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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 03-03-09, 10:20 AM   #1
Yaktizzle417
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Shredded a tire in ~25mi/3 days..?

My ratio is 46/16..

I'm an ambidextrous skidder on over the bars skids... But hop skids I can only do one side.

I just ripped completely through a Seca Comp 700x23 145psi rear tire. Any ideas? It was properly inflated and I wasn't skidding on rough pavement.
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Old 03-03-09, 10:28 AM   #2
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If you're running a clincher at 145 PSI on the street, it's not properly inflated and that might have something to do with it.
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Old 03-03-09, 11:00 AM   #3
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Explain?

I'm new to this whole tire business..
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Old 03-03-09, 11:07 AM   #4
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Quote:
Originally Posted by Yaktizzle417 View Post
Explain?

I'm new to this whole tire business..
Generally speaking, there's no reason to inflate a clincher to 145 PSI on the road. You're more liable to get a puncture, you'll bounce off obstacles and therefore have less traction, and you're liable to blow the tire off the rim.

Work out a rough estimate of your ideal inflation pressure from this chart



Start from there and play around a bit to see what you like best. I weigh about 175 and run 100 in the front and 110 in the rear on 23s which I have had good luck with.
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Old 03-03-09, 01:22 PM   #5
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Quote:
Originally Posted by Yaktizzle417 View Post
My ratio is 46/16..

I'm an ambidextrous skidder on over the bars skids... But hop skids I can only do one side.

I just ripped completely through a Seca Comp 700x23 145psi rear tire. Any ideas? It was properly inflated and I wasn't skidding on rough pavement.
Lay off the skids and you'll find your tires will last a whole lot longer...
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Old 03-03-09, 02:22 PM   #6
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....i didnt know tires could inflate up to 145 psi...
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Old 03-03-09, 04:54 PM   #7
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There are track tubulars that can be pumped to 220 psi.
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Old 03-03-09, 04:58 PM   #8
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The highest I've ever gone on a 23c is maybe 110psi.

The Seca Comp is a pretty lightweight, thin tire. Thin tires shred more easily and don't last as long as a thicker tire.
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Old 03-03-09, 05:07 PM   #9
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Skidding will rip the crap out of a tyre given the chance, I run my pressures at around 100-110 and I'm ~175lbs, nothing spectacular. I ripped through my first back tyre in around 500 miles, which I thought was fast (great tyre just not great for skidding - I still have the matching front tyre running... 6550 miles and still going strong.)

25 miles is.... real quick - were you skidding the hell out of it down hills all day?
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Old 03-03-09, 06:07 PM   #10
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Wow, that chart makes me feel like a fat ****.
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Old 03-03-09, 06:17 PM   #11
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Lay off the skids and you'll find your tires will last a whole lot longer...
the young kids these days just don't understand.
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Old 03-03-09, 06:25 PM   #12
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Thanks for the chart. Where were you $31 ago =[

/moron
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Old 03-03-09, 06:37 PM   #13
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Quote:
Originally Posted by soul05 View Post
....i didnt know tires could inflate up to 145 psi...
A lot of ignorance and misinformation on this thread about tires.

This is the tire he's using, recommended PSI is 145
http://ddbicyclesandfitness.com/item...fm?LibId=41417

A list of tires with 145-150 PSI ratings
http://www.coloradocyclist.com/product/display/25110/10

So YES you can inflate a clincher to 145 PSI if the manufacturer says to do so. Chances are you ran through the tire that fast doing skids because a tire running that high psi offers lower resistance and is usually considered a "Race" tire, lightweight which means less rubber to burn through since you're more likely to change your race tires more often than your training tires.
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Old 03-03-09, 06:57 PM   #14
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Originally Posted by Thetank View Post
A lot of ignorance and misinformation on this thread about tires.

This is the tire he's using, recommended PSI is 145
http://ddbicyclesandfitness.com/item...fm?LibId=41417

A list of tires with 145-150 PSI ratings
http://www.coloradocyclist.com/product/display/25110/10

So YES you can inflate a clincher to 145 PSI if the manufacturer says to do so. Chances are you ran through the tire that fast doing skids because a tire running that high psi offers lower resistance and is usually considered a "Race" tire, lightweight which means less rubber to burn through since you're more likely to change your race tires more often than your training tires.
A tires maximum rating is not it's recommended pressure. Running a 23c at 145 PSI will provide the same terrible ride characteristics (namely, 145PSI of pressure underneath you) on the street regardless of what the sidewall says.

