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Snakebite! What tire offers more pinch flat protection?

Old 07-07-08, 08:17 AM
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Snakebite! What tire offers more pinch flat protection?

I should of been more careful, but I pinch-flatted both tires this morning! I'm a 240 lbs commuter with 700 x 28 Gatorskins on a Mavic a319 rim. The 700 x 28 tire on a 19mm rim might be part of the problem;

The rim is ETRTO compatible size: 622 x 19c
Recommended tire widths: 28 to 47 mm

I'm considering moving the Gatorskins to my vintage road bike and getting a larger tire for my commuter bike.

It comes down to a Schwalbe Marathon Plus 700c x 32 with a 95 psi max, or a
Kenda Kwest 700c x 35 with an 85 psi max.

Cost is not a priority, but flat protection is! Which is better?

Michael
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Old 07-07-08, 08:26 AM
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I've never really thought of tires as offering pinch flat protection. Adding more air to any tire will reduce pinch flats. At 240, you should probably learn to ignore max psi ratings.
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Old 07-07-08, 08:33 AM
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don't do the kendas.

some tires have pinch flat protection built in, i don't know if the schwalbes do, let me research.... perhaps the vittoria randonneurs.

btw, when was the last time you inflated your tires prior to this double pinch flat? a double pinch flat indicates, to me anyway, a lack of sufficient tire pressure...


Bontrager Hardcase tires.....

http://bontrager.com/technology/hardcase/en

anti pinch flat tech is ribbing just above the bead....

Last edited by Bekologist; 07-07-08 at 08:40 AM.
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Old 07-07-08, 08:49 AM
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I'm 180 lbs and ride with 20 lbs of crap in addition. OEM 700c x 35mm tires are rated for 60-80 psi.

I never ride with the tires under 80 psi and have to check and pump them every morning before I head out. I often inflate to 85, and don't go higher simply because I'm a weakling.

This is what I'd recommend too, before buying new tires.
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Old 07-07-08, 08:53 AM
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[QUOTE=Bekologist;7013430]

btw, when was the last time you inflated your tires prior to this double pinch flat?
[QUOTE]

I pumped them up to 100 psi last week. The felt firm to the squeeze this morning, but might have been down to 80 psi.

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Old 07-07-08, 09:49 AM
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I pumped them up to 100 psi last week. The felt firm to the squeeze this morning, but might have been down to 80 psi.

Michael
You don't need different tires, you need to inflate your current ones way higher! I weigh 210 and I pump my 700x28 tires to 120 in the back and 110 in the front.
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Old 07-07-08, 09:52 AM
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Put some real tires under it,or put more air in those.I run 140lbs in the same size tires on my touring bike,no pinch flats.
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Old 07-07-08, 10:16 AM
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Originally Posted by Throwmeabone View Post
You don't need different tires, you need to inflate your current ones way higher! I weigh 210 and I pump my 700x28 tires to 120 in the back and 110 in the front.
That's about what I run at about the same weight. I never got more than two days without putting air in tires 28c or smaller. I sometimes get lazy and run my 35c's longer.
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Old 07-07-08, 10:50 AM
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Originally Posted by Bekologist View Post
Bontrager Hardcase tires.....

http://bontrager.com/technology/hardcase/en

anti pinch flat tech is ribbing just above the bead....
Huh. I didn't know this, but I can confirm that it works.

At over 30MPH I hit a pothole hard enough to flat-spot both wheels, and with enough shock to move the brifters. Both tires held air perfectly. They and the tubes are completely undamaged. Race Lite Hardcase 700x28. Ride nice and handle well too.
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Old 07-07-08, 11:29 AM
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fat tires that don't require close monitoring of air pressure.
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Old 07-07-08, 11:34 AM
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I run 28mm Conti UG's on 19mm wide rims also.
I also weigh 240 pounds. Never had a pinch flat, even on the rough roads and potholes I've encountered.

Run my front at 110psi
Run my rear at 120psi (4psi over max recommended)

Check your tire pressure every couple days. A high pressure tire (over 100psi) can lose up to 15 psi in 24 hours. That 100psi you put in last week (which was a bit on the low side for starters) may have been down to 75psi or less this morning. I top off my tires every other morning before I leave; my front usually is 5-10psi low, and the rear is typically 10-15psi low.
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Old 07-07-08, 11:52 AM
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Originally Posted by CliftonGK1 View Post
I run 28mm Conti UG's on 19mm wide rims also.
I also weigh 240 pounds. Never had a pinch flat, even on the rough roads and potholes I've encountered.

Run my front at 110psi
Run my rear at 120psi (4psi over max recommended)

Check your tire pressure every couple days. A high pressure tire (over 100psi) can lose up to 15 psi in 24 hours. That 100psi you put in last week (which was a bit on the low side for starters) may have been down to 75psi or less this morning. I top off my tires every other morning before I leave; my front usually is 5-10psi low, and the rear is typically 10-15psi low.
Thanks, I was concerned that the 28 size was marginal on a 19mm rim, it is the smallest size recommended.

I hit a broken edge of cracked concrete as I pulled into a gas station, it was like hitting an arrowhead. I'm normally alert to these things .

I'll go with the 110 & 120 psi recommondations and keep my existing tires.

