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-   -   wtb stock wrx tires (https://www.seccs.org/forums/showthread.php?t=7690)

Evo Mike 2009-05-06 11:52 AM

wtb stock wrx tires
 
Hey want to buy stock wrx tires

Size 205 55 16

Thanks

Mike

sedonabugeye 2009-05-06 05:02 PM

i have a brand new set of 205 65 16 kumho solus tires. never mounted. would those work for you?

Kevin M 2009-05-06 05:10 PM

They'd be WAY tall.

sedonabugeye 2009-05-06 05:35 PM

I wouldnt say way tall.. but im just throwing out what ive got layin around the house.

khail19 2009-05-06 08:30 PM

1.75" larger in diameter, I'd say that's way tall.

Evo Mike 2009-05-06 08:31 PM

will those fit? Man, they are for my friend who really doesn't care about the quality of tires.

i gonna go check tire rack now. how much do you want for them?

khail19 2009-05-06 08:33 PM

Are they going on a WRX or something else?

100_Percent_Juice 2009-05-06 09:36 PM

So what, if the car is bumped up in the air less than an inch and some wheel gap disappears, I would be cool with that.

sperry 2009-05-06 10:00 PM

Quote:

Originally Posted by 100_Percent_Juice (Post 133718)
So what, if the car is bumped up in the air less than an inch and some wheel gap disappears, I would be cool with that.

Your speedo would be off a ton, and you'd likely rub over bumps.

khail19 2009-05-06 10:06 PM

Not to mention softer sidewalls, and poorer steering response. If they were going on a Camry or something then I would say the difference is not that important.

sedonabugeye 2009-05-06 10:26 PM

if its ok a stock wrx and he just wants tires, the stock lift kit leave plenty of room for these tires

wrxkidid 2009-05-07 05:50 AM

i got a pair of stock sized blizzaks...kinda the wrong season though

100_Percent_Juice 2009-05-07 06:34 AM

Quote:

Originally Posted by sperry (Post 133721)
Your speedo would be off a ton, and you'd likely rub over bumps.

At 30mph you would really be going 32, at 70mph you would be going almost 75. If you drive the speed limit you will be fine and thats not too hard to account for. Way off is when you lift an f510 and stick 35" tires on it. We don't know what car these are going on but even if its a wrx there will be PLENTY of room for clearance.

Quote:

Originally Posted by khail19 (Post 133722)
Not to mention softer sidewalls, and poorer steering response. If they were going on a Camry or something then I would say the difference is not that important.

If someone is looking for stock wrx tires I don't really know if they are looking for firm sidewalls. For a street driven car these should be totally fine if the person obeys the speed laws.

sperry 2009-05-07 09:40 AM

Quote:

Originally Posted by 100_Percent_Juice (Post 133727)
At 30mph you would really be going 32, at 70mph you would be going almost 75. If you drive the speed limit you will be fine and thats not too hard to account for. Way off is when you lift an f510 and stick 35" tires on it. We don't know what car these are going on but even if its a wrx there will be PLENTY of room for clearance.



If someone is looking for stock wrx tires I don't really know if they are looking for firm sidewalls. For a street driven car these should be totally fine if the person obeys the speed laws.

All I'm saying is, Mike explicitly called out the size he needs. A 65 series tire is significantly taller than a 55 series tire... 10% taller in fact. We're not talking about running 235/40's instead of 225/45's.

Without knowing exactly what car and what wheels these are going on, I wouldn't shrug off that much of a size difference. For example, if I went up 10% in side wall height on my SVX, I'd rub all over the place in the back... every bump and every turn. If I did it on my WRX, the wheels probably wouldn't even roll because the fenders would be sitting on the rubber instead of on the suspension! :lol:

So... maybe those 65's would work, but I would want to know what car they're going on, what size/offset the wheels are, etc. before recommending them as "okay". Like Andy said... if it's a bone stock WRX there's quite a bit of room for more tire... but if these are going on a lowered Honda for example, who knows.

Evo Mike 2009-05-07 11:08 AM

Ak! Sorry this is such a hassel. Its going on a 2.5 ts wagon. I might just tell my friend to buy tires off tire rack. It seems cheapest and easiest there..

Although I wouldn't see a problem with running blzzaks all year! Just more noise.

cody 2009-05-07 11:14 AM

Check here too: http://www.discounttire.com/dtcs/hom...T%7Cpc%7C89503

100_Percent_Juice 2009-05-07 02:27 PM

Quote:

Originally Posted by sperry (Post 133752)
All I'm saying is, Mike explicitly called out the size he needs. A 65 series tire is significantly taller than a 55 series tire... 10% taller in fact. We're not talking about running 235/40's instead of 225/45's.

