Has anyone else seen these? Im a big fan of carbon fiber, but rolling on it? They look nice, and dont seem expensive, but something just doesnt seem right.....

http://cgi.ebay.com/ebaymotors/17-SCION-TC-ELEMENT-240-RSX-MAXIMA-CARBON-FIBER-Wheels_W0QQcmdZViewItemQQcategoryZ43957QQitemZ8027344470QQrdZ1

they look nice but i don't know if you notice that the bolt pattern doesn't fit the tC. Our bolt pattern is 5x100. but they're probably cheaply made and will probably bend easily. just my .02

CF-finished - not CF rims. CF rims would cost a boat load o' ca$h!
I think the bolt pattern is wrong too.
Look nice, but they may be cheezy.

Scott

$268.

Hellooo, yes something is wrong. Really really wrong.

yeah, i saw those the other day too... looks fishy for sure.

they look nice but i don't know if you notice that the bolt pattern doesn't fit the tC. Our bolt pattern is 5x100. but they're probably cheaply made and will probably bend easily. just my .02

#1 carbon fiber doesnt bend, thats just part of its properties, well ok the really thin sheets do but thats it. It will simply crack or explode when too much pressure is applied but never bend.

#2 as already said, it says carbon fiber finish. that means anything from a regular wheel rapped in carbon, plastic cover, or just a paint scheme. By the looks of the wheel its one of the last two.

sure carbon rim sounds like an awsome idea, but to actually make such a rim and have it be perfect from wheel to wheel without imperfections would be EXtremely difficult due to the complicated bends wedges and shapes that come into making car wheels. Alot of material would be neccesary in their construction, and even more hours of super dooooper expertly trained hand workers making a price of $10,000 EASY for 4 true carbon rims.

first of all that is really cheap for those rims, they are made by o1 design system which for some reason their domain is for sale. they did sell for like 1400 for a set of 18's i almost got some but they were out of my price range. still looks kinda fishy

first of all that is really cheap for those rims, they are made by o1 design system which for some reason their domain is for sale. they did sell for like 1400 for a set of 18's i almost got some but they were out of my price range. still looks kinda fishy

maybe for for a rim very simple in design, but still $1400 not gonna happen. If any of you know the price for a carbon fiber tritatholon bike frame ($3000 for a frame not even a bike EEZYYY)and you'll know what im talking about. Imagine the price for a single mesh style wheel that is more complicated.

these arent real cf, but cf design (i emailed the guy - it is legit though, and in my area (roseville ca)

but 288.63 out the door (picked up) aint bad for wheels if someone needed em
http://vsrwheels.com/Wheels/Armano/Gt5/Carbon/DSC04248.JPG

listen i know what im talking about, they are just wrapped in carbon, not made of, they are a racing hart knock off cast alum. with a wrap of carbon fiber.

first of all that is really cheap for those rims, they are made by o1 design system which for some reason their domain is for sale. they did sell for like 1400 for a set of 18's i almost got some but they were out of my price range. still looks kinda fishy

maybe for for a rim very simple in design, but still $1400 not gonna happen. If any of you know the price for a carbon fiber tritatholon bike frame ($3000 for a frame not even a bike EEZYYY)and you'll know what im talking about. Imagine the price for a single mesh style wheel that is more complicated.

there was a post somewhere here with REAL CF rims....they were $450 a piece or somethign ridiculous like that....

$450 is still cheap for real CF rims.

I don't know anyone personally with Cf design or real Cf rims, but i have talked to someone online about his on his rx-7. He paid $1,350 a peice for 18'' CF. They weighed in around 2lbs a peice.

$450 is still cheap for real CF rims.

I don't know anyone personally with Cf design or real Cf rims, but i have talked to someone online about his on his rx-7. He paid $1,350 a peice for 18'' CF. They weighed in around 2lbs a peice.


wow 2lbs each that must have mad a world of diffrance on the car well worth the cash for a race car


i wounder why i never see any race cars with them

$450 is still cheap for real CF rims.

I don't know anyone personally with Cf design or real Cf rims, but i have talked to someone online about his on his rx-7. He paid $1,350 a peice for 18'' CF. They weighed in around 2lbs a peice.


wow 2lbs each that must have mad a world of diffrance on the car well worth the cash for a race car


i wounder why i never see any race cars with them

Extremely rare, and actual race cars already put more than enough whp and power to weight to not worry about how heavy the wheels are to an extent.

