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Frequently Asked Questions - Michelin Pax System
Tire Tech Tips :: Michelin-Pax System :: Get the FAQ's


Frequently Asked Questions - Michelin Pax System

Q: What is PAX System?

A: PAX System is an innovative tire and wheel assembly consisting of four components: tire, support ring, wheel, and tire pressure monitoring system. It is a breakthrough run-flat technology designed to, first, help keep you safe by offering you added protection from the dangers of a blowout and changing a tire on the road, and second, make driving more convenient by lessening the hassles and delays of a flat tire. The most fundamental difference between PAX System and traditional tire and wheel assemblies is that a PAX System tire is designed to not separate from the rim, even with the occurrence of a sudden flat at high speed under normal driving conditions. The inner support ring also offers exceptional maneuverability and control in the event of a blowout. And, should a flat occur, PAX System allows for the vehicle to be driven up to 125 miles at 55 mph.

Q: How will a driver know if there is a flat with PAX System?

A: Direct measurement tire pressure monitoring systems (TPMS) measure the temperature and pressure of each tire at regular intervals. The sensors transfer information to an electronic control unit that warns a driver in real time via a dashboard display of any pressure loss in each tire.

Q: How far can a PAX System-equipped vehicle be driven with a flat?

A: PAX System is designed to allow a vehicle, under normal operating conditions, to be driven safely with a flat tire up to 125 miles at speeds no higher than 55 mph. Driving within those parameters should allow the tire to be repaired and returned to service.

Q: Can consumers replace PAX System with another tire-wheel assembly if they desire?

A: PAX System-equipped vehicles are specifically designed and tuned to feature PAX System, so it is not recommended to replace PAX System with another tire-wheel assembly. In fact, such a change may void the vehicle's warranty, even if the tire-wheel assembly is only substituted for a short time.

Q: What type of treadwear can a driver expect with PAX System tires?

A: PAX System tires should provide treadlife comparable to a corresponding traditional Michelin tire.

Q: Are there PAX System winter tires?

A: Yes, PAX System winter sizes are available for PAX-equipped vehicles.

Q: Where are the Michelin PAX System assemblies manufactured?

A: PAX System is a tire-and-wheel system, and different components are manufactured by different companies. PAX System wheels are produced by Hitachi, Topy, and others. PAX System tires are manufactured by Michelin, while the support ring is supplied to Michelin by Dow Automotive. Michelin assembles the components for each system at its facilities.

Q: How long has PAX System been on the market?

A: Michelin PAX System was introduced in 1998 as a completely new approach to the challenge of continued mobility.

Q: How many PAX System assemblies have been sold?

A: Over 200,000 PAX System assemblies have been sold in Europe and North America.

Q: Which cars have Michelin PAX System on them?

A: There are five total production vehicles that feature Michelin PAX System, including the 2005 Honda Odyssey (Touring model.) Other production vehicles with PAX System are:

  • Renault Scenic models in Europe -- introduced in February 2002
  • Audi A8 in Europe -- introduced in November 2002
  • Rolls Royce Phantom -- introduced in January 2003
  • Audi A4 in Europe -- introduced in September 2004
  • Honda Odyssey -- introduced in September 2004

Q: How is Michelin educating drivers about PAX System?

A: Michelin is providing vehicle manufacturers with a comprehensive package of information describing the operation, features, and benefits of PAX System.

Q: What does PAX stand for?

A: It actually started in 1997 as PAV, a technical abbreviation describing this new, vertically anchored tire. With a traditional tire, inflation pressure helps hold the tire to the rim. The innovative anchoring mechanism of PAX System is designed to not separate from the rim and actually improves its hold when vertical loads are applied to the tire. By 1998, PAV was renamed PAX System, which translates to the values of peace of mind, safety, and the future. When it comes to safety, PAX System is way ahead of traditional tire and wheel assemblies. The most fundamental difference between the two is that a PAX System tire is designed to not separate from the rim, even with the occurrence of a sudden flat at high speeds under normal driving conditions. And, should a flat occur, PAX System allows for the vehicle to be driven up to 125 miles at 55 mph, which means you're less likely to be stranded on the side of the road.

Q: How is PAX System different from conventional run-flat tires?

A: Conventional run-flat tires compromise ride quality because they rely on a low profile and stiff sidewalls to shoulder the load when air pressure is lost. Thanks to the support ring, PAX System can adopt a low profile - which is ideal for excellent handling - while maintaining more flexible sidewalls; this is the key to a comfortable ride under normal driving conditions.

Q: How is PAX System more environmentally friendly than a traditional tire and wheel system?

A: Placing importance on creating environmentally responsible products has always been a priority at Michelin. PAX System is no exception. PAX System tires:

  • Offer a superior level of fuel economy, thanks to reduced rolling resistance
  • Provide excellent tread wear for longer life
  • Are repairable if punctured in the tread area and have a reusable support ring
  • Eliminate the need for a spare tire

Q: Is there a significant weight penalty with PAX System?

