Originally Posted by
JanMM
From other posts about this newly-acquired Sun EZ Speedster AX, OP has shared that there may be a problem with the RD hanger. From other pics of this Sun model, it can be seen that an idler is used that places the power side chain (upper) under the idler and the return side chain (lower) over the idler. It's a dual idler, according to the pics.
I can't tell what's going on with this bike: more pics needed, especially from the drive side, from the crankset to the rear wheel.
I've included a couple more pics to help you visualize the drive line. I do have the power chain under the idler pulley and the return chain on top of the idler pulley. Dual idler would be correct. Derailleur hanger/bracket is actually fine. The cage bolted up to if just fine too. When you view the return chain pic, see how it is rubbing hard against the chain stay. There are no scratches or rub points on the stay now so I doubt I have it right. Allowed to rub, it surely would wear right through the stay itself.bi understand cross chaining, but I'm on the middle ring up front and in the middle of the cassette. This bike had been ridden just before I acquired it. So I've mis assembled it somehow.
