got 3 so I can keep a spare on the bike.
This tube was manufactured to fit the Michelin Country Rock tires that I bought. After assuring that the first purchase of the tubes and tires were matched, I purchased extra spares. It is hard to go wrong with a name like Michelin.