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Cost Savings Guide

Inflation Tips

Field testing of Yokohama truck/bus tires has determined the following:

  • Steering ease, stability and overall vehicle handling is enhanced by setting the steer axle pressures up to an additional +10 psi over the minimum drive axle tire inflation and at or above the pressures required by the tire load on the steer tire.

  • Trailer tires should be set at pressures corresponding to actual tire loading. An additional 10 psi cold inflation is recommended to compensate for pressure loss between airing for all tire positions.

  • Under no circumstances should a Yokohama tire be inflated lower than the lowest pressure on the chart for a given tire size and ply rating.

  • On 6x4 tractors, field and laboratory testing has proven that irregular wear on drive-axle tires is minimized by maintaining the inflation pressures prescribed in the following tables.

    Learn By Example

    The following example gives you a working model for the guidelines set forth above.

    Example: Recommendation for an 80,000 lbs GVW operation Vehicle: 6x4 tractor, 48 foot long box trailer

    Trailer Example


    		• The High Price of (Under) Inflation


    		Inflation Tips / Learn By Example


    		Yokohama Tire Corporation Recommended Cold Inflation Pressures


    		Alignment / Toe


    		Tracking / Camber / Caster


    		Kingpin Inclination (KPI) / Alignment Tips



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