Tire sizes and more

Because I found a lack of knowledge on estimating tire sizes here is the correct way to calculate/compare tire sizes:
Tire width (mm) : 25,4 x Q x 2 + Rim diameter
e.g.: Tire 275/60-15 Tire diameter = 275 : 25,4 x 0,6 x 2 + 15 = 27,992 OR 27 992/1000 inch
Tire 245/50-16 = 25 645/1000 inch
Tire 225/50-15 = 23 858/1000 inch
Tire 225/60-15 = 25 620/1000 inch
Note: Tire 2 and 4 are comparable; no speedometer correction is necessary.
OR LONGER: Imagine a wheel from floor upwards: rubber - rim - rubber
1. Divide the width of the tire (in Millimeter; e.g.: 275 mm in 275/60-15) by 25,4 . This is the width of the tire in inch.
2. Multiply the result of "1" with the percentage Q (following the width; in decimals! e.g.: 60 in 275/60 becomes 0,6). This is the height of the tire wall.
3. Multiply the result of "2" with 2 (you have two times rubber from floor upwards)
4. Add the diameter of the rim (in inch, e.g.: 15 in 275/60-15)
Now you have the wheel diameter in Inches.
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124mph wrote:

Lack of knowledge? No just lack of desire to AGAIN repost something that I've posted before. Do a damn google search.
I wouldn't even be posting this, but your formula is wrong and your explanation of the aspect ratio is poor.
    Martin     '01 Formula -    MTI Air Box Lid, K&N Filter, Hurst-6,             SLP Cold Air Induction & Smooth Intake Bellow             Corsa Catback w/Premium Tips     '83 V45 Magna
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Solution #1:
Look at the door jamb sticker. Follow what the mfg recommends. They do this for a reason. Something tells me you have a lot less engineering knowledge about what the proper tire size should be as opposed to GM.
(Newsflash: More than an educated guess).
Solution #2:
See a tire shop. What would they know? They only sell the things for a living.
Comment #1:
No one owes you an answer and the information is free. Take it for what it's worth. Some good, some bad, some inbetween. Your responsibility to do the right thing with it. Your car. No one else cares. I have the right tire sizes on my vehicle. No problem here.
Beyond that, coming in here with a smug comment like that is a sure fire way to make sure no one competent gives you good advice.
Newsflash #2: Count yourself out of the competent ranks of this newsgroup.
Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director '80 Carousel Red Turbo T/A, 27k orig. '79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig '84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 143k and still going....
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Bigjfig wrote:

Busted. My Jimmy takes 205-75/15's. Look like pizza cutters. When I replaced them I went with 235-75/15's. Why? My inlaws had a 91 S-Blazer with those so I knew they'd fit, and that would be an acceptable size for a fullsize truck - I don't expect my Jimmy to survive the winter... the rust is getting bad.
The other reason - they handle overloaded better - did you know you can put two SBC's in the back? And pull a trailer with 3 more on it? Of course, the rear leafs were basically flat... good thing this is just moving around my yard... I couldn't imagine the 2.8 accelerating very hard on the highway with a load like that..
Lastly, my Jimmy has 4.10 gears (which are gonna come in handly in my dirt track car) and the mileage went up when I went with the bigger tires... not even including my speedo/odo read 6% low.
Did you know the 4 wheel drive S-Series rear end is about the same width as a 2nd gen? I wouldn't call it an upgrade, but for a dirt car where "close enough" is good enough it'll probably fit. If not, we'll make it fit. :)
Ray
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I was given a 1991 S10 Blazer from a neighbor, I was starting to do things to it, and then he took it back. LOL.
Long story, but I gave it back and I'm just going to bill him for whatever I put into it.
I did drive it a few times (smoked a bit though), and it was handy for runs to the hardware store and such! :). Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director '80 Carousel Red Turbo T/A, 27k orig. '79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig '84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 143k and still going....
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Bigjfig wrote:

You responding to me Joe? Or is your comment and newsflash for Mr. 124mph?
    Martin     '01 Formula -    MTI Air Box Lid, K&N Filter, Hurst-6,             SLP Cold Air Induction & Smooth Intake Bellow             Corsa Catback w/Premium Tips     '83 V45 Magna
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Martin:
Not you.
To the other guy that came in here expecting us to bow to his every need for advice.
Rule #1 on the Internet: No one owes you squat. However, most folks enjoy helping each other out as this is how you learn.
Come in with a 'tude expecting something and my answer will be pay through the ass and find out the hard way. Always an option.
Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director '80 Carousel Red Turbo T/A, 27k orig. '79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig '84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 143k and still going....
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Hello all,
excuse me to be so stupid to bring a formula to you.
This formula is the common way to precisely calculate the (static!) diametre of a cars tire.
Excuse me to try to help out where I did find a mistake. In

the
992/1000
necessary.
275/60-15)
width;
tire
floor
this
the
on
fire
newsgroup.
going....
124mph?
for
the
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124mph wrote:

Do you shave your knuckles or does their dragging the ground keep the hair down?
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snipped bullshit from some moronic twit at Siemens electrical group.

