Tech Update: TPMS
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12-27-2006, 11:51 AM
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Tech Update: TPMS
This will start affecting people when they swap wheels, so I figure we should start spreading the word.
An Update on Tire Pressure Monitoring Systems and Aftermarket Wheels
A direct tire pressure monitoring systems (TPMS) will be standard equipment on every vehicle sold in the U.S. after September, 2007. The criteria for TPMS standardization is that the vehicle must have only four wheels (no dual-wheeled trucks or motorcycles), and weigh less than 10,000 lbs. Chrysler and Dodge are keeping up with the new TPMS law. Many of the cars and vans already have direct TPMS (see TPMS facts below), as do the 2007 SUVs, but the pickup trucks do not have the option yet. Chrysler and Dodge currently use several sensors from Siemens and Schrader. The Tire Rack carries all sensors for vehicles up to the 2007 model year. The size of the sensor shouldn’t be a problem for many wheels, but if the valve hole is in the middle of the wheel’s barrel, the sensor will not fit properly. Wheel manufacturers are aware of the issue and are rushing to get most of their wheels TPMS-compatible. The Tire Rack's fitment specialists have carefully determined which wheels that are currently available will be compatible with the system installed on your vehicle.
If you have any questions about the wheel you're considering, call or post your question for confirmation that it will be compatible with your TPMS.
TPMS Facts : Direct TPMS use a sensor in the wheel/tire to wirelessly relay pressure back to the driver via a display inside the vehicle. Some vehicles have a digital screen that continuously shows all four tire pressures (five if spare has sensor). Others simply flash a "low tire pressure" light on the dash. Additionally, there are two different styles of sensors for a direct system: a valve sensor and a strap/band sensor. Only valve sensors are used on Chrysler/Dodge direct system-equipped vehicles. If you bought an aftermarket SmarTire TPMS, its sensors are held on by a strap around the barrel of the wheel.
Indirect systems work in conjunction with the ABS wheel speed sensors that “count” the number of revolutions of each tire. If the right front tire is low (25psi) it will spin faster than the left front tire (35psi). The ABS system will recognize this change and alert the driver with a flashing light and possibly a loud chime. Although no current model Chrysler or Dodge has an indirect TPMS, it is helpful to understand this important difference -- indirect systems do not affect the fitment of aftermarket wheels.
An Update on Tire Pressure Monitoring Systems and Aftermarket Wheels
A direct tire pressure monitoring systems (TPMS) will be standard equipment on every vehicle sold in the U.S. after September, 2007. The criteria for TPMS standardization is that the vehicle must have only four wheels (no dual-wheeled trucks or motorcycles), and weigh less than 10,000 lbs. Chrysler and Dodge are keeping up with the new TPMS law. Many of the cars and vans already have direct TPMS (see TPMS facts below), as do the 2007 SUVs, but the pickup trucks do not have the option yet. Chrysler and Dodge currently use several sensors from Siemens and Schrader. The Tire Rack carries all sensors for vehicles up to the 2007 model year. The size of the sensor shouldn’t be a problem for many wheels, but if the valve hole is in the middle of the wheel’s barrel, the sensor will not fit properly. Wheel manufacturers are aware of the issue and are rushing to get most of their wheels TPMS-compatible. The Tire Rack's fitment specialists have carefully determined which wheels that are currently available will be compatible with the system installed on your vehicle.
If you have any questions about the wheel you're considering, call or post your question for confirmation that it will be compatible with your TPMS.
TPMS Facts : Direct TPMS use a sensor in the wheel/tire to wirelessly relay pressure back to the driver via a display inside the vehicle. Some vehicles have a digital screen that continuously shows all four tire pressures (five if spare has sensor). Others simply flash a "low tire pressure" light on the dash. Additionally, there are two different styles of sensors for a direct system: a valve sensor and a strap/band sensor. Only valve sensors are used on Chrysler/Dodge direct system-equipped vehicles. If you bought an aftermarket SmarTire TPMS, its sensors are held on by a strap around the barrel of the wheel.
Indirect systems work in conjunction with the ABS wheel speed sensors that “count” the number of revolutions of each tire. If the right front tire is low (25psi) it will spin faster than the left front tire (35psi). The ABS system will recognize this change and alert the driver with a flashing light and possibly a loud chime. Although no current model Chrysler or Dodge has an indirect TPMS, it is helpful to understand this important difference -- indirect systems do not affect the fitment of aftermarket wheels.
