|bearings in wheels...why does my campy run farther||john de|
Mar 29, 2001 2:46 PM
|my older campy records 99 run much longer than my 3 month old kyseriums ..if i get the kyseriums to go any longer they are loose...i can feel the campy roll but not the other..is it just the new grease in the kyseriums....does it matter...i have it set to roll as best as possible without any looseness ...this seems the best to me, is it...|
|couple of possibilities||Retro|
Mar 29, 2001 3:06 PM
|If by "roll," you mean keep going longer when you spin them, there are a couple of possibilities, or three or four.
One is rim weight. You're probably spinning them the same way, and a heavier rim, once it's going, will keep going longer than a light one.
Another is wear. If the campys have some miles on them, they may have worn in so the parts all love each other and work smoothly together.
A third is lubricant. The Ksyriums may have more, or a thicker grease, that could slow them down faster.
And finally there's quality: Campy hubs are usually very well made, carefully machined and work great. I suspect one of these, or some combination, is what's going on.
|thanks you all for responding...but does it matter||john de|
Mar 29, 2001 7:18 PM
|so if my kyseriums are quicker to stop free rolling does it matter..|
|does it matter||fuzzybunnies|
Mar 29, 2001 7:51 PM
|If the campy hubs roll longer it's cause somewhere in the krysiums there's more friction. More friction is always bad though how bad is based on the amount. You may never notice the extra friction in which case it might not matter that much, you simply may be loseing the benefit of the aerodynamics of the wheel. All depends on how much friction there is and how fast they stop rolling. TTFN|
|re: bearings in wheels...why does my campy run farther||nkao|
Mar 29, 2001 6:51 PM
|I too have campy 99 record hubs and chris kings. Maybe its my imagination, but my bike coasts further and faster compared to the kings. I think I even climb faster. I also have dura-ace built wheels, and they also coast faster than the kings.|
|My Ksyriums seem to have a little friction, too.||bill|
Mar 30, 2001 6:37 AM
|When I posted this same question a couple of months ago, I got the interesting response that maybe it's because of a plastic sleeve Ksyriums have introduced instead of, I forget instead of what, but it had to do with the bearing race in the rear freehub. The thought was that the sleeve may break in. It's really not noticeable.|
|what can you expect for a mere 800 bucks?||DaveG|
Mar 30, 2001 8:37 AM
|Its a matter of severity. I doubt its enough to make any tangible difference. If you are handy with physics, I'm sure you could actually calculate the drag knowing the mass, imparting a known velocity and measuring the time to stop. However, any deltas in air drag could throw a monkey wrench in that.|
|what can you expect for a mere 800 bucks?||john de|
Mar 30, 2001 12:16 PM
|im going to aviod the calculations and just ride more...its too late i already bought them..if they get better maybe ill tell the board...they are faster wheels then the old, im just nit picking|| |