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195/50/R15
What do these numbers represent?
I know that the 50 is the thickness and the R15 is the size of the rims, but what about the 195? What is the measuring unit on those numbers?
David
06-28-2006, 10:35 PM
195 is the width
50 is the sidewall
15 is the wheel diameter
195 is in mm from the bottom side of one side wall, all the way around the rubber to the bottom of the other side of the side wall. So you would wrap the measuring tape from the rim on one side to the rim on the other side.
So in the example you gave of 195/50/15R each side wall would be 50 mm high.
50 + 50 = 100. 195 - 100 = 95, therefor the tire is 95 mm wide. The wheel is 15 inches tall, and the tire's speed rating is an R.
I see. Trying to figure out which pairs of tires I should wrap my HX's in. The stock ones are 195/60/R14. I want to get something like ###/50 or 55/R14.
David
06-28-2006, 10:42 PM
also keep in mind that the sidewall measurment is a ratio of the tires width
a 195/50/r15 tire will be shorter than a 205/50/r15
195 is in mm from the bottom side of one side wall, all the way around the rubber to the bottom of the other side of the side wall. So you would wrap the measuring tape from the rim on one side to the rim on the other side.
So in the example you gave of 195/50/15R each side wall would be 50 mm high.
50 + 50 = 100. 195 - 100 = 95, therefor the tire is 95 mm wide. The wheel is 15 inches tall, and the tire's speed rating is an R.
Do I have this correct?
http://img197.imageshack.us/img197/982/untitled7oc.jpg
If the 95 mm is the part that makes contact with the ground, and the 50 mm is the part that is facing the viewer, yes.
ok thanks! also, i really never tried, kind of scared to ruin it, but the air nozzle peice in the rim. how do you take it off? does it come off by force or is it glued? the tire is not on the rim.
I don't fully understand, I'd need to see a picture. Try unscrewing it.
you know the rubber peice where you pump air into. that peice on the rim. you can see it on the inside if no tire is on it.
2genCRX
06-28-2006, 11:46 PM
WRONG in a 195 50 15 the side wall is not 50 mm tall. 50 is the "aspect ratio" which means that the side wall is 50% of the overall width of the tire 195mm DUH!
http://www.streetrodparts.tv/wheel_calculator.htm scroll to bottom
the valve stem is that rubber piece and its press fit so just pull it out once the tire is dismounted
also keep in mind that the sidewall measurment is a ratio of the tires width
a 195/50/r15 tire will be shorter than a 205/50/r15
Looks like David already said that.
but according the drawing, those are the "aspect ratio"
Tyghe
06-29-2006, 08:41 AM
ok thanks! also, i really never tried, kind of scared to ruin it, but the air nozzle peice in the rim. how do you take it off? does it come off by force or is it glued? the tire is not on the rim.
The valve stem is pushed through from the inside, so the only way to get it out is with the tire off. I know the little thing in the middle (whatever it's called) unscrews, but it lets all of your air out, so I wouldn't reccomend it...
Why do you need to remove the valve stem?
Tyghe
06-29-2006, 08:50 AM
in a 195 50 15 the side wall is not 50 mm tall. 50 is the "aspect ratio" which means that the side wall is 50% of the overall width of the tire 195mm
Werd. Also, you don't subtract that number from the width. The width of a tire that is 195/50-15 is 195 mm from sidewall to sidewall, and the sidewall height would be about 98 mm
The valve stem is pushed through from the inside, so the only way to get it out is with the tire off. I know the little thing in the middle (whatever it's called) unscrews, but it lets all of your air out, so I wouldn't reccomend it...
Why do you need to remove the valve stem?
So I can paint my rims. The valve stem, do I push so it in to make it go toward the rim or away from the rim?
2genCRX
06-29-2006, 10:19 AM
push it through from the out side to the in side of the wheel if. you cant undersand that you should really have discount or the big "ZERO" do it for you
no, it makes sense. it just really tough, was scared of breaking it. Where can I buy the little screw thing inside the valve stem?
2genCRX
06-29-2006, 01:48 PM
just get a new valve stem bud you should replace them when changing tires anyway
I'll show pictures of my progress when i get started.
Tyghe
06-30-2006, 11:10 AM
no, it makes sense. it just really tough, was scared of breaking it. Where can I buy the little screw thing inside the valve stem?
I think you are supposed to remove the screw first before you try to push the valve stem through. I don't think you can buy the screws seperately, but valve stems aren't too pricey...
well, there is not screw in the valve stem at the moment. i'll see what a tire shop can do.
k398c21
06-30-2006, 09:29 PM
real simple if the tire is on the rim and full of air you can simply lay the rim flat on the ground with the valve stem facing you and depending on how long the valve stem grab the end of it with a good pair of plyers and then stand on the rim and give a good pull ...the valve stem will come out and your gonna make a loud noise and release the air but no damage will be done ... this is the same trick used if the tire is off the rim to .. then when having the tire mounted just tell the installer to replace the valve stems with new ones...
i see.... i'll give it a try. picked up some paint today :)
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