Today I got my "essential tool kit" from Nashbar, and easily removed my Octolink
crank and Shimano BB ES-25 bottom bracket, 68 x 118
My goal was actually to see how it was all put together and clean it up a bit,
anyway, I was noticing the screw in retainer piece on the left side, is made of Plastic,
like everything else in our lives these days.

Is this gonna last for a while? Or would I be better to replace the entire BB with
Something better?
This is for a Raleigh Talus 29

Last Question, What is a suitable substitute for mild Trail riding, With out plastic?
is there such a thing?

Thanks

Dave