Without knowing exactly what car and what wheels these are going on, I wouldn't shrug off that much of a size difference. For example, if I went up 10% in side wall height on my SVX, I'd rub all over the place in the back... every bump and every turn. If I did it on my WRX, the wheels probably wouldn't even roll because the fenders would be sitting on the rubber instead of on the suspension!

So... maybe those 65's would work, but I would want to know what car they're going on, what size/offset the wheels are, etc. before recommending them as "okay". Like Andy said... if it's a bone stock WRX there's quite a bit of room for more tire... but if these are going on a lowered Honda for example, who knows.

I thought going from a 205/55/16 to a 205/65/16 is a 6% difference. Either way, I think what has happened here is that none of us had all the facts about why the OP wants what he does and we all have different ideas of what huge, way tall, and ton mean.

cody 2009-05-07 02:45 PM

It's 10% of 205mm (the tread width) taller but you're right, it's a 6.5% increase in diameter. They're 1.61" taller than stock in diameter.

Comparitively, a 235/40/17 is 1.48" shorter than stock in diameter.

Assuming they're going on a stock 2.5 TS they should fit fine, but they'll make the gears seem taller (which puts a touch more stress on them, but I doubt that's an issue with a TS). This could lead to better gas milage on the freeway and a smoother feeling ride at the expense of handling.

sedonabugeye 2009-05-07 03:15 PM

damn you guys have a lot of tire specs..haha! and believe me.. those would never work on a lowered honda.. ive got a sweet rice burner! but the ts, theyd be fine on

cody 2009-05-07 03:29 PM

Tire specs are easy when you use a tire size calculator. :)

http://www.discounttire.com/dtcs/infoTireMath.dos

Kevin M 2009-05-07 03:58 PM

Quote:

Originally Posted by cody (Post 133774)
It's 10% of 205mm (the tread width) taller but you're right, it's a 6.5% increase in diameter. They're 1.61" taller than stock in diameter.

Comparitively, a 235/40/17 is 1.48" shorter than stock in diameter.

Assuming they're going on a stock 2.5 TS they should fit fine, but they'll make the gears seem taller (which puts a touch more stress on them, but I doubt that's an issue with a TS). This could lead to better gas milage on the freeway and a smoother feeling ride at the expense of handling.

Actually they're .20x205= 41mm taller. The aspect ratio applies to both sides of the tire. ;)

Kevin M 2009-05-07 03:59 PM

Also, taller tires reduce your freeway economy, because they reduce at-the-wheels torque and (probably) drop the engine speed farther from the torque peak, so you end up needing more throttle. They definitely hurt your acceleration.

cody 2009-05-07 04:01 PM

So they're taller by 20%!


...of the tread width so who cares. :P

cody 2009-05-07 04:04 PM

Quote:

Originally Posted by Kevin M (Post 133787)
Also, taller tires reduce your freeway economy, because they reduce at-the-wheels torque and (probably) drop the engine speed farther from the torque peak, so you end up needing more throttle. They definitely hurt your acceleration.

Then just drive around in 4th! :P

It's not goint to be as much of an improvement on a 5 speed but it certainly would be on my old Volvos which were all 4 speeds. On the 5MT, I think it would shift your optimum gas milage speed from around 55mph to around 58 mph if I had to guess, but I hear what you're saying. It's not going to help at the lower speeds, that's for sure.

Kevin M 2009-05-07 10:47 PM

Quote:

Originally Posted by cody (Post 133789)
On the 5MT, I think it would shift your optimum gas milage speed from around 55mph to around 58 mph if I had to guess, but I hear what you're saying. It's not going to help at the lower speeds, that's for sure.

Only if it dropped your drag coefficient by .02 or so. And the effect is not speed dependent, but the torque reduction is a larger absolute number in successively lower gears.

pike 2009-05-08 01:22 AM

yeah Im pretty sure he was just trying to help the guy out. since he didnt care about the tires. as stated in thread....hmmm i bet youd like to be 10% bigger. ha I guess Im a noob and Im also pretty young but do all you old people just get your panties in a bunch or what? I guess you could post up formulas and 10% this 5% that. but seriously if hes not autocrossing or anything and hes just driving it on the street... who gives a fuck. seriously... you guys e-thuggin or what? idk but some of you guys on here are some douchy niggas for sure.



ps flame me all you want cause i dont give a fuck.

sperry 2009-05-08 10:06 AM

Quote:

Originally Posted by pike (Post 133815)
yeah Im pretty sure he was just trying to help the guy out. since he didnt care about the tires. as stated in thread....hmmm i bet youd like to be 10% bigger. ha I guess Im a noob and Im also pretty young but do all you old people just get your panties in a bunch or what? I guess you could post up formulas and 10% this 5% that. but seriously if hes not autocrossing or anything and hes just driving it on the street... who gives a fuck. seriously... you guys e-thuggin or what? idk but some of you guys on here are some douchy niggas for sure.



ps flame me all you want cause i dont give a fuck.

