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130 psi clinchers... e.g., Felt Speed AW 700 x 25

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130 psi clinchers... e.g., Felt Speed AW 700 x 25

Old 08-30-15, 11:38 AM
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130 psi clinchers... e.g., Felt Speed AW 700 x 25

Has a quality floor pump become indispensable? If so, I can recommend Leyzne pumps.
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Old 08-30-15, 12:53 PM
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You're doing it wrong.
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Old 08-30-15, 01:35 PM
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Ditto. Most rims won't handle 130 PSI over time.
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Old 08-30-15, 01:39 PM
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Even if the rim can handle it, your 25 width tires should probably be at 90-95PSI.

Maybe 100-105 for a tandem.
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Old 08-30-15, 02:37 PM
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What is the point here, that your pump gets 130 psi? That you ride at 130 psi?

Any decent, no-name $20 floor pump from Nashbar or the like will get all the bike tire pressure you need with only tolerable effort, and it will last for decades with minimal or no maintenance.

I repeat, what's your point. Or as my highly respected colleague datlas, likes to say, "What's this thread about?"
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Old 08-30-15, 04:43 PM
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I'm a Silca guy. I've had it up to 160 on a couple of sewups. That was a pretty solid ride.
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Old 08-30-15, 05:50 PM
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My neck and wrists already hurt after I read the thread title.

Must be a Paris-Roubaix ride everytime you go out unless you ride on a NASCAR track.
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Old 08-30-15, 06:07 PM
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Originally Posted by datlas View Post
Even if the rim can handle it, your 25 width tires should probably be at 90-95PSI.

Maybe 100-105 for a tandem.
I usually run 25mm tires at 115 lbs. on our tandem. I'm running Conti 4000s II 28mm tires, which measure 32mm on my Kinlin 279 rims at 110 lbs. Works fine, honest. 282 lb. team.

Be that as it may, 130 is a bit high for 25mm. I used to run 140 lbs. in my 23mm Tricomps back when I rode a single on competitive rides. That worked well too. A good max pressure estimate is (tire width in mm) X (tire pressure) = 3000. Never met a rim that couldn't handle that.

BTW, 130 is the sidewall pressure on those Felt tires. However they're an inexpensive 320g tire and I doubt they'd be comfortable at that pressure. High pressure is more comfortable using tires with light sidewalls.
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Old 08-31-15, 01:55 PM
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I run my 25s at 84-86psi... don't pump your tires to the max. that's not what it's there for.
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Old 08-31-15, 01:56 PM
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Originally Posted by superdex View Post
I run my 25s at 84-86psi... don't pump your tires to the max. that's not what it's there for.
I wish they could make a sticky that said "Max pressure is NOT ideal pressure," you know?? I blame our car culture as typically auto tires you do pump them up to max.
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Old 08-31-15, 02:00 PM
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or maybe put that info on the inside of the sidewall, where mechanics would know to look (and that's it)
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Old 09-01-15, 09:38 AM
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Anyone know what the TPI of the Felt's casing is?

Vittoria makes tires with posted 130 psi max pressure recommendations. It's new to me to see clinchers with numbers like these on sidewalls so I was interested to do a little web-based research.

An ideal tire pressure, according to Vittorria, is a function of tire construction (e.g., Nylon 127 TPI), type of tire (clincher), the rider's weight (e.g., 209 or more) and the type of road surface (e.g., dry/smooth). Vittoria has an App that uses this information, which they say applies to all tires).

Based on the above factors, Vittoria's App determines the beginning point. In their view, finding the ideal pressure, however, depends on riding style and simply trying it out in the field.

My guesses based on the App and that the tires accommodate 130 psi is that Felt's clincher probably is Nylon construction in the range of 127-150 TPI (e.g., they could be more expensive higher TPI tires and according to the app the starting point would then be a little less than the starting point below unless a radial construction is employed to fabricate the tire).

Assuming they're not 220 TPI tires, Vittoria's App puts the starting point for me at: 125 psi (FRONT) and 130 psi (BACK). For lighter riders and rougher or wetter roads the starting point will be less.
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Old 09-01-15, 09:43 AM
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Originally Posted by McBTC View Post
Anyone know what the TPI of the Felt's casing is?

Vittoria makes tires with posted 130 psi max pressure recommendations. It's new to me to see clinchers with numbers like these on sidewalls so I was interested to do a little web-based research.

