I recently purchased a Helix 19% pulley/belt from a guy here, but I'm having second thoughts about going straight to 19% on an unmodded car.
Looking to trade the outer ring and belt for a 15% outer ring. Straight across, each covers their own shipping.

Anyone interested?

 

Or...
Maybe trade complete for a different brand 15% pulley?

I'm open to options.

 

I don't think you'll have a problem with the 19%. I started with the 15%, then bought the 19% without the hub from Helix. The 19% is more fun, since the engine pulls harder at low rpm. Once the stock pulley is off, you can switch back and forth pretty quickly (no need to jack up the engine). So, if the 19% causes any problems, you can always buy a 15% and sell your 19% at that point. I've never had a single problem with either pulley, though.

 

Wow. Good info there. I did not know that the swap of outer rings was that easy. I guess my main concern is that with a 160 mile/day commute, I would be wishing I owned Chevron stock. Yeah, I know, if mpg is that high a priority, why pulley at all?
Fun, pure and simple. If all I wanted was mpg, I would have bought a Prius.

 

Well, I don't mean to trivialize the job of switching pulley sizes too much. The first time you do it, count on 1.5-2 hours unless you work on cars a lot. Not hard to do, but time consuming and also you'll need a tool to remove the belt tension (available from several NAM vendors). Once you have this, you can change the belt regularly, which is a good idea. But really, there's not enough of a difference between the 15% and 19% to stress over choosing one vs.the other.