Rim Weight

[AzzurrA]

Hi All

Before you say "Do a search", i have, and couldn't find anything even remotely close to what i'm about to ask

First Question:

Does anyone know the weight of a standard R33 GTS-t / S14 Rim? (16 x 6.5) (Rim Only) or have one laying around that they could weigh or something please?

Second Question:

I'm looking to upgrade my rims to some 17" ones, and have been looking around for something that i like, and have come across these ones from 'Ozzy Tyres'... i'm just wondering if anyone has had any experience with this company/ their rims?

they are:

Ozzy Racing - RS GT

17 x 7

They told me they weigh in at around 6kg each, which isn't too bad for $220/rim

[danh]

ozzy are a pain in the proverbial.

they have a nice selection of wheels though.

[AzzurrA]

bump... anyone else?

[Beer Baron]

the 17inch rims you are looking at are $220 each. forged japanese quality wheels are around $900 each. that should tell some of the story. on a heavy car like a GTR i would be a bit concerned about using cheap chinese cast wheels.

[ed]

the 17inch rims you are looking at are $220 each. forged japanese quality wheels are around $900 each. that should tell some of the story. on a heavy car like a GTR i would be a bit concerned about using cheap chinese cast wheels.

<{POST_SNAPBACK}>

I got my 17x8.5 and 17x9.5 Jap wheels new for $1500/set after agent fee (from Yahoo Auctions), delivery, customs duty and tax.

Auction price was a tad under 70,000 yen. (~$900AUD = $225AUD each wheel)

They are Semi-Solid Forged wheels that were made by SSR and rebadged and sold under a different name.

$900/wheel is a bit extreme for 17's? nismo's?

[Beer Baron]

semi-forged? you could say then that they are semi-cast. that is not the same as a forged TE37 or LMGT4 or CE28N etc etc. have a look at how much these cost. sounds a bit suss mate, made by SSR but sold as no-name? and anyway they didn't cost you $225 a rim did they? they cost you $350 a rim. i'm not saying all cast rims are shit, but just that a $200 rim from ozzy tyres doesn't instill any great confidence in me. i may be a sceptic though.

[Sydneykid]

Forged rims are harder and lighter but more brittle. This means it takes more to bend them, but they are more likely to crack. Cast wheels are softer and heavier, but not as brittle. They are more likely to bend than crack.

Simplistically, there are 2 types of cast alloy wheels, the more common is gravity cast. This means the molten alloy is simply poured into the mould using gravity ot fill the mould. The less common type is pressure cast, that means the molten alloy is forced into the mould under pressure. Pressure cast alloy wheels are a half way between forged and gravity cast. They are not as brittle as forged and yet stronger and lighter than gravity cast.

Bottom line, forged wheels are not always better, it depends on the application. Then there is the budget consideration, judged as a purely performance upgrade, forged wheels are simply not good value for money.

Back onto the main subject of this thread, wheel weight. Personally I find it very frustrating that the wheels manufactures don't publish the weight of the wheels. You can easily find the diameter, the width, the offset, the colours, the stud pattern etc etc . But finding out the weight can be almost impossible, many times even the manufactuers don't know how much the wheels weigh.

So every time I go into a wheel shop now I ask, how much do those wheels weigh? Even if I am not interested in buying them. I figure if I ask enough times they might get the hint that's its important to the buyers and publish them.

If we all do it, it will happen faster.

cheers

Edited September 12, 2005 by Sydneykid

[Beer Baron]

Bottom line, forged wheels are not always better, it depends on the application.  Then there is the budget consideration, judged as a purely performance upgrade, forged wheels are simply not good value for money.

cheers

<{POST_SNAPBACK}>

agreed, but they make you feel like you are cool

don't tell me you wouldn't have a set of nice TE37s or LMGT4s Gary...

[Sydneykid]

agreed, but they make you feel like you are cool

don't tell me you wouldn't have a set of nice TE37s or LMGT4s Gary...

<{POST_SNAPBACK}>

No I wouldn't, because some idiot would run into them on the race car, that's wheel to wheel racing . Or some crook would steel the tow car just for the rims . Plus I can spend the $2K on something that will make the race car go faster than what saving a handfull of kgs with forged rims will.

cheers

[ed]

semi-forged? you could say then that they are semi-cast.  that is not the same as a forged TE37 or LMGT4 or CE28N etc etc. have a look at how much these cost. sounds a bit suss mate, made by SSR but sold as no-name? and anyway they didn't cost you $225 a rim did they? they cost you $350 a rim. i'm not saying all cast rims are shit, but just that a $200 rim from ozzy tyres doesn't instill any great confidence in me. i may be a sceptic though.

<{POST_SNAPBACK}>

Fair enough about being skeptical.

It's called Semi-Solid Forging.

SSR have been using it on a few of their wheels for awhile.

http://www.tirerack.com/wheels/ssr/ssr.jsp

No they didn't cost me $225/rim but if you imported a whole container load. You'd most likely get a discount I'd say. ?

I've attached a pic of the sticker that was on the wheels if you thought I was lying.

