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Speedmart Tech Support

Simpson Tips & Definitions
SpeedMart Tech Team

Helmet Fit


A correctly fit helmet should feel as if an evenly distributed pressure is continuously being exerted around the head and cheeks. Helmets, like shoes, will break in. For this reason, the helmet should fit as tight as you can stand to wear it. Once fastened, make sure the helmet cannot be pulled off the head in any direction. If the helmet moves significantly, the helmet is too big. Many people, especially first time helmet buyers, tend to pick helmets that are too loose or too big. If the helmet is too big or too loose and doesn't fit well, then it cannot deliver the best protection.

Firesuit Fit


Air is an excellent insulator and adds a layer of thermal protection. For this reason, a good fitting firesuit should not fit tight. Always have someone with measuring experience (i.e. Simpson Representative, Seamstress, or Tailor) measure using a cloth measuring tape. A 'Made to Order' firesuit measurement sheet has been enclosed for your use. We recommend Flame Resistant underwear with every firesuit order. It can add as much as 50% to the protective value of a firesuit. Understand that fire protection is a function of materials used, the number of layers (more the better generally), and weight or mass. The fire protection indicated by an SFI rating represents a range of TPP's. Higher TPP's indicate better thermal protection.

Equipment Familiarity


Become familiar with the installation, use and operation of all your safety equipment. Practice exiting the vehicle with all your equipment in an efficient manner. Remember that it may be difficult to see in certain crash situations. Practice should include exits by "feel" without the use of sight.

Restraint Installation


Follow all the instructions when installing your restraints. Mounting angle, mount strength and belt path are all critical to a proper mount. Frequently inspect your restraints for wear and abrasion. Replace any restraint involved in a crash with a new set. With crashes in excess of 100 g's becoming more common, you don't want to compromise your safety.

Restraint Inspection


Restraints must be maintained, inspected, and replaced every two years in accordance with SFI 16.1 Specifications. Testing shows that the webbing degenerates from exposure to the elements over time.