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Bicycle Tires - Gone Tubeless?

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    Bicycle Tires - Gone Tubeless?

    Long story short, I purchased a new wheelset for my Salsa Journeyman due to a badly mangled stock rear wheel. The new wheels came "tubeless ready" with Stan's Notubes Arch EX rims, tubeless rim tape and valves installed. I figured, "why not try it?" and ordered a set of Kenda Flintridge Pro "tubeless ready" tires (700x40) to go with the new wheels and a bottle of Stan's sealant. I read the directions on the bottle and watched a Park Tool instruction video on you tube and did the install. The initial setup went off without any problems. However, I'm not sure I'm sold on the tubeless concept, at least not with more road oriented tires. There are no obvious leaks oozing sealant and the bead around the rims looks like it is properly in place, but I loose quite a bit of pressure to leak down. The tires go from 40psi to 20 something within a couple days. So, I need to effectively pump them up for every ride. I did some searching after the fact and find a lot of conflicting views on whether this is normal or not. Lots of reports of variability with certain tire and rim combos sealing better etc. I've only ridden 25-30 miles on them so far and some accounts suggest they may seal better with more use sloshing the sealant around. Anyone else have experience with this? I can see this maybe working better with larger MTB tires that run at lower pressure and higher volume. In any case, I'm not in full regret mode, but tubes seem like a better option for me...

    #2
    That's not normal. I ride tubeless on my MTB and it will take months to lose 20 psi. If there isn't any obvious leak at the bead, I would suspect the tape or the valve stem. But if it's happening on both tires, I would think it's more likely the tape. I've had tubeless on MTB for 10 years now and have never lost pressure that fast unless there was an issue. I run 35 psi on MTB as I do it more for flat protection than traction.

    I run tubed road tires and on those, I will lose 10psi per week but that's at 100 psi and ultralite tubes.

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      #3
      Yeah, I generally have to pump up my tires before every ride. Well worth it though, tubeless is the bomb. I have NEVER ever had a flat or any issues whatsoever running tubeless. The only time I ever even got close to having a problem was on an 80 mile bikepacking trip on my fatbike and it got a hole from a sharp rock. It was spitting tubeless sealant for a bit but I shoved some pine needles in the hole and it sealed up with sealant and I pumped the tire up 2-3 psi and kept on going. Still running that tire.

      Kendas might not be the best choice in terms of reliability. Tubeless setup relies on bead design quite a lot as well as casing weave "tightness". You either end up with a tire that is thick and stiff and not at all fun to ride on so that it doesn't leak or a thin tire that might weep some sealant through the sidewalls.

      The best tire I've found so far in the 700c size is the Panaracer Gravelking 700x42. Run that on my road/allroad bike for a few years and have been very pleased. Once you go with a properly supple and lightweight tire you will be amazed at how much nicer the bike rolls along.

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        #4
        I go tubeless on my road bike and I have to pump them up before every ride. I've used Giant tires, Panaracer Gravelkings, and my current tires are Maxxis refuse.

        I have found that the more often I rode the less air the'd need. So if I ride once a week I need to pump them up. But if I ride 4 days a week they hold air and don't need to be pumped up.

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