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-   -   Guess What Pressure I Was Running My Tires At (https://www.bikeforums.net/mountain-biking/380355-guess-what-pressure-i-running-my-tires.html)

ProFail 01-18-08 05:01 PM

Guess What Pressure I Was Running My Tires At
 
Approximately 15 PSI. Pretty win considering I only pinch flatted two times in the month I was running it at. I wouldn't have run them that low if I had known, I assumed they were at 30. I put them back to 40 and they feel hard as hell and the ride is unforgiving. =(

Cheeto 01-18-08 05:26 PM

I run 65 psi.

ProFail 01-18-08 05:28 PM


Originally Posted by Cheeto (Post 6008184)
I run 65 psi.

Pfsh

Cheeto 01-18-08 06:23 PM

keeps my wheels true lol.

only doing that ebcause the Shop told me to lol

z415 01-18-08 07:54 PM


Originally Posted by Cheeto (Post 6008487)
keeps my wheels true lol.

only doing that ebcause the Shop told me to lol

Did the shop tell you why that keeps your wheels true? Because I'd want to know. I run my around 40-45 depending.

pyroguy_3 01-18-08 07:56 PM


Originally Posted by Cheeto (Post 6008487)
keeps my wheels true lol.

only doing that because the Shop told me to

I'm guessing they're not tubeless? I've never run tubeless, but you can apparently run some fairly low pressures in them. You don't necessarily have to run 65 because your shop says so. I put about 40 in mine and I still have good traction and a decent enough rolling speed. It just takes a little effort to dial the pressure in that you like. Since you said 65 was a little unforgiving, dial it down a bit and see how it feels.

How does it keep your wheels true? Running 65 or 15?

Cheeto 01-18-08 08:06 PM

they said it keeps the tire off the rim when you hit hard.
he said what makes a lot of rims bent is when you dont run the max pressure is 1, pinch flats, and two, your rim comes in contact with the ground as the tire squishes in.

when i used to BMX i could always tell when my tires where to lower, because when i landed a jump i could here the loud hard ringing of my rim smacking off the ground.

ProFail 01-18-08 08:22 PM


Originally Posted by pyroguy_3 (Post 6008944)
Since you said 65 was a little unforgiving, dial it down a bit and see how it feels.

How does it keep your wheels true? Running 65 or 15?

Cheeto isn't OP, silly. :rolleyes: I am. I said 40 is unforgiving, and no, I wasn't running tubeless.

Cheeto 01-18-08 08:28 PM

what exactly does OP stand for?

ProFail 01-18-08 08:34 PM


Originally Posted by Cheeto (Post 6009081)
what exactly does OP stand for?

Original Poster, IE the person who started the thread.

Dannihilator 01-18-08 08:34 PM

I run 120psi in my tires.

Zan 01-18-08 08:45 PM

I ride mostly on flat, hard packed trails ('cause the summers here are so hot). I don't have a problem riding at 60 psi in my mountain bike tires. 90 for the roads (on the road bike).

ProFail 01-18-08 08:52 PM


Originally Posted by Mr. Smashy (Post 6009115)
I run 120psi in my tires.

Road Nazi. :D

xcracer13 01-18-08 08:59 PM

If you hit something hard enough to hit your rim, maybe you need to work on your bike skills a little more. I run 25-30psi in my Crossmarks.
How would running your tire at 60psi keep it from getting out of true? If you hit something hard it'll move the rim instead of the tire.

RIC0 01-18-08 09:11 PM

WTF would you run anything lower than 30 psi??? Last I checked a flat or low tires rolls like **** and handles like ****. IF my LBS told me that I"d have to walk out and let everyone in the shop know that the place is ate up with the dumbass.

MattP. 01-18-08 09:19 PM

I run a billion PSI.

gunga din 01-18-08 09:28 PM

Nice work.

You know who you are.

Signed,

A laughing observer.

http://www.huffingtonpost.com/theblo...ock_puppet.jpg

MattP. 01-18-08 10:09 PM


Originally Posted by gunga din (Post 6009357)
Nice work.

You know who you are.

Signed,

A laughing observer.

http://www.aeropause.com/archives/wtf-cat.jpg

crackerjab 01-18-08 10:23 PM

I"m going to assume that what Cheeto's LBS was referring to is that if you run too low of a pressure your rim will take the hit of a root, rock, jump, etc... You want the blunt trauma of one of these to be taken by the tire, not the rim.

EDIT: Here's the commas I forgot for grammar purposes.

",,,"

blue_neon 01-19-08 12:37 AM

I think you guys are forgetting, rider weight (then terrain) is ultimatley what determines your PSI.

30PSI wont suit everyone.

I Run 50-55 on path, probably deflate the rear to 40psi, and front to 35psi when off road, that is on hard packed trails. I sacrifice comfort and some grip for speed.

BFG 01-19-08 01:25 AM

Depends what terrain im riding. I'll pump them up to 50, because i ride to 100% of the trails i ride and then i'll drop it down to what i see fit when i get there.

harov3 01-19-08 02:25 AM


Originally Posted by BFG (Post 6010174)
Depends what terrain im riding. I'll pump them up to 50, because i ride to 100% of the trails i ride and then i'll drop it down to what i see fit when i get there.


You live next door to the trailhead! :rolleyes:

Oh, and around 40-45 for me.

mtnbiker66 01-19-08 05:40 AM


Originally Posted by RIC0 (Post 6009290)
WTF would you run anything lower than 30 psi??? Last I checked a flat or low tires rolls like **** and handles like ****. IF my LBS told me that I"d have to walk out and let everyone in the shop know that the place is ate up with the dumbass.

....and thats what this post is ate up with.

Hobartlemagne 01-19-08 07:59 AM

Warm weather 55, Cold Weather 45 for the MTB, and 65 if I use road tires on it.

120 for my road bikes with 23c tires.

BFG 01-19-08 08:01 AM


Originally Posted by harov3 (Post 6010265)
You live next door to the trailhead! :rolleyes:

Oh, and around 40-45 for me.

Haha! Not quite. Riding up Greenmount Hill isnt fun. That was on a 6 inch hardtail. Secret squirell word is my next bike will be a 7" dually. It'll be great down the hill, but going is going to suck. Im thinking about building a trail in that big ole reserve behind me. With council approval, of course.


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