I've been using bashrings on my SS bikes for a few reasons:
- Strength: some have managed to bend the spider and chainring with Shimano 4 bolt cranks. The bash should add some strength there, just like a big ring.
- Chainring bolts: I can use regular ones, not shorter.
I suppose it is not really necessary for log crossings and such. Not sure if rock contact is worse for the chain than tree contact.
some cheap bash the LBS happened to have, actually undersize with the 36T ring:
This came with the cranks: