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backrest lumbar support
extra support towards the lower back
form should be contoured to the natural āSā shape of the spine
prevents slumping and reduces stress on the spine and pelvis
head rest
supports back of head and upper neck
seat pan (bottom) length
allow for 1-4ā (25.4 - 101.6mm) of space b/w edge of seat pan and back of knee
allow for blood flow
seat pan should incline towards the back
creates a hammock that prevents the pelvis from sliding forward and ensures natural spine position
chart for common causes of discomfort and reasons for them
Mounting:
Aftermarket bucket seat consists of two components
bottom frame
side frame
bottom frame mounts DIRECTLY to the chassis
with four mounting holes on the bottom
IMPORTANT: ASK/RESEARCH IF THERE IS ANY ROLL CAGE MEMBER BEHIND THE SEAT TO HAVE TWO ADDITIONAL MOUNTING POINTS
this improves safety as there is additional mounting points to secure the seat
side frame connects the seat (WHICH SHOULD HAVE MOUNTING HOLES) to the bottom frame
Below is equipment used for side frame to seat mount
Metric 10.9 bolts and spacers (top)
Nylock nut and fender washer (bottom)
Loctite / threadlocker
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