Michael
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Old 07-07-08, 12:21 PM
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Jeez, guys! They're tires not rocks! 120 psi? 140? Holy cow! I run 35mm tires on one bike and 37mm tires on the other, both pumped to 90 psi and have never pinch flatted either. I run 55 psi front and 45psi rear on mountain bikes and pinch flat so seldom that it's not an issue.

It's about riding lighter in the saddle more than it's about the weight the tires take. Don't slam stuff and don't sit your butt on the saddle. Learn to float over things. Maybe watch where you are going too.
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Old 07-07-08, 12:34 PM
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Originally Posted by cyccommute View Post
Jeez, guys! They're tires not rocks! 120 psi? 140? Holy cow! I run 35mm tires on one bike and 37mm tires on the other, both pumped to 90 psi and have never pinch flatted either. I run 55 psi front and 45psi rear on mountain bikes and pinch flat so seldom that it's not an issue.

It's about riding lighter in the saddle more than it's about the weight the tires take. Don't slam stuff and don't sit your butt on the saddle. Learn to float over things. Maybe watch where you are going too.

Huge difference between a 23-28 and a 35-37.

90 on a 35/37 and 45/55 on mtb tires is very high as well.
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Old 07-07-08, 12:42 PM
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I'm almost half the OP's weight and I used to pinch flat a lot on my road bike's 25mm tires when I didn't conscientiously keep them at or near the recommended 125 psi. All tires lose a certain amount of air, but the high pressure of most road bike tires combined with the overall low volume of the tires means that they tend to lose more pressure than, say, hybrid tires.
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Old 07-07-08, 12:49 PM
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Originally Posted by cyccommute View Post
Jeez, guys! They're tires not rocks! 120 psi? 140? Holy cow! I run 35mm tires on one bike and 37mm tires on the other, both pumped to 90 psi and have never pinch flatted either. I run 55 psi front and 45psi rear on mountain bikes and pinch flat so seldom that it's not an issue.

It's about riding lighter in the saddle more than it's about the weight the tires take. Don't slam stuff and don't sit your butt on the saddle. Learn to float over things. Maybe watch where you are going too.
I ride lightly already. Float the bike over bumps and RR tracks, avoid curbs and potholes, etc. 105psi on a 28mm UltraGatorskin is right around the the low end of where I feel comfortable on them. I run my tires harder because I don't want like to feel them 'roll' in the corners, and at 110f/120r I feel I get the best ride for both comfort and performance. With 116psi being the top rating for the tire, 110 isn't that crazy a pressure to run and 120 is barely above the rated pressure.
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Old 07-07-08, 12:50 PM
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Pinch flats? Only after a few beers.
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Old 07-07-08, 12:51 PM
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Originally Posted by JeffS View Post
Huge difference between a 23-28 and a 35-37.

90 on a 35/37 and 45/55 on mtb tires is very high as well.
Not that much. I've run 28s and even 19s in the past. I've never put 120 psi in any tire. 140psi is overkill in spades.

90 psi, by the way is the recommended pressure on the 35 mm and 37mm.
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Old 07-07-08, 01:10 PM
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Originally Posted by cyccommute View Post
Not that much.
28mm vs 35mm width is 7mm difference. That's a 25% increase in the diameter of the tire. I'd say that's a significant increase.

I will agree that 140psi is overkill for most applications. (Not on a good pair of skinny sew-ups at the velodrome, though.)
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Old 07-07-08, 01:57 PM
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Originally Posted by MrPhil View Post
Pinch flats? Only after a few beers.
Even then it's just the road to dissapointment.
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Old 07-07-08, 04:41 PM
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Originally Posted by CliftonGK1 View Post
28mm vs 35mm width is 7mm difference. That's a 25% increase in the diameter of the tire. I'd say that's a significant increase.

I will agree that 140psi is overkill for most applications. (Not on a good pair of skinny sew-ups at the velodrome, though.)
I make it 20%

Continental recommends 95 psi with a max of 116psi on the 28mm. I wouldn't consider a 28 to be that narrow of a tire by the way. Back in the day, those were considered slightly narrow touring tires. I think I have something similar on a disused tandem.
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Old 07-07-08, 06:28 PM
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Overkill,It says inflate to 120 on the tire.In the good old days,when you could buy good 27" tires,I used to ride/tour on 27x7/8 tires pumped up to 160.You could tap the tire with your finger and it would ring like a bell.

Been running 700x32 the last couple years,still pump them to 120(140 loaded),even though it says 95.They feel too squishy with 95 pounds in them.

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Old 07-07-08, 08:46 PM
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most vittoria clincher 23s are rated up to close to 150psi.....they roll like something sweet at that psi. nothing to do with the pinch flat talk.
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Old 07-08-08, 11:44 AM
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Well, I regressed and purchased a set of Specialized INFINITY ARMADILLO 700C x 38 ( http://www.specialized.com/bc/SBCEqP...jsp?spid=35691 ), these are good for 100 psi. If I was 50 lbs lighter I would stick to the 700c x 28's, but I can't accept any significant risk of pinch flat.

The roads can be rough in Chicago and you don’t always have the option of avoiding every defect in the pavement. Last year I destroyed two tires & alloy rims on my car! 100 yards later four cars were sidelined multiple flats.

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Last edited by Barrettscv; 07-08-08 at 12:59 PM.
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