Moto racers do use them, and they're way expensive. Lightness on bike rims makes more of a difference than for cars - I've seen them and you gotta have serious cash.
They are beautiful though...

Scott

carbon fiber wheels? :rofl: they would probably brake

carbon fiber wheels? :rofl: they would probably brake

They mix a compound in with the wheel when making it to allow durability and saftey.

carbon fiber wheels? :rofl: they would probably brake

It's BREAK, and they are made for racing, not demolition derby's...

Scott

carbon fiber wheels? :rofl: they would probably brake

It's BREAK, and they are made for racing, not demolition derby's...

Scott

:rofl:

carbon fiber wheels? :rofl: they would probably brake

It's BREAK, and they are made for racing, not demolition derby's...

Scott

:rofl:

ill drop one in to


:rofl:

I'm sorry but a CF rim would weigh more than 2 lbs. Just look at how much a hood weighs. There is ALOT more CF needed in a rim than in a hood. Your friend with the RX7 "CF" rims is full of poo.

Your first mistake was when you said i have talked to someone online about his on his rx-7.
Yeah talk to me online and I'll tell you about my Saleen S7 TT that I use as my daily driver and my very own personal Milennium Falcon that I use for longer trips... :rofl:

I'm sorry but a CF rim would weigh more than 2 lbs. Just look at how much a hood weighs. There is ALOT more CF needed in a rim than in a hood. Your friend with the RX7 "CF" rims is full of poo.

Your first mistake was when you said i have talked to someone online about his on his rx-7.
Yeah talk to me online and I'll tell you about my Saleen S7 TT that I use as my daily driver and my very own personal Milennium Falcon that I use for longer trips... :rofl:


speaking of the s7 lol have you noticed all the cf in thoughs?? there is a big car deal for saleen and lambos in naperville ill and the s7 they have has cf headlight housings and every body panel is cf its crazy

I'm sorry but a CF rim would weigh more than 2 lbs. Just look at how much a hood weighs. There is ALOT more CF needed in a rim than in a hood. Your friend with the RX7 "CF" rims is full of poo.

Your first mistake was when you said i have talked to someone online about his on his rx-7.
Yeah talk to me online and I'll tell you about my Saleen S7 TT that I use as my daily driver and my very own personal Milennium Falcon that I use for longer trips... :rofl:

Usually, yes you are right. But when someone provides not only pictures of his rx-7, pictures of him working on it, friend in another car taking a few of him driving, and also a picture of the rim on a scale showing "2.3lbs", you typically go ahead a believe them. Sure, he could be lying and just found a bunch of online pictures, but whoever's rx-7 that was the rims were weighed at 2.3 according to scale. (per rim)

Speaking of CF hoods, mine weighs 10.

If anything it was kg, not lbs. There is no way an 18 inch rim could weigh 2.3lbs and hold any weight.
You spin a piece of metal fast enough and you can cut it with a piece of paper or a human hair.

Oh and on the slim chance that the scale did say 2.3 lbs ever hear of photoshop? Just from an engineering standpoint its too improbable to have a rim weigh 2.3 lbs, be 18 inches, carbon fiber and only cost $1400 per rim.
As it was said earlier, bikes that are made of CF cost $3000 and they use less CF than a rim would need. (oh and those bikes with just the frame weigh more than 2lbs)

DUDE.. THERE IS NO SUCH THING AS A 2LB CF WHEEL.. LIKE IT OR NOT.

I doubt there is a true CF wheel. The torque would probably snap the splines on the rim. CF doesnt last long when its twisted or torqued...

^^^ Wrongo!
Black Stone (http://www.hardracing.com/Rims/BlackStone.htm)
DyMag (http://www.webbikeworld.com/motorcycle-wheels/carbon-fiber-motorcycle-wheels/)
Lovely! (http://www.ram.mc/wheels/BST/gallery/BSTgallery.htm)

Scott

^^^ Wrongo!
Black Stone (http://www.hardracing.com/Rims/BlackStone.htm)
DyMag (http://www.webbikeworld.com/motorcycle-wheels/carbon-fiber-motorcycle-wheels/)
[url=http://www.ram.mc/wheels/BST/gallery/BSTgallery.htm[Lovely![/url]

Scott

Heh, ok ok you got me, but I wasnt specific enough.

Moving a motorcycle is alot less stress than moving a 2000+ lb vehicle. 200 ft/lbs tq moving 500lbs is alot less than 200 ft/lbs tq moving 2000+ lb. The weight difference would make a huge impact on the life of a CF rim.

