First and foremost, TPC produces a conservative (safe) cold tire inflation pressure for plus-sizing.  For the original tire size on the vehicle, the vehicle placard gives the recommended inflation pressure for the front and rear tires on the vehicle.  When fitting plus-size wheels and tires, the seller needs to provide the same recommendations.  One method of doing this is to inflate the tires to the maximum pressure shown on the tire sidewall.  This usually results in a harsh ride, fast center wear on the tires, and unhappy customers.  Another method is to look up the tire load capacity at various pressures in the tire fitment guide provided by the tire maker.  This approach requires that you compute the inflation pressure from the vehicle loads given on the vehicle placard and the values in the tire load table.  This also assumes that you remember to include appropriate safety factors like, for example, the 10% margin required when using a passenger car tire on a light truck.  How well-trained are your employees in doing these calculations?   Using TPC eliminates the need for tire pressure tables, includes all the required and recommended safety factors, and prevents calculation errors in the process.  

 

You save time:  time collecting tire makers' load tables, time keeping up with standards in the industry, and time double checking your work.  TPC will tell you if the tire selected is too small for the vehicle in question.  TPC provides a correct inflation pressure, and you provide your customer a professional plus-sizing job.

 

TPC also computes the minimum and maximum wheel widths that can be used on the tire size selected.  This means that you do not have to look up this information in the tire maker's fitment guide.  Also, the wheel width range provides clear information to show your customer in cases where the wheel they have chosen is not available in a width necessary for the tire they want to use. 

 

TPC also computes the speedometer change that the customer is likely to see with the new wheels and tires.  This is shown as a table of actual speed versus indicated speed.  If this offset is larger than desired, then the customer should be sent to the vehicle dealer so that the speedometer can be adjusted in the vehicle's computer system.

 

Finally,TPC prints a record of the tire size change, the expected speedometer offset, and the wheel width range for the new tires.  This record may be given to the customer as a summary of the work that was done.  TPC also will, with the addition of a low cost label printer available at office supply stores,  print a Supplemental Tire Pressure Label that can be affixed to the vehicle adjacent to the original vehicle placard.  With this label in place, the customer always has the information needed when checking the air pressure in the plus-size tires.  TPC also can print the required Weight Information label necessary when the vehicle is being sold at retail for the first time.

 

TPC also allows you to save a record of the tire fitment in the computer.  This is helpful, for example, if the customer has inadvertently marred one of the Labels, and you need to print another one.  This is also helpful should any questions arise about how you arrived at the inflation pressure you recommended