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Old 04-20-2003, 01:57 PM   #1
WS6toWRX
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Default 17" subs or 18" subs?

Hey all,

Just trying to figure out if I want the 17" or 18". What are the differences? Will an 18" wheel 'slow' down the car because of its diameter? Or should I go 17" for better performance/handling.

And what about accuracy of my speedometer after I put on new wheels?

I defintely want the rota subzeros w/ polished lip ... where can I get them?

thx

chris
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Old 04-20-2003, 02:52 PM   #2
Samirr76
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I dont know if a 17 or 18" sub will fit in the trunk of your subie. I would personlly go for like two 10" subs in a small sealed box. Saves weight and space!










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Old 04-20-2003, 04:34 PM   #3
TheDonPerignon
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Default Re: 17" subs or 18" subs?

Quote:
Originally posted by WS6toWRX
Hey all,

Just trying to figure out if I want the 17" or 18". What are the differences? Will an 18" wheel 'slow' down the car because of its diameter? Or should I go 17" for better performance/handling.

And what about accuracy of my speedometer after I put on new wheels?

I defintely want the rota subzeros w/ polished lip ... where can I get them?

thx

chris

what, did this get moved or something? If not, wrong forum there big guy.
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Old 04-20-2003, 05:35 PM   #4
dRu888
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Quote:
Originally posted by Samirr76
I dont know if a 17 or 18" sub will fit in the trunk of your subie. I would personlly go for like two 10" subs in a small sealed box. Saves weight and space!





that's exactly what I thought he was talking about when i read this title.
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Old 04-20-2003, 07:05 PM   #5
ILBCNU
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Go with the 17" for sure

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Old 04-20-2003, 07:17 PM   #6
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Quote:
Originally posted by ILBCNU
Go with the 17" for sure


Its only for decoration, thats it and thats all.

George
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Old 04-20-2003, 09:27 PM   #7
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Quote:
Originally posted by gproach



Its only for decoration, thats it and thats all.

George
What? I know it's possible to over induldge and go too big but do are you saying that a 16" rim with a 205/55-16 tire package would handle as well as say the same style 17" rim and 225/45-17 tire? I find more use in my 17" wheel package than just some cosmetic value.
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Old 04-21-2003, 02:31 AM   #8
gproach
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Default Woah!

Ok, this has gotten out of hand.

The title of this thread is "17" subs or 18" subs?". I can only assume one of two possible outcomes of this title:

1. He is talking about rims, as this is in the wheels and tires forum. He must have ment "dubs" instead of "subs"

2. He is talking about subwoofers aka "subs" and just dosen't know if 17" or 18" speakers are 'acceptable' in subies.

Once we get into the meat of the post, however, we see that this guy is talking about wheels. He must have ment "dubs" but typed "subs". In this case we are free to make fun of him for both the error and for wanting to put "dubs" on his Subaru.

Now, ILBCNU beat me to the chase and made a reference to Bubb Rubb ( www.bubbrubb.isgreat.tv ). I merely made a reference to his reference.

Put what ever you want on your car, glue freakin oven mits and color forms to it, just have fun.


George
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Old 04-21-2003, 11:48 AM   #9
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Is it really that tough to figure out? He is asking if he should get 17" or 18" Rota Subzeros. Sheesh, he even says Rota Subzeros later in his post!

subs = Subzeros

p.s. "dubs" = 20" wheels, so there is no such animal as a 17" or 18" in "dub".

- Trent

Last edited by peepshow; 04-21-2003 at 12:20 PM.
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Old 04-21-2003, 03:47 PM   #10
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17" is an optimal balance between giving up acceleration performance and gaining dry traction.

Also realize that while wider is better for dry traction, it results in worse snow, gravel, and wet traction.

I think 17 is your best bet.
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Old 04-21-2003, 08:21 PM   #11
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DSMAWD, very good! We need more ppl like you !! ...

Ahh, 17" or 18" subs ... if I was a moron, I'd think that they made that kind of speaker in every brand Holy crap dude, some of you scare me, are you really that thick headed (ok, now I'm thinking A&W Rootbeer!) Dumbass!!! Its Dumass!

Back to my original question, let me specify further...

I am stuck between the ROTA Subzero 'Rim', which is round and accepts something called a 'tire'. Now, this 'rim' is something you put on the 'axle' of your 'car', which is the priority here, uses these 'rims' to travel on. Did I confuse anyone? Take notes cause now its gonna get tough, ok kiddies?

