u/Flaky-Ad-8235

I'm looking for ideas to replace the drive train on my Bike Friday NWT. It's older and very well used when I bought it on CL. It did the trick for a couple of short weekend trips to have to tool around on. Now, it's becoming pretty much my main ride due to it's foldability and I like the ride. The rear wheel has a 3 speed internal hub for 7 speed cassette. Rear spacing is 135 mm. I'm thinking of just replacing the wheel and going with a 1X setup since the STI shifters are pretty bad. Any ideas?