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Old 11th June 2012, 17:06   #16
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Default Re: Structure Wheels - Steelies that look like alloys!

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Originally Posted by Rehaan View Post
Steel wheels end up bent at the rim. These would also end up bent at the rim, since the rim is the same. Its just the dish thats different, which is not the part which takes the brunt of a hit.
Could it be because the dish is strong, hence the weakest point (or rather the nearest point) in the wheel is affected ? I am saying this with the vagaries of our roads and highways where we happily cruise at good speeds thinking that the road is smooth and without any notice comes a sharp increase in the level of the road and before we can brake, the car goes over it with a thud which resonates in your ear. This happens way too regularly.
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Old 11th June 2012, 17:19   #17
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Default Re: Structure Wheels - Steelies that look like alloys!

These have been around a decade actually and were first seen on SUVs. For some reason they haven't caught on. My guess is customer prefers the real deal, a shiny alloy.

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Originally Posted by Rehaan View Post
"Strength" is a very vague term, especially when dealing with metals. See my last para below.

The police cruisers probably use these steel wheels for a few reasons :

1) Cheap
2) Cast alloy wheels will crack when hit hard. This will leak more air than a steel wheel, which will only dis-form/bend. Forged wheels on the other hand and super light & "strong", but they will shatter when there is a hard enough impact.
One of the requirements for police cars is that they should be able to climb up and jump off kerbs repeatedly without any damage. Some of the modifications carried out to enable this are stronger steel wheels, wheel bearings, stiffer raised suspension. This is also the reason you'll never see a low profile tire on a cruiser.
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Old 11th June 2012, 17:50   #18
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Default Re: Structure Wheels - Steelies that look like alloys!

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Originally Posted by directinjection View Post
Safari lower end models (from DiCOR 3.0 onwards) also come with these.
Even Scorpio initial models came with these structured wheels before they moved to the present design.
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Old 11th June 2012, 19:05   #19
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Default Re: Structure Wheels - Steelies that look like alloys!

Actually structured wheels are wheels which are dressed with fake alloy trims/faked to look like alloy wheels.

Looks neat though..
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If my car similar wheels then i wouldn't want to upgrade to cheap alloys just for the sake of looks. Since these are five spoked steelies i guess it would weigh less than dish steelies too.

Source: http://www.vectra-c.com/forum/showth...ructure-Wheels
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Old 12th June 2012, 20:35   #20
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Default Re: Structure Wheels - Steelies that look like alloys!

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Originally Posted by Rehaan View Post
You could change your wheel design / style whenever you wanted, for just a few hundred or thousand rupees!
Quote:
Originally Posted by Sankar View Post
If my car similar wheels then i wouldn't want to upgrade to cheap alloys just for the sake of looks. Since these are five spoked steelies i guess it would weigh less than dish steelies too.
Most people, if not all, buy alloy wheels for the looks alone. If steel wheels looked half as good at a significantly cheaper price, the market for after-market alloys would be dead overnight. From this thread, there doesn't seem to be a significant disadvantage on good looking steelies. Thus, I'm wondering if there is any kind of nexus between alloy & steel wheel manufacturers (buyback & exchange rates) or are a majority of alloy & steel wheels manufactured by the same companies who want to avoid cannibalization?
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Old 13th June 2012, 08:11   #21
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Default Re: Structure Wheels - Steelies that look like alloys!

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Originally Posted by smartcat View Post
I just recalled that some versions (not top end) of Chevrolet Tavera always came with these "structured" steel wheels. So in a way, Chevrolet India has been a "pioneer" in introducing these wheels in India.

Attachment 939345

Attachment 939346

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[Pics from Google Images]

So you are right - if these wheels have been used in a Tavera, there is no issue of durability/strength as such. Perhaps then, such wheels are a bit more expensive than standard steel wheel, but not as expensive as an alloy?
I was trying to recall exactly this.
These looked better than quite a few alloys I have seen.
AND theyre deep dish at that!


Steel wheels dont give options for a lot of design work, since you cannot have great big openings/holes in them.
Just doesnt support as rigidly as an alloy.
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Old 13th June 2012, 08:17   #22
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Default Re: Structure Wheels - Steelies that look like alloys!