THere are two sizes of 'rims' from ROTA that I am stuck on, those are the 17"x7.5" 'rim' and the 18"x7.5" 'rim'. Now I realize wider is better for dry and wider is not so good for winter ... STOP! Did you look at my name, NeoteriX?! WS6 = 400hp RWD, dude I know what my 11" rims did in the snow! Just for kicks I tried it, I got 3 feet down my driveway and thats it! So I understand that, that's what my stock wrx 'rims' are for .

Now, what difference, assuming I use the Bridgestone S-03 'tire' with my 'rims' is there between the 17" Rota Subzero and the 18" Rota Subzero ...

Holy crap dude, is it that hard? How the heck do some of your whipe your own butts on your own?

So, I --clearly-- outlined my question, could somebody answer it? If you wish to flame, just PM me and do so and I'll handle you accordingly

class dismissed.

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Old 04-21-2003, 10:17 PM   #12
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Have you guys seen the Bubb Rubb video? Say what you want about me, but it is important you see this. I was just explaining the thought process that led me to post what I did (it was a joke).

As to the difference between 17 and 18" subzeros, it just depends on what kind of driving you will be doing. I have 17" prodrives with S-03's and they rock.

Like I said before, buy what you like, use the freakin search if you are really interested in the preformance difference.

George
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Old 04-22-2003, 11:00 AM   #13
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Hey, chill out man. I was trying to be one of the guys on your side and answer some of your questions. I just wanted to be complete in my answer and made sure I gave you the full picture, regardless of what you already know, other people read these threads too. How am I supposed to know from your username about what you know? I didn't even know that a WS6 is a car. Thanks a lot man.


The accuracy of the speedometer will be least affected with the 17", I can't remember what it is, but something in me wants to say .4% variance with the 17" -- and it will judge your speed as being slower than it really is. It gets worse on the other sizes.

If you look in the vendors forum, you'll have no trouble finding the polished or "royal" subzeros. Look for Nino's, Revolution Motorsports, or especially Subydude, he is reknown for excellent customer service.

Last edited by NeoteriX; 04-22-2003 at 01:30 PM.
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Old 04-22-2003, 12:36 PM   #14
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Default Differences between 17" and 18" wheels

You did not say what Tire you were thinking of so -

For reference:
205/55/16 SO3 / 7.6" tread width / 24.9" overall diameter
225/50/16 SO3 / 8.3" tread width / 24.9" overall diameter <edit added
225/45/17 SO3 / 8.4" tread width / 25.0" overall diameter
225/40/18 SO3 / 8.3" tread width / 25.0" overall diameter

Difference in overall diameter between the 16" (stock size) and 17"-18" is 0.4% (Tire pressure variation might make a greater difference.) So, quickly we establish there should be no significant variation in Speedo/ Odometer readings. -

Additionally we can see that between 16", 17" and 18" of the same section (225) there will be no significant difference in tire contact patches. (Indeed, the 18" tire is 0.1" narrower than the 17" and the same size as the 16")

So what are the measurable differences between these two sizes?

They will be:
1. rotating mass (weight)
2. air volume
3. cost

1. When the weight of a rotating mass is concentrated at the edge of the object, more energy is required to move it from rest and more force will be required to stop it. (In comparison with a similarly sized object with the weight more evenly distributed). This means an 18" wheel will take more energy to start and stop than either a 16" or 17" wheel of similar weight.

2. The ability of a tire to absorb (and dissipate) shock within the tire body is directly related to the tire air volume. Very low profile tires just do not flex much. This is good if you want the least possible variation in the position of the tire and rim. Less flex = sure footed feeling and cooler opertating temperatures. The downside is if you do not have a compliant suspension your tire will spend more time NOT in contact with the ground which leads to less cornering ability.

3. 18" rims and tires cost more initially and will continue to cost more each time you purchase replacement tires.

If these things don't mean anything, buy the tirms/tires that look good to you and have fun.

Cheers.
mch.

Last edited by mch; 04-23-2003 at 02:17 PM.
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Old 04-22-2003, 07:25 PM   #15
WS6toWRX
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Holy Crap Dude!

I'm giving MCH the gold medal ... that answer just got copied and stored away into my 'wrx' database, exactly what I was looking for! 17" rims it is!

cheaper is always a plus to a decision when it comes to this hobby!
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