When checking a tyre sidewall, you may come across the marking EMT and wonder what it means — and whether it’s different from Run-On-Flat tyres. The key thing to understand is this:

EMT is Goodyear’s specific marking used to identify its run-flat tyre technology.
Other tyre manufacturers use different markings for their own run-flat versions.

What Does EMT Mean?

EMT stands for Extended Mobility Technology.

This is Goodyear’s proprietary marking used on tyres that are designed to continue operating after a loss of air pressure. Functionally, EMT tyres are run-flat tyres (ROF) , engineered to allow controlled driving for a limited distance after a puncture.

Is EMT Different from Run-On-Flat Tyres?

No — EMT is not a different technology.

• Run-On-Flat is the general tyre category
• EMT is Goodyear’s name and sidewall marking for its run-flat design

The performance principle remains the same:

• Reinforced sidewalls support the vehicle without air
• The driver can continue driving temporarily to reach a safe location or service centre

Why Do Manufacturers Use Different Markings?

There is no single universal marking for run-flat tyres across the industry. Each manufacturer uses its own terminology to identify similar technology:

• Goodyear: EMT (Extended Mobility Technology)
• Bridgestone: RFT / Run-Flat Technology
• Michelin: ZP (Zero Pressure)
• Pirelli: Run Flat / RF
• Continental: SSR (Self-Supporting Runflat)

Despite the different labels, the core function is the same — extended mobility after air loss.

How Goodyear EMT Tyres Work

Goodyear EMT tyres use:

• Reinforced sidewall construction to support vehicle weight after deflation
• Heat-resistant compounds to manage friction during temporary run-flat operation
• Controlled speed and distance limits, typically up to 80 km (50 miles) at reduced speeds

This allows drivers to avoid immediate roadside tyre changes, improving safety and convenience.