My Thorn Raven has a steel chainring cover outboard of the (38t) ring itself - this came as standard in 2007 (and 100,000+ miles ago) when I bought the bike. If I want to fit the Chainglider I'll have to remove this covering ring so that the chain (only) fits inside (as I understand it). But the present 5 chainring bolts are too long without the cover ring and won't tighten, so it seems I need a new set of 5 smaller bolts. Does anyone have an idea of the spec / size of bolt needed for this? There seems to be a large array of possibilities.