The track (surface known not to have irregularities or stones or debris) is a different story, but he's not riding on the track.
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Old 03-03-09, 07:01 PM   #15
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Skidding less will make you a better rider.
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Old 03-03-09, 09:20 PM   #16
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I was self teaching myself hop skids and competed in a skid contest..

Forgot to mention that bit. Mostly all on semi-rough blacktop.
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Old 03-04-09, 07:49 AM   #17
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Quote:
Originally Posted by elTwitcho View Post
A tires maximum rating is not it's recommended pressure. Running a 23c at 145 PSI will provide the same terrible ride characteristics (namely, 145PSI of pressure underneath you) on the street regardless of what the sidewall says.

The track (surface known not to have irregularities or stones or debris) is a different story, but he's not riding on the track.
Look at the very chart you posted, assume the rider weighs 180+ lbs. What then?
There's a reason they stamp the PSI rating on a tire, its not a suggestion its what the manufacturer wants you to use to prevent damage to the tire itself and to prevent pinch flats. Just because most road tires, clinchers I would say, have a 110-120 max psi doesn't mean that a 150 PSI max tire needs to run at 110-120 just because others do.
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Old 03-04-09, 08:35 AM   #18
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That 150psi is just an indication of the strength of the tire, not what pressure you should be running it. It's also a bit of marketing one-upmanship. At pressures higher than 110-120 on the road, the tire actually loses traction. You need the tire to deflect somewhat so that it gets some contact with the road. If the road is chipseal or some other rough surface, you should drop the pressure a bit more.

The faster you ride, and the more descents you have(especially curvy ones), the more you need to pay attention to this. The quality of the tire is more important in these cases, too.

You don't want your pressure to be too low; that causes a lot of pinch flats, too. More flats are caused by under-inflation than over.
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Old 03-04-09, 08:45 AM   #19
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Maybe consider a gearing with more skid patches? You have 8 now, 16 if you are ambidextrous skidding all the time. Go to 17T in the back and you will have 34 patches when you are skidding ambidextrously. It will help the tire to wear a little more evenly and last longer.

If you are going to be tearing through tires like this you should also make friends with the LBS and ask for their old tires that they switch out for new ones for customers. Usually they will give them away or sell them to you real cheap.
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Old 03-04-09, 08:50 AM   #20
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Yeah thats what I've been doing. Except things are hella slow right now due to the weather. When spring picks up, I'll be dialed.

17t is a possibility when I get paid next. I've been thinking about going to a little lower gear due to the insane wind.
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Old 03-04-09, 08:55 AM   #21
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Even if your tire can accept 150 psi. Why the heck would you want to?
Worse handling, worse traction, shorter tire life, loosened molar fillings...

Maybe if you've got a glass surfaced velodrome in your back yard.

I suppose Thetank runs 65 psi in his mountain bike tires too.
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Old 03-04-09, 09:04 AM   #22
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front brake? My tires last years... $7 brake pads < $31 tire.
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Old 03-04-09, 09:14 AM   #23
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Yeah thats what I've been doing. Except things are hella slow right now due to the weather. When spring picks up, I'll be dialed.

17t is a possibility when I get paid next. I've been thinking about going to a little lower gear due to the insane wind.
A new cog is cheaper than a new tire.
Just sayin'.

That does totally suck. A few weeks ago I hit a nail with a days-old tire. Guess I shouldn't explore construction sites at night, huh.
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Old 03-04-09, 09:27 AM   #24
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Wow, that chart makes me feel like a fat ****.
don't worry, I'm above the scale with you
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Old 03-04-09, 04:26 PM   #25
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Even if your tire can accept 150 psi. Why the heck would you want to?
Worse handling, worse traction, shorter tire life, loosened molar fillings...

Maybe if you've got a glass surfaced velodrome in your back yard.

I suppose Thetank runs 65 psi in his mountain bike tires too.

HA! I don't own a Mt. Bike!

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