Puncture Resistant tire
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Video of the validation tests :

Validation of the "SAFEKIT" (TM) concept :

Date of the tests : July 9, 2010

Step 1 : Installation of the kits and inflation of the tires,
Step 2 : Test of the perforation resistance,
Step 3 : 72 hours later, checking the pressure and visual inspection of the tires.

How the tests were carried out :

1) First step: A tube was inserted inside the 2 tested "tubeless" tires, inflated for about 10 to 15 min and then removed. The aim of this operation is to compress and tightly apply the adhesive seals against the internal sidewalls of the tires in order to obtain a perfect airtightness of the system in case of a perforation of the tread.

2) After the tube was removed, the pressure of the "tubeless" used for that tests was adjusted to 4,00 bars (60 p.s.i.)(size of the tires : 195/70 R15), 2 different brands of tires, both tires showing a rather worn and thin tread.

3) Vehicle used for the tests : LCV of RENAULT, Maxcity model.

4) Length of the headless steel nails used : 60 mm (2 3/8 inches), diameter 4 mm (5/32 of inch), penetration angle about 90 degrees. Speed of the vehicle at the time of penetrations ≤ 5 km/hour (3 miles/hour) , in order to get a good camera footage.

5) Driven distance after penetration : about 1 km/1,6 km(1 mile) and then the wheels have been removed from the vehicle and stored for 72 hours with the nails left completely stuck in the treads.

6) Driving speed after penetration of the nails: from 60 to 70 km/h (40/45 miles/h).


Checking 72 hours later :

1) Pressure : unchanged !

2) Appearance of the perforation-resistant membrane : impact of the nail visible on its external side (the side in contact with the layer of lubricated micro balls) but no perforation of its internal side (the side facing the inside of the pneumatic enclosure) which accounts for the unchanged pressure of the tire in spite of the severe perforation of the tread : the length of penetration of the nails are respectively of 43 mm (1 11/16 of inch) for the tire # 1 and of 45 mm (1 3/4 of inch) for the tire # 2.

Latest news & Updates :

July 7, 2010 - European patent issued,

July 9 and 12, 2010 - Validation tests "on the road",

Nov. 26, 2010 - French patent issued,

Dec. 21, 2010 - Innovative project eligible for Government subsidies,

July 14, 2011 - Russian Federation patent issued,

Dec. 21, 2011 - People's Rep. of China patent issued,

Aug. 14, 2012 - U.S. patent issued,

Sep. 21, 2012 - Hong-Kong patent issued,

May 16, 2014 - Japan patent issued,

Apr. 28, 2015 - Canadian patent issued,

Jun. 17, 2015 - Interview French magazine «PNEUMATIQUE»
Click to view the corresponding article.

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