UKKid35

Which bush tends to wear more, inner or outer, or both the same?

Reason I ask is that I only have two new bushes, and I bought them when they were far less expensive than they are now

FredR

I did not make any effort to determine the answer to the query you raise - given action and reaction are equal and opposite my expectation is that both ends will likely experience similar levels of permanent deformation. Careful measurement might give you an answer.