I've got a slightly bent spider. I say "slightly", but if I put a 50t chainring on it the chain hops off. A 38t works, but I don't have any 20% hills near me.
I assume to get a new spider I need to buy a whole new crankset. If so, is there anything specific to using an eccentric bottom bracket (EBB) to guide my choices? I have a Thorn Nomad 2 w/ Rohloff, EBB, and only a single chainring.
And, finally, I'm assuming it's the spider. I guess it's possible that the there's a problem in the BB, but then wouldn't the chainring rotate smoothly in a slightly off-kilter direction. Both (new) chainrings I put on show a wobble, w/ the 50t wobble being quite pronounced.
Depressed in Takoma (Park)