Hello. So we purchased a new Shasta Oasis 25rs in January 2016. The tires are 205 75 14 load range c. Constancy tires. (no doubt made in China) We drove it to Seattle and back to Salt Lake City approx...
If you purchase a TPMS, definitely replace the rubber valve stems with all metal. I just went thru this last summer. The weight of the TPMS caps will break the rubber valve stems right at their base. The metal(brass) stems with rubber base won't cut it either. They need to be the all-metal bolt in type like these at Amazon.com