BST Carbon or Marchesini Forged?? - Page 4 - BMW S1000RR Forums: BMW Sportbike Forum
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Old 11-21-2012, 04:25 PM   #31 (permalink)
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Default recieved my Marchesini Genesi Forged AL

I recieved my Marchesini Genesi Forged AL
Front = 8.4lbs
Rear without sprocket carrier - 10.6
Sprocket carrier = 2lbs
Sprocket = 1.6lbs(superlite steel)
Rear with sprocket carrier = 12.6
Total rear with sprocket carrier and sprocket = 14.2


So BST(based on Samsons pic) rear is 9.3 without sprocket carrier, Marchs Al rear is 10.6 without sprocket carrier.
BST fronts is 6.1 vs Marchs front 8.4.

As you see BST is always benchmark - cant beat that. BST's may never fail for you individually - BUT then there is probability. I envy you BST guys, but just not for me...
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Old 11-23-2012, 04:33 PM   #32 (permalink)
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Quote:
Originally Posted by varunrajg View Post
I recieved my Marchesini Genesi Forged AL
Front = 8.4lbs
Rear without sprocket carrier - 10.6
Sprocket carrier = 2lbs
Sprocket = 1.6lbs(superlite steel)
Rear with sprocket carrier = 12.6
Total rear with sprocket carrier and sprocket = 14.2


So BST(based on Samsons pic) rear is 9.3 without sprocket carrier, Marchs Al rear is 10.6 without sprocket carrier.
BST fronts is 6.1 vs Marchs front 8.4.

As you see BST is always benchmark - cant beat that. BST's may never fail for you individually - BUT then there is probability. I envy you BST guys, but just not for me...
Here is where a lot of people are missing the point.

What matters is how much of the overall weight of the wheel is in the rim versus the hub. Almost all of the carbon fiber wheel weight is in the hub, very little weight in the outer rim where it really matters because carbon is so light.

Most of the BST sprocket carrier is machined into the hub itself, so measuring the weight of the BST carrier versus Marche carrier is not actually measuring apples versus apples either.

If you could cut the rims off of both wheels and throw them on the scale side by side, the difference would be dramatic.

Enjoy your wheels!!! That trully matters.
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Old 11-23-2012, 07:07 PM   #33 (permalink)
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I had the carbon BST's.


Pulled my first wheelie (not used to the front being what? 3k lighter than stock?) and flipped it, first thought was the wheels. Picked the bike up to find this.

Still holding air, just a scuff on the rim ( but the more you touched it the more the layers picked away)



Those wheels were no more, 2500 down the drain after 24 hours, your call.
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Old 11-24-2012, 01:26 AM   #34 (permalink)
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Can anyone confirm weight on carrozzera's?
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Old 11-24-2012, 07:00 AM   #35 (permalink)
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Has anyone used/considered MFR wheels? (Marchesini's new company).

I saw these at a bike show and they looked stunning. (in black)



MFW Wheels
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Old 11-24-2012, 07:13 AM   #36 (permalink)
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Quote:
Originally Posted by Godzilla View Post
Has anyone used/considered MFR wheels? (Marchesini's new company).

I saw these at a bike show and they looked stunning. (in black)



MFW Wheels
According to their site, the black ones (magnesium) are $6,000+.
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Old 11-24-2012, 07:18 AM   #37 (permalink)
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Originally Posted by 9mmkungfu View Post
According to their site, the black ones (magnesium) are $6,000+.

MFR Wheels

2100 on that site.
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Old 11-24-2012, 06:56 PM   #38 (permalink)
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Quote:
Originally Posted by 1hotlimo View Post
Can anyone confirm weight on carrozzera's?
I weighed what came off and what went on when I switch to Carrozeria's. Keep in mind you need a new sprocket and I went with a steel sprocket. you could save more with an aluminum sprocket but I did not want the decreased wear in aluminum on a 193HP motorcycle. I lost 2.2 pounds in the front and 2.8 pounds in the rear. I also used the same tires so it was a straight up swap.
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Old 11-24-2012, 08:11 PM   #39 (permalink)
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Quote:
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Just a word of caution on carbon fibre. It's fine for stuff like body panels but on stressed components like wheels it does age and weaken. I looked at CF in aerospace design some years ago to strengthen some mechanical components but under examination it gradually develops micro cracking and softens in stressed applications.

Racers using carbon wheels don't keep them forever. So I'd always go for forged metal if you're expecting 10 years + life from them.


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I'm going to have to kind of disagree...I work as an engineer for a certain American defense contractor that made a certain black airplane and the CF components were under tremendous stress and worked near flawlessly for more than 10 years....having said that I haven't seen any engineering mean time to failure tests on BST wheels so have no comment...other than they look badass and the weight savings are other worldly for handling I have to imagine.
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Old 11-24-2012, 08:55 PM   #40 (permalink)
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^^^ so, is there a difference between military grade CF and commercial CF.
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