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The Pub For General Automotive Related Talk |
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07-01-2008, 08:22 PM | #1 | |||
Mandy Moore FTW!
Join Date: Nov 2005
Posts: 211
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According to Mazda6tech (the man certainly *seems* to know what he's talking about) up-sizing your wheels is just for looks and you stand to lose in terms of handling and performance (especially acceleration and braking.)
Read here: http://www.mazda6tech.com/index.php?...d=44&Itemid=50 Quote:
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07-01-2008, 08:30 PM | #2 | ||
Regular Member
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Location: Perth, WA
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Probably why reasons you don't see V8 supercars (or most other forms of motorsport) running 18-19 inch wheels. They focus more on wheel width.
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07-01-2008, 08:37 PM | #3 | ||
LPG > You
Join Date: Dec 2004
Location: Sydney, NSW, Australia
Posts: 4,277
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Unless the car was designed for it, more diameter = slower car.
I know some retarded people who think a 20" wheel with a super low profile tyre will give better grip and performance then their car's original 16" wheel will. No extra width either.
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07-01-2008, 08:43 PM | #4 | ||
COUPE WHORE
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Posts: 2,489
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dont know bout tall wheels but fattys are my favorite ,xa xb xc coupes were made for them
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07-01-2008, 08:50 PM | #5 | ||
Oo\===/oO
Join Date: Jan 2007
Location: Tamworth
Posts: 11,348
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Depends on what car, and what driving. If you are buying 20in chromies for your falcon (or what ever) its for the bling...
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07-01-2008, 10:14 PM | #6 | |||
FF.Com.Au Hardcore
Join Date: Dec 2006
Location: Melbourne
Posts: 4,523
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Quote:
Nothing like the sight of 305/55 15's under the back of a Falcon coupe. Next to that your 235/35 20's do look like they belong on a pulsar.
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07-01-2008, 10:18 PM | #7 | ||
Parts bin special
Join Date: Mar 2005
Location: Narre Warren, Vic
Posts: 8,276
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Personally, I go for fat tyres rather than large diameter. That's why I got the SVOs. They are 7" wide on the front, 8" on the back (compared to the old 6.5" turboblades) but are only 16" in diameter. They give it a tough stance.
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07-01-2008, 10:19 PM | #8 | ||
FF.Com.Au Hardcore
Join Date: May 2006
Location: Sydney, NSW
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I never regretted upping my wheel size by 2". All pros, no cons. Well, more expensive tyres, but meh...
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07-01-2008, 10:20 PM | #9 | |||
LOW AND SLOW
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Location: Geelong.
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Quote:
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07-01-2008, 10:22 PM | #10 | ||
Regular Member
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Location: Brissy!
Posts: 472
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its really just for show like mine!!!!! and it helps me not to speed or do wheel spins etc i dun wanna spend 325+ for tread for 1 wheel..
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07-01-2008, 10:23 PM | #11 | ||
FF.Com.Au Hardcore
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Location: Adelaide SA
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i would have to agree on the whole enhancing look thing (provided you pick the right type), for instance when my fiance bought some 17's for her 06 lancer it looked so much better than the standard 14's with hubcaps, but the problem was it had a bumpier ride.
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07-01-2008, 10:48 PM | #12 | |||
AU Falcon Man
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Quote:
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07-01-2008, 10:58 PM | #13 | ||
rocknrolla
Join Date: Dec 2004
Location: Adelaide, SA
Posts: 1,589
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I think he is over stating a lot of the real life effects of larger wheels. most of those things would not even be able to be measured their effect would be so small.
you could equally say say that a taller wheel gives you better fuel economy because it makes your final gearing taller.
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07-01-2008, 11:06 PM | #14 | |||
Miami Pilot
Join Date: Jan 2005
Location: ACT
Posts: 21,704
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Quote:
Yes, the weight of the wheel may be an issue in terms of momentum, but it's not like a 19" wheel is twice as heavy as a 17" - there'd be a couple of KGs per wheel in it, and you can get that just between different brands of the same size anyway. Mazda6person hasn't really thought about what he is saying, or has only thought enough about each point, but not looking at the whole picture (or wheel).
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08-01-2008, 12:02 AM | #15 | ||
Performance moderator
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So whats wrong with these ??? LOL...
http://www.fordforums.com.au/attachm...chmentid=38158
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08-01-2008, 12:07 AM | #16 | ||
FF.Com.Au Hardcore
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I think generally they started getting bigger from 14" then 15 and so forth due to the brakes behind em.
I reckon you'd have to be crazy to have anything bigger than 17" without sporting some Serious brakes. Go the 15" Pro Convo's.