A: Weights will vary depending on model and depending on size of wheel and tire. In general, four PAX System assemblies are equal to the weight of 4.7 standard tire-wheel assemblies. PAX System eliminates the need for a spare tire and/or wheel, which makes the overall weight of PAX System assemblies virtually equal to that of standard tire/wheel assemblies.


Q: What should a driver do if s/he gets a flat?

A: The driver should maintain control of the vehicle and reduce speed to 55 mph or lower. PAX System allows for the vehicle to be driven up to 125 miles at 55 mph. As soon as possible, the driver should stop the vehicle in a safe place and inspect the tire. Once it is confirmed that there is a flat, the driver should call us.

Q: What determines where to send a driver with a flat for assistance?

A: These recommendations are based upon a number of factors and handled individually. The consumer is usually sent to the closest service point - either a Michelin-authorized tire servicing dealer or a car dealer who replaces PAX System assemblies. But with each call, the objective is to achieve the highest possible level of consumer satisfaction.

Q: How do car dealers service PAX System?

A: Car dealers normally only replace complete PAX System units, meaning they will take a flat tire-wheel assembly off and put a new PAX System on a vehicle. In some cases, the vehicle dealer may also be an authorized PAX System servicing location and will be able to perform repairs or replacements. For complete information on what constitutes a warranty replacement, please see the warranty for details. Furthermore, please see the following question to address when a consumer is responsible for purchasing an entire PAX System assembly versus simply replacing the tire.

Q: Should a consumer ever be expected to pay for an entire new PAX System assembly?

A: Under the PAX System Assurance Plan, all road hazards are covered for the first two (2) years or 50% of treadlife. The tire and support ring will be replaced at no charge to the consumer. If there is damage to the wheel due to a traffic accident or vandalism, then the consumer will be responsible for purchasing the new wheel and, therefore, replace the full assembly. The Tire Pressure Monitoring System is not covered under the PAX System Assurance Plan and is subject to the conditions specified in the vehicle warranty.

Q: Can a car dealer perform a simple puncture repair on a PAX System tire?

A: The repair of Michelin PAX System requires special mounting equipment, replacement parts and technical training. Any intervention or repair on the Michelin PAX System tire or assembly (other than an ordinary air pressure check and correction) needs to be referred to a Michelin PAX System authorized servicing dealer. The use of cord plugs and/or sealants in attempting to repair a Michelin PAX System tire will immediately void the warranty and may result in internal parts malfunction.

Q: Where can a driver of a PAX System-equipped vehicle get a flat fixed?

A: Consumers can either have their PAX System replaced at a car dealer who sells PAX System-equipped vehicles or repaired at Michelin-authorized servicing dealers. There are approximately 200 Michelin-authorized servicing dealers nationwide with the appropriate PAX System-capable mounting/demounting equipment. Pit Crew Tire is a Michelin-authorized servicing dealer who is able to service PAX System tires.

Q: What happens if a driver with a flat can't get to a car or Michelin authorized servicing dealer?

A: When a consumer calls Pit Crew Tire, we can further instruct you.

Q: Do I need to replace the entire wheel each time I need new tires?

A: No. PAX System tires that are worn out are replaced just like traditional tires. However, these tires should only be replaced at a Michelin-authorized servicing dealer with the appropriate PAX System-capable mounting/demounting equipment.

Q: Does the support ring have to be replaced each time a tire is driven with zero pressure or when a tire is replaced?

A: No, the support ring is designed to be used in several run-flat events. It can be returned to service after being inspected for wear or damage once the tire is repaired or replaced. Should it need to be replaced during the first two years or 50% of tread life, it will be replaced at no charge, if damaged or worn due to a road hazard.

Q: Do roadside service vendors like AAA know what to do if they are asked to service PAX System?

A: Michelin is currently working with AAA and others to make sure they understand how to handle PAX System in the field. Pit Crew Tire is a state of the art mobile tire service that is authorized by Michelin to help you.

Q: What happens if a roadside assistance crew uses a sealant with PAX System and then re-inflates the tire?

A: It is not recommended to use a sealant with PAX System. It also voids the warranty of PAX System. Call Pit Crew Tire - we can help you!

Q: Where does a driver go to have PAX System tire pressure monitoring system serviced?

A: Drivers should locate a car dealer in the U.S. who sells PAX System-equipped vehicles. Consumers can call 1-877-PAX-TIRE to find the car dealer nearest them.


Q: What's covered under the warranty?

A: PAX System is covered by the Michelin tire limited warranty and a special Michelin PAX System Assurance Plan (see warranty for complete details). The warranty covers defects in workmanship and materials for the life of the usable tread up to six years. The Assurance Plan covers road hazard damage at no charge to the consumer, including mounting and balancing, during the first two years or 50 percent of tread wear, whichever occurs first. After the free replacement period, the tire will be replaced on a pro-rata basis according to the amount of tread used.

Q: When would a driver have to purchase a replacement PAX System tire?

A: There are several situations in which the Michelin limited warranty or Michelin PAX System Assurance Plan would not cover replacement costs. When:

  • the tread wears out through normal use
  • the tread wears out prematurely due to improper wheel alignment
  • a tire is damaged through vandalism
  • a tire or wheel is damaged in a traffic accident




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