So what is the lowest pressure that can go into tubeless tires ( ust, stan's or ghetto)??
Thanks.
Thanks.
If your using a stans kit, It will hold, I cannot say for the other systems, I dont have eany experience with the others. Like others said you will roll the tire if your too low which is more of a concern with the lower pressure than burping air. That part I didnt mention in my first post.
The real question for yourself is, is it worth the hassle for you? I used to run stans, I have since gone back to tubes in my tires. With Minions I can still run 25 lbs without any problems.
Ok, I cant tell a difference in rolling resistance at all between tubed and tubeless. But what I can tell, is the bigger range of pressure you can run without worring about your tube. I hear what your saying about pinch flats not being as common with the proper setup, but I see it where people are running a good tire, tubed, with less pressure than it is supposed to have, and those are the ones getting pinch flats. Even myself, I run less than the min pressure reccomended, specifically, My rear tire is a Maxxis Minion, and I run about 28 lbs, Min is 35 lbs.
But hey proper setup, good tires and its all good. Ok I am rambling on a bit, its all good.
FWIW last time I pinched, I tore off a chunk of my wheel.
Yeah, it was, but it was an answer to the question, It was sloppy muddy, and it was about the only way to get any kind of traction at all. It worked for the ride in question, and I couldnt imagine running it that low for any dry condition out there. Like I said , normally I am running about 28 front and rear.Sorry but a 252 lb rider with 18#'s of tire pressure is ridiculous, especially on 2.5 Maxxis!
Well, ok lets get overly technical then, I do not advise running less than 25 lbs on any given tubless system, When I an 18, it was on a stans kit system on Sun Singletracks. Now lets also go back to my original post, were I talked about the lowest pressure you can run will be dependant on total tire volume, VS total rider weight, I will add now that it will also depend on the construction of the tire as well.Ok so a freak occurrence happened to work for you one time and now you are advising others it's the low pressure threshold for tubeless? Come on 18#'s is retarded. Do your fellow riding buddies run 18# in sloppy conditions, and or have you ran 18#'s more than once? May be if you and several other riders that you know had consistently run 18#'s,,, may be then it would be worthwhile advice? I am not saying you're full of it either......... just that you might word your experience differently, because it's way out of the normal range for tubeless pressures.
the friction created by a thin road tyre in tube in relation to your weight is a lot less and therefore a lot less relevent and noticeable.I do not belive for one second that the advantage of tubeless is lower rolling resistance. Been demoing a set of DA tubeless wheels on the road bike, and guess what, top speed down My favorite decent is the same, but its one hell of a supple ride, better quality of a ride, feel better connected in teh corners. Roll faster, no, feel better, yes.
If you want lower rolling resistance, raise your air pressure.
the friction created by a thin road tyre in tube in relation to your weight is a lot less and therefore a lot less relevent and noticeable.
The friction is created by your tyres profile changing as it contacts the ground, the tyre then makes the tubes profile change by friction. As the tyre deformes, the tubes shape resisits it and energy is transferred from the tyre to the tube.
When you pull your pants off, and your underwear comes down also, you are wasting energy pulling down the underwear, compared to pulling pants down without underwear.You are adding another surface area contact patch,Same with a tube.
UST tyres are genrally better I've found for not burping because they're genrally a smaller inside diameter(harder to get on rim).
Put the effort in, make proper rim strips from 20" tubes(Ghetto Pro)and use UST tyres and sealant(hardest tyre you'll ever install with the rim strip)for the most bulletproof cheap set up. Run UST tyres on 823s for the best strength/weight/reliability.
I'm 68kg and run 25f and 28r with 823/UST 2.5 Maxxis on DH bike,
and Ghetto pro with Stans and 2.1 Z-Max on my do it all hardtail, that I DHed on(rather slowly) on 30PSI r and 38F last weekend with no issues and feeling the rim bottom out a few times.
You mean those Michelin tyres that are utterly identical to the ones they first bought out 10 years ago?The new UST tires mare much, much better than when the technology first came out
185lb and above 22lbs - 30 preferrably towards the 30 mark.
Im 220 raw and 26 is my magic # on maxxis DHF 3c DH casings (syncros dps 32 and dt 6.1 hoops).
It avoids the sidewall roll over and squish as well as tracks spot on, it still allows rocks to contact the center of the rim depending on terrain and riding style.
I run 28-30 at tamarack, tunnel and brundige the rest of the rides have been 24-28. When running tubeless the different pressures are more noticeable than a tubed set up due to the less material between rim and outside.
