carbon fiber VS. magnesium racing wheels? - Sportbike Forum: Sportbike Motorcycle Forums
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post #1 of 24 (permalink) Old 11-27-2002, 06:39 AM Thread Starter
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Question carbon fiber VS. magnesium racing wheels?

I'm putting together a list of modifications for the new Honda 600RR I'm getting this Spring. One of the mods will be carbon fiber or magnesium racing wheels, but I'm not sure which one to go with. The question is, which is better???

I'm leaning toward the Marchesini wheels because of their reputation and selection. If somebody's got an opinion, information, or experience with carbon fiber and/or magnesium wheels please throw in your 2 cents!

Thanks.

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Last edited by slaintedan; 11-27-2002 at 11:31 AM.
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post #2 of 24 (permalink) Old 11-27-2002, 11:17 AM Thread Starter
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Here's a pic of the 5 spoke Marchesini carbon fiber wheel:

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post #3 of 24 (permalink) Old 11-27-2002, 11:39 AM Thread Starter
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Here's Marchesini's 10 spoke wheel:

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post #4 of 24 (permalink) Old 11-27-2002, 11:41 AM Thread Starter
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Here's a 5 spoke wheel made by BST:

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post #5 of 24 (permalink) Old 11-29-2002, 04:41 PM
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It depends on where the bike will be ridden...if there are alot of potholes I would stay away from full carbon rims. Carbon does not flex enough to take the hit of a pothole..and you will break them. There are a line of rims (not sure by who) that have carbon inners and aluminum outers, they bolt together. I would go for them...they look sweet and are light as hell. If it were my money, that is how I would do it, but just remember....carbon is pretty brittle, mag is a little less brittle, stockers are good....

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post #6 of 24 (permalink) Old 11-29-2002, 05:03 PM Thread Starter
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Quote:
Originally posted by Judge
It depends on where the bike will be ridden...if there are alot of potholes I would stay away from full carbon rims. Carbon does not flex enough to take the hit of a pothole..and you will break them. There are a line of rims (not sure by who) that have carbon inners and aluminum outers, they bolt together. I would go for them...they look sweet and are light as hell. If it were my money, that is how I would do it, but just remember....carbon is pretty brittle, mag is a little less brittle, stockers are good....

You hit it on the head. The condition of the roads on the east coast is my biggest concern. The potholes in New York can swallow a car whole!

On a scale of 1 to 10, 10 being the strength of a stock wheel, what would you rate a magnesium wheel and a carbon wheel?

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post #7 of 24 (permalink) Old 11-30-2002, 04:27 AM
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Carbon fibre is 50% lighter than Magnesium and 30% stronger. The advantage of the carbon rims is that they reduce the rotating mass of the wheel at the rim. The Magnesium wheels reduce the mass at the center by making the spokes really thin. Can you tell the difference? Probably not, but in theory if you can reduce the mass of the wheel at the rim it should improve handling. I have carbon rims and have had no issues in 16,000 miles of street riding. Although Florida doesn't have the truck swallowing potholes of New York City I have hit constuction realetd obstacles (how about a 4 inch high wall where they sawed out a section of highway for a new pipe) without damage, and my bike is a heavy machine. I have seen many of the stock alumimum wheels with dented rims or even chunks taken out from road hazards.

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post #8 of 24 (permalink) Old 12-02-2002, 06:25 AM Thread Starter
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Quote:
Originally posted by Blink
Carbon fibre is 50% lighter than Magnesium and 30% stronger. The advantage of the carbon rims is that they reduce the rotating mass of the wheel at the rim. The Magnesium wheels reduce the mass at the center by making the spokes really thin. Can you tell the difference? Probably not, but in theory if you can reduce the mass of the wheel at the rim it should improve handling. I have carbon rims and have had no issues in 16,000 miles of street riding. Although Florida doesn't have the truck swallowing potholes of New York City I have hit constuction realetd obstacles (how about a 4 inch high wall where they sawed out a section of highway for a new pipe) without damage, and my bike is a heavy machine. I have seen many of the stock alumimum wheels with dented rims or even chunks taken out from road hazards.
Blink,
Thanks for the great info. I've been a little concerned about the real-world strength of carbon fiber and didn't want to drop a couple grand into a pothole! I'm curious though, how fast were you going when you hit the 4" high "wall?"

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post #9 of 24 (permalink) Old 12-02-2002, 09:07 AM
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4 inch high wall?! Dammit that makes me mad! We motorcyclists pay the same damn registration tax as vehicles that actually wear down the roads (whereas we don't), and we don't even get enough consideration that they would warn us about shyt like that?! [email protected]@in' A! Well if carbon fibre survived that, that looks like the vote of confidence. Myself, if I had loads of money I would get those rims, but I can think of about a hundred other mods that would be more cost effective for me, before I'd do that. Just think, total öhlins suspension, just for instance!

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post #10 of 24 (permalink) Old 12-02-2002, 10:10 AM
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......, but I can think of about a hundred other mods that would be more cost effective for me, before I'd do that. Just think, total öhlins suspension, just for instance!



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