Sounds like your bike has a Tubliss installed based on a few points. My rim lock is 180° from the valve stem, 4 spokes away is how far the two valve stems are supposed to be with a Tubliss system. Also you're describing the Tubless valve stem/rim lock. The normal looking valve stem is for the small inner tube and I believe they are supposed to be like 110PSI. The bigger, odd looking valve stem is for the tire.
