doing the cheap way or ghetto way rather than buying a SS-specific crankset. What I want to do is remove the big ring (42t?) and replace it with a bash guard. I rarely use the small and big ring, mainly the middle, so I will be using the middle ring for this conversion. Small ring will stay since I can't remove it. I plan to keep the 8-speed cassette in the rear for a 1 x 8 set up.

Question is what bash guard size do I use? What's the BCD on this crankset? It has 5 bolts holding the big ring. Will the Girvin Rock Ring work on this crankset? I often see them on Ebay. BBG bash guards are usually readily available, so I might use that. But what size to get?

Btw, anyone have done this to the crankset? SS conversion?