Nah....he does not have to...his mom does him right after she finishes on herself..
Morons like him make me regret my time at MBB...thankfully, never have to worry about that again....
Someplace around here I have some pics of the speedlimit signs around Hamburg on the AB....
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124mph spilled my beer when they jumped on the table and proclaimed in
<snip>

What part of Seimen's "Computer Usage Policy" do you not understand?
NOI
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GLK9MM wrote:

All you need is some autobahns!
--
Pete
The journey IS the destination
  Click to see the full signature.
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Yesssssss, Pete!
124mph

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that.
call,
you
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The formula above is correct.
Do not believe Martin, GLK9MM. He does not have the knowledge to correct
anybody.
The formula can be found in the net if you want another reproduction of it, e.g.
PepBoys:
http://www.pepboys.com/learning_center/car_care/articles/tire_diameter.html
Thats exactly what 124mph wrote!
Martin, GLK9MM, you say the formula is wrong, where did you have
mathematics? In preschool resp. kindergarden?

necessary.
275/60-15)
width; in

tire
floor
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John Fulton wrote:

Looks to me like you're just a sockpuppet for 124mph. Trolls son't fare well around here. You might want to rethink your little game.
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John Fulton wrote:

Ahhh....a new troll to be destroyed.
Not one single statement from your post is correct. But hey.....bring it on. I'll be happy to plonk you just like I did the 124 idiot.
    Martin     '01 Formula -    MTI Air Box Lid, K&N Filter, Hurst-6,             SLP Cold Air Induction & Smooth Intake Bellow             Corsa Catback w/Premium Tips     '83 V45 Magna
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Thank you all. We have learned a lot from the US!
I want to excuse me for all the problems I have made.
We found it interesting how you react. The formula IS the same and correct, your reaction is not. I show you a formula from Pep Boys and ... I receive "Whether the formula was right or not is not the question". The FIRST ANSWER WAS it is wrong (your formula is wrong). And: I for myself find it important that you really believe there is a speed limit everywhere in Europe/e.g. Germany. Nice to see, you already know that Germany is IN Europe. When in the US I was asked (two times!) where Europe is - is it near Italy? Or, is it the state in the east close to coast line (was in Daytona Beach). This guy did finish college . We learn it in Kindergarden.
My 130 is mph not km/h. It was my average speed for 2 hours on a major highway. Same in Italy with 100 mph. We know that you are not able to calculate in km, cm or decimals. So WE did convert.
... while illegal to drive at those speeds ... we do it legaly. And even if it is 130km/h and not 130 mph it is far more you are allowed to drive legally. Do you know continental Europe drives on the right hand of the road? Years ago I was told we do not (@ east coast). And the US did insist on this!
... your car sucks. And who told you which car I drive?
... Whether the formula was right or not is not the question. Yes, is not? And why was the FIRST mailing "your formula is wrong"????. Sucks.
... speedlimit signs around Hamburg on the AB.... Yes, at all mayor cities in Germany but not outside of them. They have a speed limit end sign in Germany! E.g. Italy has no special speed limit around Rome at AS.
... The days of unlimited speed ended there years ago. Who in heaven told you this????? Especially those in Germany have no speed limit between major cities (but this only then when it is secure enough to drive speeding). And: When limited the speed is limited to 130km/h (81mph) or less. When the speed limit ends esp. Germany has unlimited speed allowed.
... that over engineer, yet under build everything. We will learn like I have learned from you by this conversation. But, why then are you so hot to drive an over engineered BMW, a Mercedes (which Germany uses for taxi), an Lamborghini, Ferrari, Rolls, Bentley????????????????
Last at all: Does Montana still have no daylight speed limit? Question: When there was no speed limit (@daylight time) why told me a police officer if I would exceed 65 I would be fined USD 500.- ???? I ask you: No speed limit and if I exceed the limit I have to appear before the judge? You need not to answer. Sucks. Dont make excuses.
Please no replies to this mailing. We have heard enough. We love Michael Moore!
Vive la france!
Omnia mea mecum porto.
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If you learned so much from the US, why don't you shut your trap and listen for once?
You might actually learn something.
Newsflash: Your car sucks. Your country lost the war. Your gross national product isn't even close to ours.
Newsflash #2: Mercedes and the other Germans have gotten their lunch eaten by Lexus and Infiniti when they scoffed at their product in 1990 as never being on par with the Germans.
Newsflash #3: The cheap entry level German cars out today are as a result of the Japs eating your lunch and spitting it back out you.
Newsflash #4: Your cars are overrated junk. A 20 year old Chevy will outlast it by light years and cost 1/3rd of the money to repair.
Nothing against Germans, I just have a lot against stupid ones.
Newsflash #5: You're in this category.
Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director '80 Carousel Red Turbo T/A, 27k orig. '79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig '84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 143k and still going....
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