Originally Posted by jeff williams
1'ST.-I lost the middle ring ramp position ( compared to the arm position ) It's a shimano sg c-46, This prob won't matter as I'm not running a dérailleur, but I'd like to know for my instruction as to reassembly ( marked it w\ pencil and greased it off..darn! ).
There's often some sort of marking stamped on the chainring to indicate alignment with the arms. Shimano often uses a little triangle. And the big ring often has a pin on the outside to prevent the chain from jamming between the ring and the arm should you shift off the outside - this would indicate alignment for that ring.
Originally Posted by jeff williams
2'ND.- I am running mostly mid ring 36 t, I will buy a higher toothed wheel for my single- am on the light metal, ramped mid ring- Is it safe to use this way?
I've never run multi-speed with a single chainring. But I would think you would want a ring designed for single-speed use. A ramped and profiled ring is designed to shift and you might have problems with the chain derailing.
Originally Posted by jeff williams
3'RD.- can I use a chain ring intended for 6 speed? ( have a nice solid 36 t, no ramp, but is intended 6 rear ) is this a chain width or tooth spacing compatibility issue?
Yes. 6/7/8 speed all use basically the same width chain.