Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 2 Post(s)
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IMO, there's no reason to spend more than necessary for OEM quality wheels. If a pair (upper and lower) is a bargain compared to each separately go ahead and buy the pair, and either replace the lower or hold the new one back until needed.
RD pulleys are low load parts with very little loss to bearing friction. Even the simplest bronze bushing models are so close in performance to the most expensive ceramic bearing versions, that there's no way to justify an upgrade other than cool factor.
An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions”
- Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance