The PressurePro FX 2 TPMS for RVs and Trailers # 372FX2K is the only two tire TPMS monitoring system we carry. We do also have the TireMinder i10 TPMS for RVs and Trailers w/ Signal Booster # TM89FR which is a 4 tire sensor system and can read tire pressures up to 199 PSI. view full answer...