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08-01-2008, 01:42 AM | #17 | |||
LPG > You
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Location: Sydney, NSW, Australia
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Quote:
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08-01-2008, 07:31 AM | #18 | ||
Banned
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Anything bigger than 19" in my book is stupid. I think 18's are the perfect size, hence why you see proper Japanese fast cars (Skylines, Supras, EVOs etc) all run 17" and 18" rims. It's all to do with unsprung mass in terms of performance. Reduce the unpsrung mass means better braking, better acceleration, cornering etc. IMO, 20's on a normal sedan or whatever look retarded and only serve to make the car owner look like a complete tool who knows nothing about car dynamics. Going to larger rims almost certainly means lower profile tyres which in turns gives rubbish ride quality. Most of the time you can't even buy decent brand tyres for bigger rims, so people go with brands like "Wanli" which are simply horrible.
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08-01-2008, 07:35 AM | #19 | ||
The one and only
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I think 17 is about the best size, I ran these for years (v8 supers still do)
I have 20's now just for looks.
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08-01-2008, 07:38 AM | #20 | |||
FF.Com.Au Hardcore
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08-01-2008, 09:19 AM | #21 | |||
carburettor
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i like my 18" mags they look good and they are plenty wider than stock im running 265/45 rear and 255/40 front this is for the skyline.
never had a problem i run federal 595s on both front and rear so they arent really that much more expensive.
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08-01-2008, 09:27 AM | #22 | ||
FF.Com.Au Hardcore
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Race cars generally run 13" or 15" wheels, and by race cars I mean open wheelers. Formula 1, Formula 3, A1GP run 13" and Indycars/Champcars run 15".
Sports and prototype cars (ie Lemans) are heavier and hence need bigger diameter brakes to haul up the cars. To fit over the brakes, these cars need bigger diameter wheels. This is also why Indycars/Champcars run 15" rims compared to 13" rims on F1 cars, as the Indycars/Champcars are around 135kg heavier and don't have carbon discs. |
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08-01-2008, 09:29 AM | #23 | |||
FF.Com.Au Hardcore
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08-01-2008, 09:33 AM | #24 | ||
Donating Member
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I think the Mazda guys was making the point that it's not the weight, it's the radius of gyration that can affect acceleration and braking performance.
As you increase the rim size you more than likely will increase the radius of gyration and this will have an affect, although I'm not sure what the real world impact is. You also need to start looking at maintaining the strength while keeping the mass of the rim under control.
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08-01-2008, 09:34 AM | #25 | ||
Back in a Ford
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I find a lot of local people around here spend far too much on large rims, and no-where near enough on fitting decent rubber.
It won't look fully sick after you lose control in the wet and smash into a kerb, because you skimped and bought crap tyres! Personally I'd rather stick to a 16"/17"/18" rim with a decent brand of tyres. Cheers Darran
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08-01-2008, 09:34 AM | #26 | |||
carburettor
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unfortunately i have to agree with the post above^^^
it also depends on what kind of use your putting them to.
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08-01-2008, 09:44 AM | #27 | |||
FF.Com.Au Hardcore
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I did upgrade my brakes from AUI to BA as I did notice a degrade in braking, with the stock calipers, but good pads and slotted rotors. Upgraded to BA size calipers and rotors and is is much better. My choice was purely looks, not on track performance.
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08-01-2008, 09:46 AM | #28 | |||
FF.Com.Au Hardcore
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Wouldn't mind throwing some Prodrives, Work or Rays/Volk on my car but they are expensive : |
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08-01-2008, 10:17 AM | #29 | ||
Only an xr6...
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Location: Brisbane
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All I know is when I get bigger rims I'm keeping my 17's for the track, doesn't seem right taking 19's on a track.
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08-01-2008, 10:36 AM | #30 | ||
Broken
Join Date: Dec 2005
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My experience after many track day events is that there is NO performance gain to be had in swapping from 17 - 18' wheels on the circuit.
I had both sizes with the same tires (in the different diameter) on the car on the same day on the same track. six laps with 18's, a dozen laps with 17's. It was not a perfect test, as the 17's had wider tires (255 compared with 245) but the results were conclusive. There was bugger all in it, not enough to get a difinitive better or worse result. If there's not an 'improvement' on the track, there aint no way you'll see one on the street. Bling effect only. And 20's on street cars - ha ha, especially when they fit those piddly little 235 or 245's........ which I reckon is way out of proportion to the wheel diameter. Fit 'em up with a 285 or 295 and then we're getting serious.
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