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Tire pressure lower limit on Tire

Old 04-07-17, 07:16 AM
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Tire pressure lower limit on Tire

I run a Connondale Synapse with Schwalbe One 28c tires. I weigh 165lbs and the Bike is 18lbs. I ride on average road surfaces. I think the ideal pressure for comfort at the rear is around 75-80 PSI and 70 PSI or so in the front. The lowest PSI on the tires say 85 PSI. Is it Safe to run them at the lower pressure or should I go with 90 PSI at the rear and 85 PSI front to stay within the lower limit with a little less comfort? i am interested to see what other rider do in this situation.
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Old 04-07-17, 07:22 AM
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Fine to run them as you describe.
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Old 04-07-17, 07:22 AM
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Originally Posted by jtburn
I run a Connondale Synapse with Schwalbe One 28c tires. I weigh 165lbs and the Bike is 18lbs. I ride on average road surfaces. I think the ideal pressure for comfort at the rear is around 75-80 PSI and 70 PSI or so in the front. The lowest PSI on the tires say 85 PSI. Is it Safe to run them at the lower pressure or should I go with 90 PSI at the rear and 85 PSI front to stay within the lower limit with a little less comfort? i am interested to see what other rider do in this situation.
You increase the risk of a pinch flat and tire not clinching to rim going that low with stated rating. I'm sure others will disagree.
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Old 04-07-17, 07:36 AM
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I do this all the time never had any flats due to this. I try to go as low as I can without pinch flatting or feeling mushy, comfort first.
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Old 04-07-17, 07:58 AM
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You get best results with pressures within the range on the tire's sidewall. That said, I don't worry about pinch flats unless the pressure is somewhat lower than that, and I'd run your 28's at 70-85 if I wanted to. YMMV
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Old 04-07-17, 08:16 AM
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Sounds a bit low to me. However, if you are careful with potholes, railroad tracks, etc. you shouldn't have any problems.
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Old 04-07-17, 08:46 AM
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Thanks for your help everyone.
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Old 04-07-17, 08:57 AM
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Perhaps this will help:
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Old 04-07-17, 09:01 AM
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Originally Posted by jtburn
I run a Connondale Synapse with Schwalbe One 28c tires. I weigh 165lbs and the Bike is 18lbs. I ride on average road surfaces. I think the ideal pressure for comfort at the rear is around 75-80 PSI and 70 PSI or so in the front. The lowest PSI on the tires say 85 PSI. Is it Safe to run them at the lower pressure or should I go with 90 PSI at the rear and 85 PSI front to stay within the lower limit with a little less comfort? i am interested to see what other rider do in this situation.
You should be okay with the pressures that you said are comfortable. The "lower pressure" limit depends on rider weight and at your stated weight, the "lowest psi" on the sidewall is probably overly high. I googled and found the following article which is relevant to your question: Technical FAQ: Minimum tire pressure and more | VeloNews.com

Happy and comfy riding
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Old 04-07-17, 10:15 AM
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What Reynolds said. Think of the times you've flatted and gotten home on an underinflated tire.
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Old 04-07-17, 10:19 AM
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Originally Posted by jtburn
I run a Connondale Synapse with Schwalbe One 28c tires. I weigh 165lbs and the Bike is 18lbs. I ride on average road surfaces. I think the ideal pressure for comfort at the rear is around 75-80 PSI and 70 PSI or so in the front. The lowest PSI on the tires say 85 PSI. Is it Safe to run them at the lower pressure or should I go with 90 PSI at the rear and 85 PSI front to stay within the lower limit with a little less comfort? i am interested to see what other rider do in this situation.
You should be fine.

I've ridden thousands of miles on tires that were "under-inflated" without issue.
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Old 04-07-17, 10:45 AM
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Originally Posted by jtburn
I run a Connondale Synapse with Schwalbe One 28c tires. I weigh 165lbs and the Bike is 18lbs. I ride on average road surfaces. I think the ideal pressure for comfort at the rear is around 75-80 PSI and 70 PSI or so in the front. The lowest PSI on the tires say 85 PSI. Is it Safe to run them at the lower pressure or should I go with 90 PSI at the rear and 85 PSI front to stay within the lower limit with a little less comfort? i am interested to see what other rider do in this situation.
I have a set of 28mm tires I run at 85-90 psi....I'm 195lb. I wouldn't imagine you would have the slightest issue going even a bit lower than what you're proposing.
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Old 04-07-17, 10:46 AM
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It depends on the width of your contact patch
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Old 04-07-17, 12:51 PM
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Originally Posted by jtburn
I run a Connondale Synapse with Schwalbe One 28c tires. I weigh 165lbs and the Bike is 18lbs. I ride on average road surfaces. I think the ideal pressure for comfort at the rear is around 75-80 PSI and 70 PSI or so in the front. The lowest PSI on the tires say 85 PSI. Is it Safe to run them at the lower pressure or should I go with 90 PSI at the rear and 85 PSI front to stay within the lower limit with a little less comfort? i am interested to see what other rider do in this situation.
Is this a Schwalbe thing..? 85psi MIN for 28mm tires seems awfully high. My 25mm Mich Pro Endurance list 73 psi as a minimum for example.
Visiting Schwalbe's site, it is odd but they list the same MIN pressure for all of the One model tires whether it's 700x23, 25, or 28. They only change the max. That's not usually the case with most manufacturers.

https://www.schwalbe.com/en/road-rea...walbe-one.html
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Old 04-07-17, 12:56 PM
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To the OP, is that a tubeless tire? If so, I thought one of the main benefits of tubeless was that your could ride them at lower pressures, no?
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Old 04-07-17, 01:37 PM
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Originally Posted by Sy Reene
Is this a Schwalbe thing..? 85psi MIN for 28mm tires seems awfully high. My 25mm Mich Pro Endurance list 73 psi as a minimum for example.
Visiting Schwalbe's site, it is odd but they list the same MIN pressure for all of the One model tires whether it's 700x23, 25, or 28. They only change the max. That's not usually the case with most manufacturers.

https://www.schwalbe.com/en/road-rea...walbe-one.html
When manufacturers list a minimum pressure, it's almost always higher than what makes sense.

The most ridiculous I have is Vittoria's Open Pave. 27mm tire and the sidewall lists a 100PSI minimum.
I don't think I'm ever going to run them that high.
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Old 04-07-17, 02:03 PM
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Originally Posted by Sy Reene
Is this a Schwalbe thing..? 85psi MIN for 28mm tires seems awfully high. My 25mm Mich Pro Endurance list 73 psi as a minimum for example.
Visiting Schwalbe's site, it is odd but they list the same MIN pressure for all of the One model tires whether it's 700x23, 25, or 28. They only change the max. That's not usually the case with most manufacturers.

https://www.schwalbe.com/en/road-rea...walbe-one.html
The numbers on the side of tires are meaningless. It's meant as a warning from the company lawyers to avoid lawsuits in the event a tire explodes or turns into nerve gas or something on a ride.
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