[siksII]

bump... anyone else?

<{POST_SNAPBACK}>

hey mate,

6kg per 17" cast wheel is VERY light

if a wheel is cast generally speaking the heavier the stronger. so bottom line those rims being cast and light would not be strong, and will probably buckle easily

a typical cast 5 spoke design wheel 17x7 weighs about 8.5kg

a typical forged 17x7 weighs about 6.5kg.

so i find it VERY hard to believe that the wheels u are looking at are in fact 6kg and if they are i would stay away

tell them to put it on a scale and i bet u they weigh more anyway.

and for the record, SSR rims are strong rims and a good compromise between the two processes read the website or google it.

i have attached a pdf with lots of wheel weights for your info. (the values look correct to me)

wheel_weight_alpha.pdf

[Beer Baron]

No I wouldn't, because some idiot would run into them on the race  car, that's wheel to wheel racing .  Or some crook would steel the tow car just for the rims .  Plus I can spend the $2K on something that will make the race car go faster than what saving a handfull of kgs with forged rims will.

cheers

<{POST_SNAPBACK}>

ok ok, then what would/do you use on the race car then?

[my_gtr32]

Hey, out of curiosity, I just weighed a Nissan R33 gtr factory wheel I have. It weighs around 9.5Kg, and that's a 17 x 9 inch forged wheel. If a pressure cast rim is only 6.5Kg then it must be very thin or weigh more than advertised.

hey mate,

6kg per 17" cast wheel is VERY light

if a wheel is cast generally speaking the heavier the stronger. so bottom line those rims being cast and light would not be strong, and will probably buckle easily

a typical cast 5 spoke design wheel 17x7 weighs about 8.5kg

a typical forged 17x7 weighs about 6.5kg.

so i find it VERY hard to believe that the wheels u are looking at are in fact 6kg and if they are i would stay away

tell them to put it on a scale and i bet u they weigh more anyway.

and for the record, SSR rims are strong rims and a good compromise between the two processes read the website or google it.

i have attached a pdf with lots of wheel weights for your info. (the values look correct to me)

<{POST_SNAPBACK}>

[AzzurrA]

i'm guessing the guy picked a random number out of the air to shut me up... as the conversations is as follows (cut & paste):

Me: "Hi, I was just wondering if you could tell me how much one of these rims weighs [referring to RS-GT], and what offsets are available? Also, do you have a 'rough' RRP for them?

Ozzy Tyres: "What size r u after ??"

Me: "sorry mate... 17 x 8,

5 x 114.3"

Ozzy Tyres: "17” 4 weeks away

18” avail in shadow chrome $2000 incl tyres

If you want the 17” place your order to guarantee

availability"

Me: "How much for just the 17" rims only?

what about 17" rims with tyres... what sort of price are they?

and also, what tyres do you guys use?

and any idea on the weights?"

Ozzy Tyres: "$220 per wheels

$1500 incl tyres

Tyres low profile to match the car

6kg"

Now, not only did the guy take half a dozen emails to answer a few simple questions, he sounds like he's all of about 10 years old with his fullee siik speak, bro, and still didn't answer half of my questions!

[Duncan]

On a race car? Speedy holotype R $200 each in 17x8 nice and strong. Not particularly light, and they look dead ugly

For targa we run the Weds they are heavier but also nice and strong, neither we nor the just jap guys have buckled one in a heap of targas between them. Like Gary said they crack instead

[dangerous_daveo]

So what difference does a lighter rim make? As 99.9% of us wont be wheel to wheel racing as most of our cars are road cars, with maybe a bit of track work every 3months.

More so, as its rotating mass, does it make a difference. Just interested to know, my rims arent going anywhere no matter what. Just good to learn.

[ed]

Coming from ROH's to the Final Speeds.

Acceleration seemed better and response a bit better, esp in low RPM ranges.

[saliya]

On a race car? Speedy holotype R $200 each in 17x8 nice and strong.  Not particularly light, and they look dead ugly

Duncan,

I run these on my road car, one developed a crack right through one of the spokes.

Sent the wheel back to Speedy, they replaced it. Apparently, it's pretty unusual

(a) for a spoke to crack without bashing the wheel into something

(B) for a wheel maker to replace a broken wheel 'just like that'

(it means they've accepted that there was something wrong with the wheel originally).

I think this was just 'bad luck' (the wheels are still on the car). For those that aren't

racing (and not checking the wheels every time), it's worth the trouble to start

doing it

Regards,

Saliya

[Sydneykid]

On a race car? Speedy holotype R $200 each in 17x8 nice and strong.  Not particularly light, and they look dead ugly

They look ugly to you because you only see them from the rear. :lol:

If they were in your rear vison mirror they would probably look OK then.

cheers

[predator]

Don't know whether this helps, but I just weighed a standard R32 gts-t rim + tyre I have here and its 18kg. I'd assume that this would have to be similar to R33 unless its a different material.

Guess you'd have to work out much a tyre+air weighs.

Are there any formulas to work out the weight of air in a tyre at say xx PSI ? Must be I'd imagine...