Your on the TST thread. Four years with 507's only issue was inside duals and extensions. Just eliminated the extensions, personally completed by Mike Benson of TST at IRV2 rally, all is well and accurate within a couple PSI on bus and tow.
Clay & Pebble.. Miss Butter our sweet Goldie (Jan. 2005-Jan. 2015) Sissy our Border Collie
2012 Providence 42 M. Spartan Chassis, 450 ISL
Ford Edge toad, RM All Terrane, TST TPMS, SMI Air Force One, RVM95....