how much air?

Alex2

Member
Jul 20, 2009
35
0
hey this is my first bike and im trying to figure out how much air to put in the tires. It says 90/100 on the back tire and 70/100 on the front is that the presure or something else?

thanks
 

LEllis7motox

Member
Jan 28, 2008
326
0
That's the size of the tire. What bike did you get? I put 9lbs in the front and 12lbs in the rear usually depending how the weather is, and that's on a yz250f.
 

Alex2

Member
Jul 20, 2009
35
0
i have a drz125L Im just using a foot pump that reads pressures so i dont know how much it is in terms that you were using(LB). Thanks for any help!
 

helio lucas

~SPONSOR~
Jun 20, 2007
1,020
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alex, lbs is just a unit for pressure. like 10 dollars is still money...
look at the pump manometer. usualy have two or three scales. one in bar, another is psi, the same as lbs.
use 15 bar or 215 psi on both tiresand you will be fine.
 

High Lord Gomer

Poked with Sticks
Sep 26, 1999
11,788
35
helio lucas said:
use 15 bar or 215 psi on both tiresand you will be fine.
I assume you're kidding...that would blow the tire apart.

Use 0.8 - 0.9 bar (11.5 - 13 PSI).
 

truespode

Moderator / Wheelie King
Jun 30, 1999
7,984
251
I run between 8psi and 10psi front and rear unless I am doing really rocky conditions like in West Virginia, then I run 12psi - 13psi.

Ivan
 

holeshot

Crazy Russian
LIFETIME SPONSOR
Jan 25, 2000
1,822
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I like to run about 12.5 psi front and rear.

I would run 13 psi if it weren't an unlucky number ... :whoa:
 

2strokerfun

Member
May 19, 2006
1,500
1
holeshot said:
I like to run about 12.5 psi front and rear.

I would run 13 psi if it weren't an unlucky number ... :whoa:

I apparently inherited my dad's superstitious nature. But I've managed to overcome this for tire pressure. So, I generally do run 13. I check it every couple of times I ride.
 

truespode

Moderator / Wheelie King
Jun 30, 1999
7,984
251
Just remember that the psi will increase as you ride your bike due to the heat build up.

If you start out with 13 you could end up riding with 16 during the day.

That is why I choose to go around 8 or 10.

Ivan
 

helio lucas

~SPONSOR~
Jun 20, 2007
1,020
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helio lucas said:
alex, lbs is just a unit for pressure. like 10 dollars is still money...
look at the pump manometer. usualy have two or three scales. one in bar, another is psi, the same as lbs.
use 15 bar or 215 psi on both tiresand you will be fine.
:|
i mean 15 psi and 1.2 bar. just because the wheels don´t have a tire holder...
:coocoo:
 
Last edited:
Dec 31, 2008
130
0
be sure to convert your jigawats to decibals before measuring the sydoxometer for correct air pressure volume per square mm
 

RYDMOTO

~SPONSOR~
Feb 16, 2001
612
0
If you want to be crash proof I have some air tanks with Chicago air in them that I can sell you cheap.Whatever you do do not use California air....you bike will be be all squirrely.
 

MikeT

~SPONSOR~
Jan 17, 2001
4,095
11
helio lucas said:
alex, lbs is just a unit for pressure. like 10 dollars is still money...
look at the pump manometer. usualy have two or three scales. one in bar, another is psi, the same as lbs.
use 15 bar or 215 psi on both tiresand you will be fine.
??? You can't be serious.

14 PSI is all you need.
 
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