An ideal tire pressure, according to Vittorria, is a function of tire construction (e.g., Nylon 127 TPI), type of tire (clincher), the rider's weight (e.g., 209 or more) and the type of road surface (e.g., dry/smooth). Vittoria has an App that uses this information, which they say applies to all tires).

Based on the above factors, Vittoria's App determines the beginning point. In their view, finding the ideal pressure, however, depends on riding style and simply trying it out in the field.

My guesses based on the App and that the tires accommodate 130 psi is that Felt's clincher probably is Nylon construction in the range of 127-150 TPI (e.g., they could be more expensive higher TPI tires and according to the app the starting point would then be a little less than the starting point below unless a radial construction is employed to fabricate the tire).

Assuming they're not 220 TPI tires, Vittoria's App puts the starting point for me at: 125 psi (FRONT) and 130 psi (BACK). For lighter riders and rougher or wetter roads the starting point will be less.
The bold part is the universe's way of telling you to use a larger tire size, or otherwise make sure you have good dental coverage.

It might also be the app's way of telling the people at Vittoria who wrote it, to check their math....depending on your weight.
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Old 09-01-15, 09:46 AM
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Originally Posted by McBTC View Post
the rider's weight (e.g., 209 or more) ... the starting point for me at: 125 psi (FRONT) and 130 psi (BACK)
When I was 225 I ran my (23mm at the time) tires 115-120, and they were unforgiving rocks. The lesson here is go ride them with varying pressures.

And if you'd rather look into other belly buttons: Bicycle tire pressure calculator (though I think there's something seriously wrong with the first calculator's math; it tells me 183psi?)
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Old 09-01-15, 10:44 AM
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I run 25's at 77 and 85. Don't understand why guys over 200lbs run 23's anyway.
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Old 09-01-15, 10:45 AM
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Originally Posted by superdex View Post
(though I think there's something seriously wrong with the first calculator's math; it tells me 183psi?)
The assumption is that you're weighing at each tire. The weight you input should be the weight under only 1 tire, not your weight total.
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Old 09-01-15, 02:14 PM
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130psi in 25mm tires? Why even bother with air, just use solid rubber tires, the ride quality can't be much different.
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Old 09-01-15, 04:23 PM
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I still don't understand the question or even if there was a question.
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Old 09-01-15, 04:45 PM
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Originally Posted by shelbyfv View Post
I still don't understand the question or even if there was a question.
When was the first time you saw 130 psi on a clincher?
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Old 09-01-15, 04:47 PM
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parsed:
1. lezyne pumps are great.
2. OP uses a lezyne pump to put too much air into his tires

your welcome
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Old 09-01-15, 08:24 PM
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Originally Posted by McBTC View Post
Anyone know what the TPI of the Felt's casing is?
Does anybody ride on Felt tires beyond 3 months after they've bought a Felt bike?
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Old 09-01-15, 09:55 PM
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Originally Posted by therhodeo View Post
The assumption is that you're weighing at each tire. The weight you input should be the weight under only 1 tire, not your weight total.
duh.
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Old 12-14-20, 08:48 AM
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Not a question just a comment

Just tried my Felt 25 x 700 tires and rims on a ride. Bikes of this type mine is 58 cm are rated for 275 lb at most and I am 385 lb. You would think that would make the ride worse since the tires are all the way to 130 psi. Ride is phenomenal, More active than a passive mountain bike ride which keeps my head in the game so far. ( just getting reacquainted ) lets see how long until a blowout. still lacking some confidence obviously. Statement complete.
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Old 12-14-20, 09:38 AM
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Originally Posted by datlas View Post
I wish they could make a sticky that said "Max pressure is NOT ideal pressure," you know?? I blame our car culture as typically auto tires you do pump them up to max.
Don't know where you get that idea - every modern car I've ever owned lists the recommended car-specific tire pressure on a sticker on the B column - completely unrelated to whatever max pressure is on the tire itself
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Old 12-14-20, 10:45 AM
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Reminds me of the late 80s with 18-20mm tires and even then we are only talking about 110-120 psi while applying the notion of mimicking tubulars taken to extremes. I switch to 28s in 1989 (while still participating in collegiate racing) and keep them around 70-80 psi depending on how lazy I feel. Been run 25s recently because 28s was getting expensive all of sudden but still keeping them about the same pressure.

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