check the pics on the first page of my showoff thread...


they are 215-45-17

 

those look good. I might just go with the 45's instead of the 50's, but if anyone out there is lowered on 50's and 17" rims let me know, I'm trying to find a price on my tires, because the sooner I get my tires the sooner I can get my new rims on.

 

205/40/17 is what i have... any thing bigger than a 40 is TOO FAT IMO... id rather have a rubberband wrapped around my rims than a big thick tire...

 

haha Yeah but it also looks great on your car because you're lowered alot more than me, I want as little wheel gap as possible.

 

ah yeah true... i forgot about that... k yeah, go 45s... my tC had 45s... hang on and ill get a pic...

 

it was dropped w/ Tein S-Techs

 

that looks good too. hmmm... decisions decisions

 

well I priced the 205-45-17's and I can get them for about $390 mounted and balanced for a set, the 205-50-17's are the same price pretty much lol.

I tried googling cobalts with 205-50-17's and nothing lol.

 

Here's my new rims BTW

those have 205-40-17 but the tires are too skinny and would look funny on my car.

 

hmm... im still thinkin 45s... 50s are tooo fat..they'd make those rims look like 15s. my sister's s10 xtreme has 205/50/16s or w/e they are & they look good on the truck... but for a car... 45s... i dont think youd have a wheel gap all that big, would ya?


EDIT: i like those! lol

 

TyreStretch.com - Image Library

do ittttttt

 

yeah you're right I see more 45's than anything and it looks good on a lowered car, I'd be happy to compensate for my 18's which are 215-40-18's So I'm terrible at math, but I wouldn't mind if the outside tire diameter of the 17's matched the tire diameter on my 18's

 

ok so 215 x .40 = 86. that's your side wall height in mm
1 inch = 25.4mm so 18 x 25.4 = 457.2 now add your side wall height 457.2 + 86 = 543.2

so from tread to tread the wheel in theory is 543.2mm in diameter (there may be a slight stretch if the width of the tire is not the exact width of the wheel lowering the side wall)

now on a 17 we're going to change 457.2 to 17 x 25.4 = 431.8 add the 215/40 to it and now we have a wheel that's 517.8mm

let's try a 215/45 on the 17 now. 215 x .45 = 96.75 + 431.8 = 528.55

ok so...we're getting warmer. now let's try a 215/50.
215 x .5 = 107.5 + 431.8 = 539.3

pretty darn close if you ask me. the wheel is slightly smaller now and the speedo will read a tad higher than actual speed. maybe by 1mph cause you're only off by 4.1mm

hope this helps

 

yes that helped alot, So it wouldn't matter that my 18's now are 215, and the 17's will be 205 will it?

also can't I put a 215 on my 17" rims eventhough there's 205's on it now?

I thought I heard something like that.


I feel like a complete tard when it comes to tires lol.

 

it will matter, because the aspect ratio of a tire 215/40r18 is the percentage of the tire width 215/40/r18 (measured from wall to wall) so a 205/40/r18 will have a thinner wall than a 215/40/r18. catch my ff_drift? :toung:

putting a 215 on a wheel that calls for a 205 will make the side wall bulge and you might have rubbing problems. you may want to re-calculate for that and put an even larger wall on the 205. people do put fat tires on their mustang wheels and stuff all the time though. there's guys doing 335's on their 8 inch wide wheels. it does bulge but since it's only on the rears and those guys don't really care about being low and all they don't have to worry about rubbing.

 

gotcha so 205-50-17 is the size I need correct? lol thanks for being patient with me, I'm trying to catch on.

 

543.2mm is your 18's overall diameter tread to tread.
a 205/50/r17 will be 534.3mm
205/55/r17 will bring you to 544.55

it depends now, a 50 wall tire will bring your speedo up a little bit but you'll have a thinner wall which to most people is a more appealing look.

a 55 wall is going to be optimal size, but it's going to be pretty fat and may not look so great.

 

ok thanks I think I'm going to go with the 50 then, doesn't matter if the speed-o is a little off, I never do the speed limit anyway lol

thank you so much for your help, hopefully in the next few days I'll have the tires mountes and put the new rims on my car

 

not a problem always looking to help. good luck with that.

 

where should i find my first set of after market rims without spending a shit ton, (just lost my job)

 

check ebay, craigslist...

 

yea, those posted above are you best beat. I got the wheels on my car for 410 shipped off of eday, problem is finding ones you like, took me 3-4 months to find these. Another alternative though still pricey in the end is a card from say Discount tire, I have a credit with them for 1200. I applied, got that amount and just pay as much as I can afford once a month. Right now i am playing off a wheel and tire combo I got on my cavalier from them. When that is paid down I want to get new tires for the balt that are PRICEY!