Dirkitech Posted October 30, 2014 Author Posted October 30, 2014 Maybe you pinching the tube when you put it in? Iv seen plenty times(even to me) with a tyre that fits tight onto the rim when you change it and slide that last bit over onto the rim there is a little bit of tube stuck in the way and it pinches it with a small gat that leaks slowly.thanks, I think i ought to test this with a few tire mounting drills. Thanks for the suggestion NRS182
rouxtjie Posted October 30, 2014 Posted October 30, 2014 what does your post have to do with the tire pressures affecting pinch flats that i'm querying? please don't reply if you can't help or contribute meaningfully.Oi Dirki....we have, RTFS pal... Everyone says go toobeless if you dont want pinchflats....yet you think we are here to convince you because you are still undecided. What is the saying, you can take a horse to the water... Now this is the part where I leave...goodluck with your pinchflat situation / problem.
NotSoBigBen Posted October 30, 2014 Posted October 30, 2014 One word: TUBELESS This! Or as my mates wife would say "I have 2 words for you tube less"
Dirkitech Posted October 30, 2014 Author Posted October 30, 2014 Oi Dirki....we have, RTFS pal... Everyone says go toobeless if you dont want pinchflats....yet you think we are here to convince you because you are still undecided. What is the saying, you can take a horse to the water... Now this is the part where I leave...goodluck with your pinchflat situation / problem.what is RTFS? I'm asking for opinions/expertise in dealing with pinch flats on a tire with high psi. Either I am doing something wrong, the tyre or rim is incompatible, etc etc. Going tubeless doesn't solve my problem (even if I could afford it- i'm not being spiteful by not having money for a set of road wheels/slime for swopouts/whatever). Also, I'd like to determine the cause of my pinch flats while riding at high pressures. If someone someday query me with the same problem I would like to be able to answer with "sure, let me help you. You know, we actually discussed this very problem on TheHub".
Raydek Posted October 30, 2014 Posted October 30, 2014 Ya, there are many variables. Decent rims and tyres make the set up far easier. Some rims and tyres just don't work well. Rims may state that they are 26/650 /29 but in practice they are not all the same. Same with tyres - some fit a rim tightly, others not. A couple of good tubeless rules/tricks. 1. Try and buy tyres with proper thick sidewalls eg WTB ,Conti protection range, Maxxis LUST and Scwalbe snakeskin or super gravity. Some older designs had flimsy sidewalls and leak sealant leading to burping off and/ordinged rims if you don't notice in time. Specialized tyres pump up easily but have the leaky sidewall syndrome. 2. The main problem I have encountered with tyres not seating when fitting them yourself is when the bead of the tyre does not fit over the rim strip tightly enough when the tyre is flat. Air just leaks out and soap does not help. Even a tight to fit stiff tyre is sometimes loose over the rim strip. A solution which has helped me 100% of the time is to wrap 2-3 layers of normal insulation tape over the rim strip. The tape just needs to go over the center of the rim ie over the spoke area and not into the bead so on narrower rims you may need a narrower tape. The effect of this is to cause a seal between the rim strip and tyre beads that allows the tyre to inflate tubeless and lock into the rim bead groove. Any opinions on my rims? Decent or not? What tubeless would work with them... OP, sorry about semi hijack.
Raydek Posted October 30, 2014 Posted October 30, 2014 what is RTFS? I'm asking for opinions/expertise in dealing with pinch flats on a tire with high psi. Either I am doing something wrong, the tyre or rim is incompatible, etc etc. Going tubeless doesn't solve my problem (even if I could afford it- i'm not being spiteful by not having money for a set of road wheels/slime for swopouts/whatever). Also, I'd like to determine the cause of my pinch flats while riding at high pressures. If someone someday query me with the same problem I would like to be able to answer with "sure, let me help you. You know, we actually discussed this very problem on TheHub". RTFS means "Read The F***ing Source" Thanks Prof Google...
Vangar Posted October 30, 2014 Posted October 30, 2014 3 months of riding tubed. About 5 pinch flats, 3 normal punctures, one bike. 3 bikes tubeless, two on Rim strips one on tubeless rims. 3 months of the same riding and harsher no flats and no maintenance, just checking sealant levels every month or so. Tubes=pinchflats at any pressures. And OP, if you want a Knobbly for the road pick up some Geax Mezcals, then you won't have to switch, they are perfect for anything but mud and thick sand.
jcza Posted October 30, 2014 Posted October 30, 2014 Is it Friday already? PS: Go tubeless.PPS: I see you're riding with flats, is that because you're walking often due to pinchflats?
Vangar Posted October 30, 2014 Posted October 30, 2014 Any opinions on my rims? Decent or not? What tubeless would work with them... OP, sorry about semi hijack. Give them a try. They should be fine, I have a set of Alex XD Comp and the very entry level Giant PC-R rims setup with strips. All you have to lose is the R300 odd for sealant (even that you can get cheaper, I love Joe's) and a bit of time.
