Not machining quality related but, with my tire business, we have a calibrated check station to check customers tire gages. We usually see about 2 PSI off but last year we saw two gages that were reading 12 PSI high! That is huge when most pressure changes (due to wear and rider input) are 1 PSI. Pressure adjustments on my personal bike are about .5 PSI and, yes, I can tell the difference when riding.
Not machining quality related but, with my tire business, we have a calibrated check station to check customers tire gages. We usually see about 2 PSI off but last year we saw two gages that were reading 12 PSI high! That is huge when most pressure changes (due to wear and rider input) are 1 PSI. Pressure adjustments on my personal bike are about .5 PSI and, yes, I can tell the difference when riding.
