sean.hwy

I could not find anything for a skinny road tire 25mm at high psi 80 for daily air loss. What is normal ?


The closest I could find when searching was
https://bikecommuterhero.com/tire-pressure-loss/
My friend wanted me to install Orange sealant that I use on my bikes to see if it makes a difference. I use 32mm gravel king tires at lower psi so I don't really notice that much of drop from day to day.

My friends bike, 80 psi on 25 mm P zero race TLR with stans sealant lost 6 to 9 psi in 24 hours. I used a digital tire gauge not hooked up to a pump. I know just hooking up a bike pump you lose 5 psi just filling up the bike pump hose.

Barry2 

This might help

Barry

cxwrench

There is no 'normal'.

livedarklions

I love that the "normal" range is "1-40 psi".

sean.hwy

yeah that is over a week. kind of crazy.

I was hoping I could get some real world experience from this forum. Thee must be some road bike people here with tubeless 25 mm 80 ish psi that ride their bikes every day or every other day, right ???

surak

My first generation 25mm Schwalbe Pro One tubeless essentially lose nothing over a few days with Orange Seal Endurance on DT Swiss rims. I had to train myself to not automatically add air to them between every ride as I would let more out from pressing the valve down than they'd lose on their own.
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I've set up tubeless with the same Orange Seal sealant on 2 other wheelsets: 35mm Pirelli Cinturato Velos on DT Swiss rims that also don't lose any air, and 32mm GP5k TL on Hunt alloy rims that lose a ton of air (10+ PSI overnight) without leaking any sealant.

masi61

+1 to this.

I would think that with all the variables of 1) quality of tape job 2) how tight the bead to rim interface is, 3) how good of a seal your valve makes, & 4) random additional unique factors that can malfunction - - - &5 type and quantity of sealant used - - - - all these factors can make for a leaker of an installation on one wheel or you might nail it perfectly and have great air holding on another wheel.

I find that my tubeless skills are one of those skills that you have to do the work hands on and deal with the fallout of any part of the process that you have not competently implemented and re-do the parts that fail until you get it right. When you finally get it right, road tubeless to me can be a beautiful thing. But this season I had to start from scratch after having my rear wheel rebuilt with new heavier duty spokes then my re-worked wheel that previously sealed great is now being problematic with the old DT Swiss road valve now wanting to intermittently leak when paired with 2 fresh layers of 21 mm DT swiss road tubeless tape.

WhyFi

To reiterate: there is no "normal." I don't run 25s anymore (tell your friend that 28 is the new 25 ), but I do try different tires all the time. I'll top of every day with some tires while others lose so little that I'll top off once a week.

bbbean 

There's a reason you need to check your tire pressure before every ride. I have a couple of tubeless road wheelsets, and they cover a range. The best fitting set only loses a few psi overnight, and 10-20 lbs if they sit for a week. I ride pressures between 70 and 80 psi (24-26mm).

But what others told you is right - there really is no "normal". At the very least give your tires the thumb test before every ride.

DaveSSS 

I'd say it doesn't matter. I use a properly made presta chuck that doesn't push on the plunger and reset the pressure for every ride, since I usually ride M-W-F. It's not that much trouble. I usually only see a few psi loss.

cxwrench

Let me repeat. There. Is. NO. Normal. Is that clear enough?

Rolla

Let's make this easy: is your friend losing roughly the same psi per day on both tires?

If yes, then that's the normal loss for his/her set-up.
If one tire is losing more than the other, then he/she should inspect the tape, seating, and valves of that tire.
The brand of sealant is an unlikely factor. The amount of sealant, however, might be.

mihlbach

In my experience with tubeless tires, after a tire is installed, air loss slows with time. As the tire is ridden, the sealant gradually gunks up all the micro leaks. In contrast, inner tubes always loose air at a constant rate, as there is no sealant to make the tube or tire gradually less porous. I have been running a set of 25mm Contintental GP5000 TLs since early February. At first I was loosing maybe 20 PSI every 24 hours but that quickly slowed to about 5 PSI per day.

GhostRider62

I was losing quite a bit (10-15 psi IIRC) overnight on GP5000 TR S 25mm until I changed to a different sealant. It is only 6-7 psi now. Basically, I have to air them up every day. Same with Compass/Herse tires. Schwalbe Pro One were much better, maybe a couple 2 or 3 PSI per night. Special S Works did not leak but they were so awfullly slow and uncomfortable, I ripped them off the bike.

sean.hwy

Actually if you listen to all the feed back. Normal seems to be zero to about 5 psi with some out outliers up to about 10 psi over night. I am not hearing anyone say 40 psi or flat tire is normal.



So it looks like my friends wheel/tire combo is within spec. I will try the orange sealant just because I have it to see if it helps at all.

Thanks for letting me know what your tire combo psi loss was over night.

PeteHski

There is "typical" though. Most of my tubeless setups lose around 5 psi over 24 hours. Some a bit less, some a bit more. Lots of factors at play that account for the variation. For this reason I always check my tyre pressure before a ride and top up as required. If you don't want the hassle of checking tyre pressures daily then better to use a tubed tyre. I've never had a tubeless setup that doesn't lose significant pressure over a few days.

The higher the running pressure and skinnier the tyre (less air volume) the more likely you are to lose pressure more rapidly.

alcjphil

My tubeless setup with 700 x 28 tubeless Hutchinson Fusion5: Front tire loses less air pressure than the rear. Nothing to do with the tape job since my wheels are Campagnolo Shamal 2way fit which do not require tape. Over the 10+ years I have been riding these wheels I have seen the same thing several times, sometimes the front loses air faster, sometimes the rear. there is no normal

ThermionicScott 

I'd argue that both tires could lose air at an equal but excessive rate.

Rolla

I doubt that's likely, but argue away. It's what we do here.

livedarklions

Once it was established that the range of "normal" is anything from X to 40X, all there really could be is mindless quibbling.

GhostRider62

Established? One post said 40x. You. All the other pressure losses are much, much narrower in range. There is a range about the Normal and it isn't remotely as you characterize.

ThermionicScott 

Maybe my use of the word "equal" was an unforced error. Let's say one tire goes flat overnight, and the other is not flat but still far too soft to use by the next day, so it needs to be pumped up as well. Neither would be acceptable in my book.

Rolla

Again, we were just trying to figure out if the OP's air pressure loss was typical, and I suggested that comparing one tire to the other might help. I'm sure you could invent any number of scenarios that would disqualify that method if that's how you want to spend your time.

ThermionicScott 

This is BikeForums. If a thread doesn't start off in the weeds, it will get there sooner or later.

livedarklions

As usual, wrongo, buddy. The 40x is from the OP, I was quoting it. Thanks for playing but you should show yourself out.

In case you haven't figured it out, 40 x 1 psi. is 40 psi.