crusoe wrote:That's what I'm thinking too. I'm running a 100mm BB and a 38t front chain ring. I'm also running an e13 srs chain guide (2004 model) that probably adds some mm's offset. There are also two black plastic spacers, between the BB cup and the BB itself (one on drive and one on non drive).
Is the ring going to rub on something if you offset it inward? You can use long chainring bolts and chainring/axle spacers to overhang the ring to the inside of the crank. I've done this before and it doesn't hurt anything.
Whatever front and rear gearing you have, the goal is usually to set it up so that the middle plane of the chainrings lines up with the middle plane of the sprocket stack. If you have odd numbers of rings or sprockets, then these middle planes correspond to actual sprockets, and if you have even numbers, they correspond to the central gap.
I just ordered a 42t front ring, so hopefully that will lift the chain, and in combination with that three speed freewheel, I'm hoping to solve the problem. It's a shame I haven't been able to find any 11t - XX type freewheels, because the 14tooth is pretty useless, as you've mentioned
Even 42t is pretty small for an assisted bike, though it would be OK as an inner ring of a double. Rings up to 56t are available without too much trouble or expense, in 110mm x 5 and 130mm x 5 bolt patterns at least. If you have a 56t ring, then using a 14t small sprocket still yields a pretty tall ratio.