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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)

 Rincewind8 01-21-08 02:48 PM

Originally Posted by Cheeto (Post 6022940)
Pounds per square inch.=PSI
Its the pounds of pressure per square inch of your tire.

It's force per unit area, not pressure per unit area. :p

 mtnbiker66 01-21-08 04:02 PM

Originally Posted by gastro (Post 6023086)
Laymans terms please. Not everyone here has a masters in physics.

Is that tire weight were talking about?

 wethepeople 01-21-08 05:26 PM

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

135 front 120 rear on my BMX.

80 front and back on my fixies.

 Cheeto 01-21-08 05:44 PM

wow lol.
Im not going to waste time answering questions that people probably already know lol
it the measure of air in something.
its the force exerted per square inch.
its the unit of measurement for pressure.

 TheFlip 01-22-08 04:58 PM

 Trekbikedude 01-22-08 09:09 PM

oh

make sure you run a Kevlar bead, I heard they're lighter.

 Fat Boy 01-22-08 10:38 PM

Originally Posted by gastro (Post 6023086)
Laymans terms please. Not everyone here has a masters in physics.

Maybe not, but I'm guessing you've got a Ph.D in dumbsas!

(misspell on purpose)

 cryptid01 01-23-08 01:29 PM

Originally Posted by Fat Boy (Post 6032539)
Maybe not, but I'm guessing you've got a Ph.D in dumbsas!

No, my doctorate is in whupass. I only got my GED in dumbass.

 dminor 01-23-08 01:31 PM

^^:lol:

 ProFail 01-23-08 04:08 PM

Originally Posted by TheFlip (Post 6030380)

Isn't that like 400PSI?

 mtnbiker66 01-23-08 05:02 PM

Originally Posted by Fat Boy (Post 6032539)
Maybe not, but I'm guessing you've got a Ph.D in dumbsas!

You should beg for his mercy......now.

 Fat Boy 01-23-08 05:11 PM

Originally Posted by gastro (Post 6035643)
No, my doctorate is in whupass. I only got my GED in dumbass.

Well played!

 cryptid01 01-23-08 07:54 PM

Originally Posted by Fat Boy (Post 6037253)
Well played!

Gee thanks. I hope I didn't offend your delicate sensibility by spelling "ass" correctly.

 blue_neon 01-23-08 08:02 PM

Originally Posted by ProFail (Post 6036809)
Isn't that like 400PSI?

...no. No it is not.

 Cheeto 01-23-08 08:14 PM

gastro, that was great!!!
hey while were on the topic of PHD's and stuff,
does anyone have a mojor in math? lol
Im having some Pythagorean Theorem and simplifying radical Problems LOL!

ANyway,
I ran 60 in my BMX also, until it was stolen =(

 EthanYQX 01-23-08 08:19 PM

Originally Posted by Cheeto (Post 6038362)
gastro, that was great!!!
hey while were on the topic of PHD's and stuff,
does anyone have a mojor in math? lol
Im having some Pythagorean Theorem and simplifying radical Problems LOL!

ANyway,
I ran 60 in my BMX also, until it was stolen =(

Pythagorean theorem is easy. Radicals I hate with a passion. What troubles are you having?

 Cheeto 01-23-08 08:28 PM

Just was never taught how to simplify the dang things (my algebra teacher got up and left the school one day, never came back.... so he screwed us ALL) and now in geometry its killing me LOL

i got the whole a2+b2=c2 thing
but Simplifying radicals is killing me

like this one word problem here:
A small commuter airline flies to 3 cities whose locations form the vertices of a right Triangle.
The total flight distance (from a-b-c-a is 1400 miles.
it is 600 miles from the two cities that are farthes apart. Find the other two distances beween the cites.

to sum that up Is what im getting is the Hypotenuse is 600, and the two legs are unknown.
i cant got anyfarther lol.
-- BTW this is 10th grade math.

 EthanYQX 01-23-08 08:29 PM

Can't help ya there, I'm failing math.

 Cheeto 01-23-08 08:33 PM

LOL, i'll soon be failing..

i have a 51 in spanish... thanks to a quiz... she gave us a quiz (25% of grade) THEN tought us over the stuff on the quiz... and Im normally an all A student...
=(

 giant rules!!! 02-04-08 04:55 PM

i keep mine at 50psi...it keeps them hard for climbs, yet, they still have traction when you want to go down.

 EthanYQX 02-04-08 05:30 PM

I run slicks at 80 on mud.

 Cheeto 02-04-08 06:28 PM

I run bontrager connection trails at 63

 While At Rome 02-07-08 03:27 PM

55 or so psi. 15 psi jesus. after i got 3 flats in 1 day i decided to go from 40 up to 55 psi.

 R33F 02-07-08 04:16 PM

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 ****.

Wouldn't that depend on the type of riding your doing ?

I run 25 - 30 psi on the downhill bike on loose sketchy tracks. More tyre surface area for traction. If your not rolling fast enough on a downhill track (?) put some pedals in.

Obviously run them higher on the XC bike.

 pyroguy_3 02-07-08 07:04 PM

Originally Posted by Cheeto (Post 6038439)
A small commuter airline flies to 3 cities whose locations form the vertices of a right Triangle.
The total flight distance (from a-b-c-a is 1400 miles.
it is 600 miles from the two cities that are farthest apart. Find the other two distances beween the cites.

Set up a system of equations, one being x+y=800, the other being x^2+y^2=600^2, then solve for either x or y in the first equation, plug it into the second and solve for the remaining variable. The answer is 258.579 miles and 541.421 miles. x and y are the two unknown distances. Didn't you say you wanted to go to a military academy...?

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