I'm fairly new to this, so I realize this may sound like a dumb question.

I've been riding a Wabi Lightning with stock parts for about a year. While I've been pleased with it, I don't have much experience on other bikes to make a comparison. I want to start upgrading my components but I'm not sure where to start. What are some go-to parts that people like to replace first (and that make a difference in ride quality)? For example, when buying a computer, the processor and RAM are often the first things that get upgraded and provide the most dramatic improvements. What's the bike equivalent to that?

I use my bike to commute in NYC (lots of stop and go traffic), if that's pertinent information.

Here's a list of the stock components I currently have on my Lightning (I have the older 2011 version, but I think this list is the same): http://www.wabicycles.com/Component-...g-LSE2011.html

Thanks in advance.