FAQ - HANS
What size HANS® do I need?
The width of the HANS® collar is sized to fit your neck or shirt collar size.
• 12 to 15 Inches (30,5 cm - 38 cm) - Size Small (S)
• 15 to 18 Inches (38 cm - 47cm) - Size Medium (M)
• Over 18 Inches (> 46 cm) - Size Large (L)
What type of shoulder belts work best with a HANS®?
Most FIA or SFI approved racing harnesses work with HANS®. Typical 3" (75mm) wide shoulder belts will work with HANS®. You may notice some overlap of the harness from the HANS® but this will not effect the performance of the device. The HANS® specific harnesses 2"/3" (50mm/75mm) designed and developed by SCHROTH allow the shoulder belt to lay completely on the HANS® and may fit better in some of the trickier installations. In all cases we recommend the use of Polyester webbing material and most importantly proper installation and geometry of the harness system.
My belts sometimes slip off the device. What's wrong?
Properly mounted belts do not slip off the device. If your shoulder belts will not stay securely over the device when you are firmly belted in chances are that you do not have the shoulder belt mounts properly located in your chassis. Please review the section of the SCHROTH Installation Instructions (EA 8.2) concerning shoulder belt mounting.
When should I replace my HANS® device?
Snell recommends replacing competition helmets every five years. HANS® devices are made with similar materials and resins. They are also exposed to similar environments. Snell's five-year rule for helmets is only a guideline, but it is one we think users should consider when reviewing the integrity of a HANS® device. Auto racing is dangerous, and the consequences of auto racing accidents can be violent and permanent. As a result, only HANS® devices that are in top condition should be worn in competition. The form of racing in which a user competes may also dictate the timeframe for replacing a HANS® device, especially if a user competes in open cockpit environments. Even the best materials deteriorate over time. Further, we recommend a user replaces their HANS® device if it is involved in an accident or shows any signs of structural damage. If in doubt about the integrity of a HANS® device, it should be replaced.
I can touch my chin to my chest with the device on. Is this a problem?
No. The HANS® tethers offer a great deal of mobility while still reducing the chance of injury. In an actual impact, the HANS® will remain stationary with respect to the shoulder belts, while your body slides forward until the tethers straighten. (Your head will not swing down towards your chest). The slack in the tethers is taken up before the belts restrain the torso, the HANS®, and the head together.
How do I care for my HANS® device?
HANS® devices should be kept clean and dry. Extreme hot or cold environments should be avoided. They should be kept away from petroleum products or other corrosives as these can have unexpected results on even the strongest composite materials and resins. To protect them, HANS® devices should be stored out of direct sunlight or in a bag. They may be cleaned with soapy warm water.
What if my HANS® device is in an impact?
Like all driver safety equipment, HANS® devices should always be inspected after an accident. In a simple self-inspection, users should look for signs of de-lamination or surface cracking and exposed composite material under the finish. However, even the most thorough visual inspection and strength testing can fail to detect damage. This is one of the reasons that we do not resell used devices, and we do not recommend that anyone buy a used device. If in doubt about the integrity of a HANS® device, it should be replaced.
FAQ - Harnesses
How many years is a FIA harness valid?
FIA harnesses are valid for 5 years plus the year of manufacture. This means if you buy a new harness manufactured at the beginning of the race season in 2006 your harness will be valid for racing for the 2006 season and the next 5 years, expiring at the end of the 2011.
What is asm® and how does it work?
SCHROTH asm® is a patented energy-conversion system designed to help prevent submarining in the event of an accident. The asm® system is located at the in-board shoulder belt. It is designed to "elongate" allowing a slight rotation of the upper torso in the very early milliseconds of a crash. This rotation of the upper body also rotates the pelvis slightly and loads the lap belts earlier, preventing the body from submarining under the lap belts. (see video - English) The asm® system is standard on all 4 point SCHROTH harnesses where no crotch strap is available to keep the lap belt properly positioned.
When should I replace my harness?
Harnesses should be replaced after any moderate or severe impact. The properties and strength of the webbing and components may be altered in the event of a crash. Webbing is manufactured with a pre-determined elongation (stretch) to bring the occupant to a controlled stop. The hardware components may be weakened or damaged. Therefore it is recommended to replace any harness which as been used in an accident. Any extreme fraying of the webbing or deterioration due to prolonged exposure to weather or chemicals (gas, oil, cleaners, brake fluids, etc) should be replaced.
What is a Hybrid™ Harness?
The Hybrid style crotch belt setup is a new technological breakthrough from SCHROTH. Each sub strap has a loop sewn in the end which loops around the hardware for the lap belts. The lap belts then click into the cam lock and provide for a more efficient and comfortable transfer of energy to the cam lock keeping the occupant in place.
2" (50mm) or 3" (75mm) wide Lap Belts? Which is better?
The main premise behind the 2" lap belt is one of added safety. A 2" belt rides within the crest of the human pelvis where a 3" belt would rest on the edges. This allows you to get the belt up to 1.5" (40mm) tighter. That means the lap belt will be working earlier in the accident event because it gets loaded faster. The 2" (50mm) webbing is rated over 6000lbs and is approved by FIA and SFI. It's also more comfortable.
FAQ - Tuning
Can I install the SCHROTH tuning belts in to any car?
SCHROTH belts should be installed ONLY into approved vehicles. Every vehicle on our vehicle reference list has been tested for the proper installation geometry, installation points and strength of the original factory seat.
Where do I install my new SCHROTH belt?
The tail strap must be attached either to the C-Pillar or to the D- and/or E- points ( rear seat lap belt anchor points ) depending of the approved installation for each vehicle. The lap belts of the SCHROTH belts will attach to the original lap belt anchor points in the vehicle.
When do I need the Adapter ( 01003 )?
This is for use with the asm autocontrol with installation to the D-Point.
Can I still use the rear seats to carry passengers or cargo?
Yes, most SCHROTH tuning belts (except the Rally Cross and Profi FE) are designed with a quick release disconnect which allows the harness belt to be removed for transport of passengers or cargo in the rear seats. Never use SCHROTH harness belts with the rear seats occupied.
Why do I need a left and right side belt (driver/co-driver)?
The patented asm® system is designed to be installed on the in-board side of the vehicle. The asm® system is located in the inside shoulder belt and thus requires 2 different harnesses (left and right) for each seating position. Please make sure the belts are installed on the correct side of the car!