SFI Certified; Competition use only!
This quick release will only bolt to 3 bolt patterned Wheels and welded on hub shafts. This is NOT a hub, welding is required in order to use this.
It is developed especially for formula cars. Chromium molybdenum steel SCM435 is used for the plug in order to weld the steering shaft easily; SUS420 is used for the liner in order to realize the lightweight and high-strength of sleeve. Moreover, the socket made byextra super-duralumin (A7075T6) and special plating fulfills the endurance. Assuming the hard use of the plug top, protective cap is installed. It is possible to change the damage protective cap to a new one.
| Utilization |
: |
for competition
cars |
| Applicable steering wheels |
: |
any wheel
matching a
PCD 50.8mm,
three holes |
| Attachment
style |
: |
weld |
| Main materials |
: |
plug= chromium
molybdenum
steel SCM435,
socket = aluminum
alloy A7075T6,
sleeve=aluminum
alloy + stainless
steel SUS420,
ball=steel
SUJ2 |
| Size |
: |
length 63.5mm
(except the
weld part),
diameter 69.6mm |
| Weight |
: |
300g (plan) |
Rapfix Racing cleared the NAPAC standard (a standard for after market products in Japan). A screwing test was done to check the operation of steering wheel to radial power. There was not any change in the shape after being pounded by dead loads of 29.7kg.m (291N.m). Moreover, there was not any change in the shape after a bending test of dead loads of 19.8kg.m (194N.m) in order to examine the effect when a driver impacts the steering wheel in an accident.
According to the results of these tests, although the bending test and screwing test based on regulation loads caused the permanent transformation and the shakiness increased, the product is still possible to be detached and attached and it is not broken. Therefore, these tests prove that the steering wheel can still be operated when large loads act. According to these results, Rapfix Racing has the same or more strength than the spline style Quick Release Hub of other companies.
We also tested that how much can be released when the plug and socket are pulled strongly. They were not destroyed by 3754kg(36.8KN). The test was ended when the bolt, which is fixed to the steering wheel, was destroyed. The quick release function can be still operated. Therefore, it is confirmed that Rapfix Racing could endure the pull power of 68G because the standard weight of a driver according to Japan Safety Standard is 55kg. We did 10,000 times repeated attachment and detachment tests for testing the endurance. We proved that there is no broken and it is still possible to drive, attach and detach, although the shakiness increased.
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