Greg29 Posted June 12, 2015 Share Nothing beats the good old 'squeeze the tyre' test! Link to comment Share on other sites More sharing options...
worriesnot Posted June 12, 2015 Share what is most surprising is that it actually did quite well! The sidewalls didnt really buckle going around corners. only the steep cornering descents were too much for it...yes those Saguaro's are awesome.i'm 98kg and run 1.8 front and back on Giant PXC2 29er's with no issues.i thought something could have been wrong with your pump or something since "the guy whose name we can't mention" at Summit Cycles put mine on and said he was surprised how easily they went on.really strong side walls that stand up to a lot BUT running them at 1bar obviously was a little too much (or too little should I say ) glad you got it sorted - many happy miles... Link to comment Share on other sites More sharing options...
Rocket-Boy Posted June 12, 2015 Share yes those Saguaro's are awesome.i'm 98kg and run 1.8 front and back on Giant PXC2 29er's with no issues.i thought something could have been wrong with your pump or something since "the guy whose name we can't mention" at Summit Cycles put mine on and said he was surprised how easily they went on.really strong side walls that stand up to a lot BUT running them at 1bar obviously was a little too much (or too little should I say ) glad you got it sorted - many happy miles...Interesting that, Im a little lighter at 89kg's and been having burping issues at 1.8bar on Rons with the same rims. Think Im going to have to give the Sag's a go next time. Link to comment Share on other sites More sharing options...
droo Posted June 12, 2015 Share But by measuring it, don't you change the outcome? I also need to get me on of those though! Yes, but by a measurable amount. It's not a subatomic particle. Or a cat. If you really want to get it right, connect - reading 1 - disconnect - connect - reading 2, then p = p1 + (p1-p2) and you'll be closer than you ever need to be. /geek hat off/ Link to comment Share on other sites More sharing options...
Greg29 Posted June 12, 2015 Share If you really want to get it right, connect - reading 1 - disconnect - connect - reading 2, then p = p1 + (p1-p2) and you'll be closer than you ever need to be. /geek hat off/ If p1 = 1.9 & p2 = 2.1 then your formula calculates p=1.7???? Link to comment Share on other sites More sharing options...
NukeproofPeanut Posted June 12, 2015 Share Yes, but by a measurable amount. It's not a subatomic particle. Or a cat. If you really want to get it right, connect - reading 1 - disconnect - connect - reading 2, then p = p1 + (p1-p2) and you'll be closer than you ever need to be. /geek hat off/ So whats the correct P to pump to, on said pump, without having to measure? i.e new base line? Link to comment Share on other sites More sharing options...
jimmycool Posted June 12, 2015 Share Do the gauges not have a deflator button? Surely the thing to do is to over inflate slightly then lower the pressure to the precise amount with the gauge. Link to comment Share on other sites More sharing options...
droo Posted June 12, 2015 Share If p1 = 1.9 & p2 = 2.1 then your formula calculates p=1.7???? If connecting the gauge forces air into the tyre, then yes. p1 - p2 gives you the pressure drop caused by the amount of air that escapes into the gauge, adding this to the first reading gives you the pressure before you connected... on a tyre this will be so small you probably won't even be able to measure it. Link to comment Share on other sites More sharing options...
Li Mu Bai Posted June 12, 2015 Share It could be the rim not combining with the bead of the tire properly to create a seal.What you could try is the stans or joes conversion with the valve attached to the rubber rim tape/strip. it usually lies well over both edges of the rim, and when the tire is inserted, you should see the small edge/sliver of the rubber rim tape sticking out between the rim and the tire bead. then with the correct shaking action (look for a Joes installation video) which allows sealent to cover the junction of the tire and rubber strip, a proper seal can be formed, which you literally have to peel apart should you want to remove the tire later.This should stop the burping, and let you ride at the pressure you want.A proper tubeless rim makes a much better connection with a tubeless specific tire bead. edit: ok just read the bit about a faulty pump. sigh* one thing though, a lot of peeps dont take the time to watch proper tubeless installation videos, and they just chuck he tire on and go riding. The oldJoe's and Stans installation videos on their websites have so many great tips and procedures to getting the tubeless installation right. the correct way does take time, and I suppose not everyone has the patience to learn how to set it up correctly. Link to comment Share on other sites More sharing options...
mazambaan Posted June 13, 2015 Share Glad you got the problem sorted. I'm surprised you battled to get the tyre off the rim. I recently fitted a Vittoria Saguaro and it was fingers only (and I am not Mr Steel Finger). I almost buy my tyres by weight; must be more than 700g for puncture resistance; but not too much. Link to comment Share on other sites More sharing options...
Enduro_Jakes Posted June 13, 2015 Share Not to derail the thread , but where did you get the digital gauge for R200? I am looking at buying one at the moment, and they are all in the vicinity of R400 to R450? I got mine almost 2 years ago on Take-A-Lot....it was on special No clue about current pricing, but well worth the money spent! Link to comment Share on other sites More sharing options...
Enduro_Jakes Posted June 13, 2015 Share Do the gauges not have a deflator button? Surely the thing to do is to over inflate slightly then lower the pressure to the precise amount with the gauge. It does have a deflate button, and to over pump and then drop to the desired pressure is the way I do it and it has always worked for me. Beats having to connect the pump repeatedly! Link to comment Share on other sites More sharing options...
PieterJvR Posted June 13, 2015 Share I got mine almost 2 years ago on Take-A-Lot....it was on special No clue about current pricing, but well worth the money spent!Awesome, thanks for the info! Will definitely be getting one very soon Link to comment Share on other sites More sharing options...
droo Posted June 15, 2015 Share So whats the correct P to pump to, on said pump, without having to measure? i.e new base line? Once you know what the pressure drop is, it's pretty constant. I've got to do this all the time on suspension, because the amount of air that escapes into the valve chuck when it's connected is around 10psi, which will make quite a difference... Link to comment Share on other sites More sharing options...
NukeproofPeanut Posted June 19, 2015 Share Once you know what the pressure drop is, it's pretty constant. I've got to do this all the time on suspension, because the amount of air that escapes into the valve chuck when it's connected is around 10psi, which will make quite a difference... Yip figured that out on my first ride as well! Though the shock was leaking air! Now I also pump it a few psi more and disconnect quickly. Link to comment Share on other sites More sharing options...
GreatGusto Posted June 21, 2015 Share +1 for Saguro's, been riding them for over a year and never stopped on a trail to repair. And I'm 83 kg when I eat pies, 78 when I don't. Link to comment Share on other sites More sharing options...
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