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Originally Posted by anb View Post
Perhaps Low strength is the reason. Steel wheels have less strength than alloy wheels. Reducing the amount of steel may results in less strength.
I'll have to agree with this. For our road/load conditions, the last thing needed are wheels with reduced tensile strength.
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Old 13th June 2012, 12:32   #23
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Default Re: Structure Wheels - Steelies that look like alloys!

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Originally Posted by esteem_lover View Post
Could it be because the dish is strong, hence the weakest point (or rather the nearest point) in the wheel is affected ?
When the wheel faces an impact, its usually at a point. The energy/force of that impact then spreads out through the wheel (along the rim, up the spokes/dish, etc).

So the point of impact faces the full brunt of the hit. The rest of the wheel only gets a fraction of it. Also the way the energy transfers around the rim and through the spokes means that you can get away with fairly thin spokes (in comparison to the rim) and still be okay. Think of a bicycle wheel for example. Or this motorbike alloy:

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Image source

Quote:
Originally Posted by Mpower View Post
These have been around a decade actually and were first seen on SUVs. For some reason they haven't caught on. My guess is customer prefers the real deal, a shiny alloy.
Well i guess they weren't that readily available as an option, and hence they never really got the chance to catch on? (atleast in India).

Also the wheels that Sankar has posted are MUCH better looking than the Chevy wheels that others are posting up.

Quote:
Originally Posted by Sankar View Post
Actually structured wheels are wheels which are dressed with fake alloy trims/faked to look like alloy wheels.
This is what really makes the visual difference!

Quote:
Originally Posted by Sankar View Post
Since these are five spoked steelies i guess it would weigh less than dish steelies too.
Not sure about that. I'd say the majority of a wheel's weight comes from the rim, not the dish. I think the alloys would still have an advantage here.

Quote:
Originally Posted by mayankk View Post
Steel wheels dont give options for a lot of design work, since you cannot have great big openings/holes in them.
Just doesnt support as rigidly as an alloy.
The steel wheels that Sankar posted clearly have big openings in them:



Note that unlike a typical stamped (and fairly flat) steel wheel, the spokes on these are a lot more dimensional. This ads rigidity. For example, take a piece of card paper, fold it down the middle, and see how much "stronger" it gets when compared to a flat sheet :

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cya
R

Last edited by Rehaan : 13th June 2012 at 12:37.
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Old 13th June 2012, 16:56   #24
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Default

Quote:
Originally Posted by Rehaan



The steel wheels that Sankar posted clearly have big openings in them:

Note that unlike a typical stamped (and fairly flat) steel wheel, the spokes on these are a lot more dimensional. This ads rigidity. For example, take a piece of card paper, fold it down the middle, and see how much "stronger" it gets when compared to a flat sheet :

cya
R
This is different steel, and wheels from this material cost as much ,if not more , than alloys.
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Old 13th June 2012, 17:13   #25
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Default Re: Structure Wheels - Steelies that look like alloys!

Alloys are harder and handle impacts better than regular steel wheels.
Hence, IMO, these steelies need to have the adequate amount of material (steel) to match the stress handling properties of alloys, which will have much..much lesser amount of material and also weighs less. So, in comparison, these steelies will become heavier, and costlier than regular steel wheels. So, weight should be the prime disadvantage.

For example, the Tavera wheels, are heavier than normal steel wheels. Not sure, but I guess its the same case with Pajero.

But, these steelie rims will be more rugged and withstand hard impacts . So, you see these wheels only on SUV's or vehicles used for rugged purposes. Not city hatches, where efficiency and production cost matters.

Also, if cheap steeleis are made, on the long run, the fatigue faced by rust and shear stress in the dish of a wheel is very concerning, and it will cause this:

Structure Wheels - Steelies that look like alloys!-img_1844-copy.jpg

Shown above is a Hyundai Accent, which while doing ~50kmph, had its wheel dish crack, separating the tyre.. The vehicle landed @~50kmph on its brake dics.

The above vehicle had regular OE rims. IMO, with less heavy and fancy steelies, this would happen much earlier.


Quote:
Originally Posted by GTO View Post
Here's my post from the Chevrolet Beat Review thread:
GTO, if you look closely, these wheels have the ~same amount of material like regular steel wheels. This is just some sensible design. But, to have bigger holes in the design, which of course is needed for looks, the rims need to be really heavy. This is not desired in a city hatch.

