|Anyone have info about Carmichael Der. pully's??||James|
Mar 28, 2002 2:11 PM
|They sell them at Nashbar, but i cant seem to find any info. A friend ordered them for his Dura Ace der., but they wont shift right. There just isnt enough float in the pully. Any one try these or have any info? Nashbar cant seem to get any info on them??|
|re: Anyone have info about Carmichael Der. pully's??||Quack|
Mar 28, 2002 2:33 PM
|I have used them successfully on a 7spd mountain setup and have only had one seize up due to water penetration/old age in 9 years. Basically just a machined aluminum pulley with a sealed bearing pressed in the middle and spacers to fit the cage. In my opinion, I would not buy them as replacements for any derailleur that already has sealed/semi-sealed pulleys such as Dura-Ace or XTR. Great marketing though. I believe they claim to reduce drag so much that if you climb 10,000 feet, it will really only feel like 9,950.
I would be interested to know how much drag you can actually feel through a set of 170-175mm cranks pushing a poorly lubricated 20mm radius pulley. When one of mine seized up, the only reason I knew it was bad was because it was squealing due to the inner race spinning on the spacers. I didn't actually feel anything. One positive note is that Carmichael shipped a new pulley to my house free of charge no questions asked.
|re: Anyone have info about Carmichael Der. pully's??||JimP|
Mar 28, 2002 3:14 PM
|I have been using Carmichael pullies for over 15 years on different DuraAce setups. The current pully for 9 speed DA is the larger, 11 tooth pully. The shifting of these pullies is much more precise but you have to have your cable adjusted more closely. The current Shimano DA pully is OK but the shifting feels slow compared to the Carmichael.|
Mar 28, 2002 6:16 PM
|Ah yes, the promise that they will make you faster..... |
Shimano patented the floating pulley in the rear der. - everyone else is left trying to figure a way around it. You don't need them and they won't work any better than what came with your bike. How about this for thought: I've never had a Shimano pulley fail or sieze and they always shift correctly. When the pulley binds up it's due to stuff on the outside - not the inside of the pulley - what kind of bearings you have inside matters not.
|Somebody called them "bike jewelry"||retro|
Mar 29, 2002 9:20 AM
|Somebody called ALL aftermarket pulleys "bike jewelry," and I'm inclined to agree. I'm sure you could show how a tiny reduction in friction translates into a 20-foot lead at the end of a century or something (in fact it's been done, I just don't remember the numbers). But it's like titanium chainring bolts: Too much money for something I can't feel.|
|The general rap is negative.||Kerry Irons|
Mar 28, 2002 8:04 PM
|While some have used them successfully, the consensus is that aftermarket derailleur pulleys at best are a high priced alternative to the real thing, and in many cases are not up to the job done by the OEM pulleys. Carmichael is specifically mentioned as "not worth the cash."|
|re: Anyone have info about Carmichael Der. pully's??||Ironbutt|
Mar 29, 2002 6:48 PM
|I bought a pair of them a couple of years ago to replace the worn originals on a Shimano 105SC derailleur. The pulleys themselves were nicely machined, although it is a royal pain to clean road spooge out of the holes around the periphery. The bearings are of good quality, although I suspect that the claims for less friction are a bit on the optomistic side. The insert that is supposed to allow the top pulley to float is made of such soft alumnium that when the screw is tightened fully the insert deforms and does not allow the pulley to float. I wound up machining a new insert from a grade 5 stainless steel bolt and after installing the homemade part the shifting worked well. Actually, almost as well as the stock Shimano parts.|| |