I've had a n Interline gauge for 2 years. Last race without warning, it showed air pressure @ 15 lbs, when it was really @ 6 lbs. I sent back to Interline to be repaired or replaced. Was told 90 day warranty. All they did to repair was bend the copper spring in the gauge and sent it back, stating yes there's a chance it could malfunction again. 90 day warranty is just WRONG for a product that's so critical to racing performance.