Last edited by dhanushs : 13th June 2012 at 17:14.
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Old 13th June 2012, 18:13   #26
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Default Re: Structure Wheels - Steelies that look like alloys!

Quote:
Press Release

The wheel for the new Vectra
* New ‘Structure' wheel puts kerb on damage costs
* All the looks of an alloy but costs less than £16 to replace
* Fitted as standard on new Vectra Exclusiv
It's a sound which every driver dreads..... Just as you are trying to park neatly or squeeze past traffic on a tight urban street there is a sickening graunch as your expensive alloys meet the kerbstone.

If the damage isn't too severe, owners might get away with getting the wheel refurbished by a specialist and a bill for around £60. Anything more severe will mean the whole wheel will have to be replaced, and the cost is likely to be at least three figures. Wheelcovers are much easier and cheaper to replace of course, but all style-conscious drivers lust after the sleek looks of alloy wheels.

Now Vauxhall has come up with the perfect answer - the Structure wheel. Fitted as standard to the new Vectra Exclusiv, it looks - even to the trained eye - like an attractive alloy wheel. In fact it is an innovative five-spoke steel wheel covered with an easy-to-replace plastic wheel cover. If it's damaged, a replacement cover costs less than £16 including VAT, so all four wheeltrims can be replaced for less than the cost of refurbishing one alloy wheel!

As the cover is also held in place by the wheel's bolts, theft is far more difficult than with a conventional wheeltrim, and it's virtually impossible for it to fly off when the car is in motion.

Vauxhall's experts were also determined that the new wheel shouldn't harm the new Vectra's driving dynamics, so the entire Structure wheel assembly, including the cover, is only marginally heavier than the equivalent 16-inch alloy wheel.

It's just another example of how Vauxhall is using its expertise to keep running costs low for its customers. In fact, it looks like Vauxhall could have created a real ‘revolution' in wheel design!

Source: General Motors Corporation
Source: http://www.worldcarfans.com/10508318...ts-wheelcovers



Quote:
Originally Posted by dhanushs View Post
Shown above is a Hyundai Accent, which while doing ~50kmph, had its wheel dish crack, separating the tyre.. The vehicle landed @~50kmph on its brake dics.
Do you have other pics of this incident? I would like to see how and from where it broke apart. Welding failure?

Last edited by Sankar : 13th June 2012 at 18:22.
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Old 15th June 2012, 13:53   #27
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Default Re: Structure Wheels - Steelies that look like alloys!

Hi Guys

One more structured wheel's picture from my side. This was taken from the internet too.

I guess that structured wheels are more of a "VA-VAE" activity carried out on regular production steel rims. As discussed earlier, this could pose a threat for wheel rim strength but on the brighter side, it also cools the brakes pretty quickly thereby preventing instop fade resulting in poor braking.

Anybody from Wheels India on the forum can comment on the "structured wheels" much better.

Cheers
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Old 16th June 2012, 10:34   #28
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Default Re: Structure Wheels - Steelies that look like alloys!

These wheels will be a reality in India soon. They are being tested on various models by one of our clients, and one of the largest steel wheel manufacturers in India. It takes a super trained eye to realise that theyre not alloy wheels.
The availibility of better material for outer rim construction has made it possible for the insides to be made like spokes. The only disadvantage they have over alloy wheels is weight. But they are much much cheaper than similar alloy wheels.
And they look Fantastic! Honestly!
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Old 16th June 2012, 22:58   #29
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Default Re: Structure Wheels - Steelies that look like alloys!

Some of the new launches in the coming months will sport these wheel rims.

Both Wheels India and Steel Strips have these in their portfolio. A major Chennai based Auto OEM which is due to launch a much awaited semi-SUV will have such 16" steel wheel rims for its mid - variant.

I got to get a look of these a few days back and they look awesome.
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Old 17th June 2012, 16:49   #30
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Default Re: Structure Wheels - Steelies that look like alloys!

Thanks a lot satya180 & RideTechie -- your posts have added a whole new dimension to this thread. Glad that we'll be seeing them soon!

I wonder if the prices of (real) alloy wheels will take a drop after these are introduced? I guess that would only happen after the steel structures wheels become widely adopted by several manufacturers!

cya
R

PS - Also hope they offer multiple wheel-cap styles!
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