You are reading a single comment by @getoutofbed and its replies.
Click here to read the full conversation.
-
The purpose is to reduce friction around the jockeys. A larger cog provides less friction as the chain does not have to rotate along such a tight curve. And the bearings in a OSPW are usually ceramic adding to this effect.
Less friction = easier pedalling
See this article about the Trek Segafredo team using bigger rings to counter the effect of the small Sram AXS cassettes:
https://cyclingtips.com/2020/01/bigger-chainrings-for-trek-segafredo-but-not-for-the-usual-reasons/
getoutofbed
Netakure
e54
That said, whats the (technical?) purpose of such jockey wheels except decreasing the beauty of a bike, if any?