V12man Posted October 30, 2014 Posted October 30, 2014 Dirkitect, on 30 Oct 2014 - 2:38 PM, said:what is RTFS? I'm asking for opinions/expertise in dealing with pinch flats on a tire with high psi. Either I am doing something wrong, the tyre or rim is incompatible, etc etc. Going tubeless doesn't solve my problem (even if I could afford it- i'm not being spiteful by not having money for a set of road wheels/slime for swopouts/whatever). Also, I'd like to determine the cause of my pinch flats while riding at high pressures. If someone someday query me with the same problem I would like to be able to answer with "sure, let me help you. You know, we actually discussed this very problem on TheHub".Unless you are overly large and like riding into road kerbs, high pressure is not the cause of your pinch flats. Pinch flats are mostly fairly distinctive in that you get 2 holes when it pinches - about exactly the width of the rim apart on the tube. If you are not getting these "snakebites" regularly (sometimes you only pinch one side, but more often than not it its both sides - then you are not getting pinch flats from riding - a lot more likely from mounting and dismounting tires - pinching the tube between tire and rim can last quite a while sometimes (I have had one last several hundred road km, with visible tube showing outside the tire (oops... my fault - quick tube change during a race)) Pay careful attention you are not creating the pinch when mounting the tires - make 100% certain the tube is free and out the way before pumping up the tire. The advice on baby powder is good advice - always follow that when using tubes - do not be shy - use lots of powder. The advice on swapping to tubeless is also good - although swapping tires around a lot is going to be a pain - you can recover most of the old sealant and reuse it, BUT you are going to have to wash the inside of the tire quickly or it turns into a mess....
NotSoBigBen Posted October 30, 2014 Posted October 30, 2014 But the amount of times I have seen guys riding and suddenly one of their wheels just starts squirting out sealant is a lot more.. What happens then? Bomb it? Tube it? Is this a common problem or these guys just not doing it right? Second best invention (ok maybe just carried over in a smaller version from the car stuff) must be tjoopless repair strips, saved my a$$ a few times
Dirkitech Posted October 30, 2014 Author Posted October 30, 2014 3 months of riding tubed. About 5 pinch flats, 3 normal punctures, one bike. 3 bikes tubeless, two on Rim strips one on tubeless rims. 3 months of the same riding and harsher no flats and no maintenance, just checking sealant levels every month or so. Tubes=pinchflats at any pressures. And OP, if you want a Knobbly for the road pick up some Geax Mezcals, then you won't have to switch, they are perfect for anything but mud and thick sand.thanks Vangar... I'll make a note of these tires when the tires are due for replacement. Thanks for the advice and suggestions thus far everyone. For the moment I'll check a second time when mounting the mtb tires for a pinched tube. V12man's theory sounds plausible at the moment. Maybe during mounting the tire it looks right on quick inspection, but cuts or blows when hit that first pebble. I'm happy about all the feedback and the things I can try out this weekend (not tonight, it's Winex time). Thanks everyone
Brian Fantana Posted October 30, 2014 Posted October 30, 2014 But the amount of times I have seen guys riding and suddenly one of their wheels just starts squirting out sealant is a lot more.. What happens then? Bomb it? Tube it? Is this a common problem or these guys just not doing it right? The sealant will plug holes up to about 2mm Ø most of the time. If the sealant does not sort the problem, you have plan B, you plug the tyre with a tubeless plug (takes about 10 seconds from stopping to completion). If you did not lose too much pressure you carry on riding, otherwise you bomb it quickly and you are on your way. If the plug does not sort your problem you have plan C, you take the tyre off, install a boot on the inside of the puncture, and bomb it. Sorted. If that does not work you have plan D which is a tube. I usually substitute plan D with "phone a friend" Sealant will only come out of the tyre if it is punctured. It does not happen spontaneously as you suggest in your post.
Raydek Posted October 30, 2014 Posted October 30, 2014 The sealant will plug holes up to about 2mm Ø most of the time. If the sealant does not sort the problem, you have plan B, you plug the tyre with a tubeless plug (takes about 10 seconds from stopping to completion). If you did not lose too much pressure you carry on riding, otherwise you bomb it quickly and you are on your way. If the plug does not sort your problem you have plan C, you take the tyre off, install a boot on the inside of the puncture, and bomb it. Sorted. If that does not work you have plan D which is a tube. I usually substitute plan D with "phone a friend" Sealant will only come out of the tyre if it is punctured. It does not happen spontaneously as you suggest in your post. Thanks for the info... I am less against a conversion now.....
MuddyMike Posted October 30, 2014 Posted October 30, 2014 I cant survive another thread like this........... . Enjoy your tubes......
Cassie Posted October 31, 2014 Posted October 31, 2014 I'm in the same boat, I don't see the benefit of tubeless.. It just seems like a mission... I am running as low as 1.8bar (26psi) with tubes in Conti Race Kings 29" x 2.2 and have had maybe one flat in a year.. And I HAVE HAD ZERO FLATS IN FOUR YEARS....try and beat that!!!
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