Anyways just to make a point even more pronounced those wheels all cost at the cheapest around $2500

And thats for less material needed for a bike rim, not a vehicle rim!

If anything it was kg, not lbs. There is no way an 18 inch rim could weigh 2.3lbs and hold any weight.
You spin a piece of metal fast enough and you can cut it with a piece of paper or a human hair.

Oh and on the slim chance that the scale did say 2.3 lbs ever hear of photoshop? Just from an engineering standpoint its too improbable to have a rim weigh 2.3 lbs, be 18 inches, carbon fiber and only cost $1400 per rim.
As it was said earlier, bikes that are made of CF cost $3000 and they use less CF than a rim would need. (oh and those bikes with just the frame weigh more than 2lbs)

I'm just stating what i saw, if you guys want to argue about it with someone take it up with someone else other than me. I know photoshop, i used to design websites for people with dreamweaver as well as numerous other things.

^ ^
Point to that was it wasn't altered imaging. It could have been 2.3kg, but i'm assuming it was lbs since the guy lives here in the states. Of course, again, assuming these pictures are truly his and didn't just pick random google or yahoo images.

And it is possible to get these rims for $1,350 with a half sponsorship deal, or knowing someone in the business. Of course, i dont know if he did or does or not. I didn't talk to him that long to find out every detail.

oh and about twisting forces. how come they make cf driveshafts then? that's a lot of twisting right there.

oh and about twisting forces. how come they make cf driveshafts then? that's a lot of twisting right there.

Exactly.

Cf blended with the right compound can be extremely sturdy and handle a ton of pressure/twists/whatever.

x2 - some people here talk 'bout ____e they know nothin' about. It's better to ask and learn than to stick foot too far into mouth!!!

SCOTT

Which is part in reason why i asked to see proof of the rims weighing so light. If i can contact him again, i will ask if those pictures were in 2.3kg or 2.3lbs. I do realize how light those are, i'm not making "ignorant" assumptions, i'm just providing past down information sort of speak. So as i stated before, don't yell at me for incorrect information if it happens to be incorrect, these are not my rims nor will they be.

CF drive shafts?

It's the direction of the twisting.

For a drive shaft, the twisting would occur parralel to the weave whereas on rims, the twisting would occur perpendicular to the weave.

Also, with a drive shaft, all of the torsion is applied in a tight area instead of on a wheel where the torsion is multiplied by 18". Add to that, the amount of work required to move 3000 lbs of car 100 ft - you got some serious leverage and torque being applied to not so strong parts of a wheel.

All of that torque would then be centered on the very ends of the drive shaft but those ends are reinforced with non CF parts anyways.

I think.

the driveshaft experiences more torque than the wheel.

Of course it does.

However, the torque applied to the drive shaft is in the same direction of the weave of the CF.

On a wheel, the weave would be experiencing torsion in two forms - torque from the drive shaft and torque from the ground. The friction required to get the car moving becomes a retarding torque applied to a relatively narrow and weak pillar or CF.

Consider a bike wheel. I'm not talking about a motorcycle, I'm talking about a bicycle. The brakes on a bicycle are really weak - if you apply full brake pressure you can still pretty easily push the bike. Now, if you go really fast and then brake only the front brake you'll flip over. If the brakes are weak than why would you flip over? Torque. The longer the distance from the center a force is applied to a circular moving object, the greater the force is multiplied.

This is the same concept - I don't even know if it applies properly. I don't know the very nature of CF.. CF can be stronger than steel - I do know that.

its actually the opposit of that concept. All of the torque would be at the center of the wheel, but maybe thats what you were talking about. Oh and you can make the weave go any direction u'd like.

What you can't do is make the weave go in two directions.

It's probably incorrect to say that the drive shaft experiences more torsion.. it'd be more correct to say it experiences a greater torsion. The wheel actually experiences two different forces. One force comes from the drive shaft while the other one comes from the ground.

EDIT: I think the point of my argument may have been skewed slightly. I was just explaining how it would be possible that CF wheels break - not that they WILL break. If you look at the design of the CF wheel above, you'll see that each spoke reinforces the next one and that the spokes are somewhat diagonal of what you'd - in the direction opposite of the torque that will be applied via the the engine. This design eliminates the weakness of single directional weave. I'd imagine, though, that if the wheel were designed in a conventional 5 spoke star design, the potential for breakage will be greater.

bingo, anything can break. Just have to have the right design.