Airless TIREs or Non-pneumatic TIREs (NPT) , are TIREs that are not supported by air pressure.

1. AIRLESS TIRE
Presented BY
Jayant N Sarode(14MCD0017)
VIT UNIVERSITY VELLORE
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2. CONTENTS
 What is a pneumatic tire and its drawbacks
 What is an airless tire?
 How it works?
 Different design approaches
 Advantages and disadvantages
 Applications
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3. PNEUMATIC TIRES
 A pneumatic, or air-filled, tire is
made of an air tight inner core
filled with pressurized air.
 The pressure of the air inside the
tire is greater than atmospheric
air pressure.
 Cushioning Effect
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4. DRAWBACKS
 Puncture or Blowout.
 A blowout at high speeds can lead
to a dangerous car accident.
 Variations in air
pressure changes tire performance.
 Can blow out by gunfire or
explosion.
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5. Introduction
 The Tweel Airless Tire was first developed in 2005
by Michelin.
 The Tweel name is a combination of the words tyre
and wheel.
 Tweel's hub connects to flexible polyurethane
spokes which are used to support an outer rim.
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6. WHAT IS AIRLESS TIRE?
 Airless TIREs or
Non-pneumatic
TIREs (NPT) ,
are TIREs that
are not
supported by air
pressure.
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7. AIRLESS TIRE
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8. HOW IT WORKS?
The flexible tread and
shear bands deform
temporarily as the spokes
bend, then quickly go
back to the initial shape.
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Deformation of tire when it get through the
obstacle

10. DESIGN APPROACH
NASA’S Apollo
Lunar Rover
Michelin
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11. continued..
Bridgestone
Resilient
Technologies,
LLC
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12. ADVANTAGES
 Eliminates air leaks or TIRE blow outs.
 No maintenance required.
 Facilitate recycling.
 Remains mobile even with some of the spokes are damaged
or missing.
 Durability & Long Life.
 Can take gunfire or explosion.
 Less environmental impact.
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13. DISADVANTAGES
 Lack of adjustability.
 Vibration.
 Different Manufacturing technique.
 Not as economic as pneumatic TIREs.
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14. APPLICATIONS
Used on some small vehicles
such as riding lawn
mowers and
motorized golf carts.
In backhoe or bulldozers.
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15. APPLICATIONS
For Military vehicles
All Terrine Vehicles (ATV)
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16. Futuristic Design
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Hankook i-Flex
Aims to keep losses to minimum
95% manufacturing is recyclable

17. CONCLUSION
 No improvements are made in TIREs nowadays.
 Manufacturers have started to focus making
airless TIREs.
 Challenge is to make it more feasible and
economical.
 When done, Airless TIREs are the future TIREs.
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