I'm pretty sure people don't like tires that cut themselves open via a fender rub on their daily drivers. Those of us with basic educations like to use these things call "numbers" in order to quantify the discussion about whether or not those tires might fit, instead of just making neanderthal assumptions that if you're not autocrossing, a tire only has to be round in order to work.

Also, your shitty attitude and racial epithets are a one way ticket to ban land. No one wants to hear that shit here. This was a relatively gentle and informative argument. It wasn't a panties bunched, e-thugged out, argument until you decided to make it one. So it's good that you don't give a fuck about being flamed, because I think you're a raging douche that's making something out of nothing and is trolling for a ban.

cody 2009-05-08 10:29 AM

^ That. :disco:

Um, yah, sorry for having a discussion about the topic at hand. :?: This discussion was completely civilized and interesting prior to your post, Pike.

Kevin, I have always been told that you'll get the best gas milage by driving in the highest gear that the engine runs smoothly in (RE: no lugging). I actually just read this in Amanda's Honda Civic owner's manual this week too. You're posts in this thead indicating that being below the torque peak is worse for gas milage are certainly news to me... At least we agree that taller tires will hurt your acceleration.

sperry 2009-05-08 10:40 AM

Quote:

Originally Posted by cody (Post 133838)
^ That. :disco:

Um, yah, sorry for having a discussion about the topic at hand. :?: This discussion was completely civilized and interesting prior to your post, Pike.

Kevin, I have always been told that you'll get the best gas milage by driving in the highest gear that the engine runs smoothly in (RE: no lugging). I actually just read this in Amanda's Honda Civic owner's manual this week too. You're posts in this thead indicating that being below the torque peak is worse for gas milage are certainly news to me... At least we agree that taller tires will hurt your acceleration.

Well technically speaking, an engine is most efficient at peak torque (hence the reason it's making all that torque). But what I think that really means is "most efficient at max load". At freeway speeds you're not at max load. Common sense makes me expect to get better mileage on the taller tires simply because the engine rpms are lower. Sure the engine may be running 5% less than peak efficiency at the lower rpm, but if it's turning 10% slower, you're still going to net a fuel savings.

But I'm just making that up in my head... I don't really know how it works. I think you'd need to dyno the car at freeway loads and see where the peak torque is on the motor. Or just get one of those deals that monitors injector pulse-width and directly calculates the fuel you're expending and measure a few different tire sizes on the freeway. I bet there's a ton of info about this on one of the hypermiler forums.

Dean 2009-05-08 11:37 AM

In the days of carburetors, I believe optimal gas mileage was in the gear that required the least throttle or butterfly angle to maintain a given speed. That takes into account or in a way eliminates all the other variables.

Not sure if that is true in the days of DBW, EFI, and throttle bodies, but it probably is.

Kevin M 2009-05-08 11:57 AM

For freeway cruise, you only have to make the engine output match the combined resistance of drag, drivetrain loss, the portion of gravity that the grade of the road makes you work against (or with) and rolling resistance. So the energy you need to maintain a given speed is a constant (assuming the road grade is constant too) and must be equalled. Increasing tire diameter only affects this equation in two ways- it reduces engine speed which reduces the power it's producing at a given throttle input, and it reduces the torque transferring from the drive wheels to the pavement. These two things must be counteracted by the one thing that can- more throttle.

So theoretically I guess it could go either way, but instinct and experience tell me that a little more throttle is less efficient than a little more RPM. The best anecdotal evidence I can give is that my RS got 32-33 mpg on my courier run back in the day, but the wagon only gets 28 or 29 on the same route + level freeway driving from Sac to Vacaville. They weighed about the same, had the same tires essentially, but the car with the bigger, more powerful motor turning at slightly more RPM was 15% more efficient. The conclusion I drew was that the RS was cruising closer to peak torque and therefore was getting more energy out of the fuel and the wagon does.

Evo Mike 2009-05-08 09:50 PM

hhahaha sorry guys, i didn't care about the "type" of tire.. i.e. dunlop, conti, etc. I'm not concerned about how sticky they are. BUT i did state the size i wanted because i KNOW that size works. the size that the other member was trying to sell me wouldn't work because the speedo would be off.. it would look weird as well. I kinda didn't like that.

As far as the "older people" going on the offensive.. These guys have been on this forum for a long time. They also know a pretty good amount about subaru related things. Yeah, they dont like it when you go and have fun with your car on the street but, it's for good reason. IMO, if you wanna go and drive it like you stole it on the street.. it's a free country. Individuals are free to choose to do what they like; however, be prepared to suffer the consiquences. =)

anyway, i hope i get to come out to the meet soon! my classes finally end!


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