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Descending with carbon rims

Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Descending with carbon rims

Old 03-27-07, 09:32 PM
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jdgreen
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Descending with carbon rims

Are carbon rims safe for mountain rides where the intended descent speeds are to be kept in the 35 to 40 mph range at the most and probably will require a fair amount of bumping the brakes to do so? They would be matched up with the carbon pads by Zipp. The rims are Zipp 303 tubulars.
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Old 03-27-07, 09:50 PM
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No, they'll explode... CATASTROPHICALLY!

In other words, they're fine.
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Old 03-27-07, 11:06 PM
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See: CSC Cycling Team.

That really is all you need to know about descending on Zipp wheels.
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Old 03-27-07, 11:07 PM
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well that ends that debate ^^
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Old 03-27-07, 11:08 PM
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Carbon wheels + hills = dead pandas and global warming
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Old 03-27-07, 11:08 PM
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Which carbon fiber Zipp wheels is the CSC team running this season?
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Old 03-27-07, 11:10 PM
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Every time you descent on carbon rims god kills a kitten. Help control pet population!
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Old 03-27-07, 11:32 PM
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I'm waiting for white carbon wheels.
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Old 03-27-07, 11:51 PM
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i have carbon wheels (Look 3.8) , but i only use them for climbing. i carry a spare set of ksyriums for descending.

huh?
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Old 03-28-07, 12:46 AM
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Old 03-28-07, 03:01 AM
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it's not the wheels, it's your handling of said wheels
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Old 03-28-07, 03:50 AM
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Originally Posted by cuski
Rofl
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Old 03-28-07, 05:38 AM
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Originally Posted by Blue Jays
Which carbon fiber Zipp wheels is the CSC team running this season?
Any ones they want when they want them.
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Old 03-28-07, 07:26 AM
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the issue, as with any tubular, is the effect of the heat on the glue and rolling the tire.

According to Zipp, their pads are excellent at dissipating heat.

However, there is some concern about how well tubulars glue to CF rims. ( See Joseba Beloki.) Given the widespread use of CF tubular rims, its obviously not an insurmountable problem. I'd just make sure the tires are glued on properly, and then you should be fine.
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Old 03-31-07, 12:53 PM
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I live in flats and have no real descending experience. I am going to do a ride in the mountians and expect to have to stay on the brakes some due to my inexperience. This would lead to some heat, therefore the question referencing carbon wheels with tubular tires. I obviously was not clear enough in my question to this bunch of distinguished and accomplished riders, therefore resulting in a bunch of smart ass answers. I obviously will not be descending at pro level speeds "CSC comment" and will need more brakes. Thanks Merlinextralight for one thoughtfull response.
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Old 03-31-07, 01:12 PM
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Originally Posted by Blue Jays
Which carbon fiber Zipp wheels is the CSC team running this season?
Mostly the 303 and 404, sometimes as a 343 set. This will vary in events such as the TT where they will usually go with the 999, and in mountain stages where they'll rock a 202 on occasion.
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