DH tyres are genrally thicker walled and offer performance as well as punctture resistance.My first post on ridemonky,
I set up ghetto tubeless to experiment with weight savings:
I'm 170lbs without gear
Maxxis DHF 2.35" single ply folding bead front n rearThis is obviously not a DH worthy tyre, and you could have had the exact same problem you did with a tube. You no doubt would have flatted more often anyway, and if you added up all the time lost, I'd say you still would've been better off with the tubless set up. Tipping out sealant is the only inconvenience you suffered due to your set up Vs a tube in there.
wtb laserdisc FR rims
ghetto tubeless using stan's sealent and 16" bmx tubes (these work better than 20")Interesting, I may try this, would be lighter, but harder to cut down as a rim stripaccuratly(ghetto Pro stylee), but would be better for lazy Ghetto style and the tyre would go on a tad easier, although not seal as well by a tincy wincy bit.
When you're up high on the trail, sealant ****ing sucks. So much so that I have gone back to xc tubes with thick casing nevegals. The benefits of no pinch flats and losing almost a pound of weight off the bike are more than offset by the pain of getting a flat. I'll take performance gains when ridding over a messy inconvenience any day.
If you're going to do tubeless, you're trading inconveniences of pinch flats for semi-unrepairable situationsIf using the same tyre, you'll get the same damage, just carry a spare tube as you would running a tubed set up, you'll still get all the tubless bennefits, but you may get dirty hands, but less often. If you're doing to do it and your riding style is close to aggressive, use the thick casing tiresThis is the DH section,always use a thick cassing tyre for DH, but say goodbye to the weight savings.
My first post on ridemonky,
I set up ghetto tubeless to experiment with weight savings:
Maxxis DHF 2.35" single ply folding bead front n rear
the rear would burp at 25psi. ...
burped twice at lower psi on the rear...Ripped the rear dhf wide open in a high speed section of freight train on whistler.
I have gone back to xc tubes with thick casing nevegals. The benefits of no pinch flats and losing almost a pound of weight off the bike are more than offset by the pain of getting a flat.
If you're going to do tubeless, you're trading inconveniences of pinch flats for semi-unrepairable situations, but less often. If you're doing to do it and your riding style is close to aggressive, use the thick casing tires, but say goodbye to the weight savings.
Well you summed that a lot shorter than meuhhhhhh...ever stop to think that the issues that you experienced just might have a little to do with changing from DH tires to XC tires????
Next time you do some experiment of any sort, you might want to think about controlling some variables....
your experience is tire casing thickness related and has nothing to do with tubeless or tubed!!
i never have had trouble with tires burping, but i definately prefer michelins casing. only if they weren't so expensive and aren't a bitch to mount up.With Michelins I could run as low as 20psi NO worries. With Maxxis I tend to burp even at 30psi sometimes.
Read much ? I stated exactly that in my post. I also saved a pound of rotating/unsprung mass from my bike in doing so.uhhhhhh...ever stop to think that the issues that you experienced just might have a little to do with changing from DH tires to XC tires????
Next time you do some experiment of any sort, you might want to think about controlling some variables....
your experience is tire casing thickness related and has nothing to do with tubeless or tubed!!
Nope, did it hucking a rock chute at Big bear. Fired off the top full speed and landed mid chute (A$$ load of rocks) full speed ahead and hit a huge rock! Rode it out but had to tube it to ride the rest of the day as it wouldnt hold the tire for tubeless .Was that from when your tire let out that big ass Fart at FOntana????? That was funny ****
Read much ? I stated exactly that in my post. I also saved a pound of rotating/unsprung mass from my bike in doing so.
Also, a DHF is not an xc tire, it's a DH tire, as labelled. It held up very well until I ripped it open in a fluke situation. FYI I have also ripped open thick casing tires.
The end result with single ply tubeless setup was overall good, but the mess of changing a tire and trying not to get everything dirty put me off the "performance" gains. Really I didn't feel any gains, but perhaps I'm not good enough to feel those over the conventional setup. Since I went back to thick casing tires and tubes, I didn't want to gain a bunch of weight back on the bike so I took off the 66's and put on a boxxer worldcup.
Which trail? Toilet Bowl??? Pirate???Nope, did it hucking a rock chute at Big bear. Fired off the top full speed and landed mid chute (A$$ load of rocks) full speed ahead and hit a huge rock! Rode it out but had to tube it to ride the rest of the day as it wouldnt hold the tire for tubeless .
Dont remember, schwinnstr8, overtheedge and someone else was there. They'd know.Which trail? Toilet Bowl??? Pirate???