A pad tunes a good seat. It cannot rescue the wrong shell
Lower-back support should fill a small gap and keep the pelvis settled. If the driver is being pushed forward or fighting the side bolsters, start with seat fit and angle instead.
Set the seat angle, wheel and pedals first. Drive or sit long enough to find the actual pressure point, then add the thinnest support that solves it. More air is rarely more comfortable.
Persistent pain, numbness or weakness needs medical advice. A pad is a comfort adjustment, not a diagnosis or treatment.
Work out whether the gap comes from the seat or the setup
Sit with the pelvis against the back of the seat and feet on the pedals. If reaching the wheel pulls the shoulders away, move the controls or seat before adding padding. Check base angle too. A seat tipped too far back can make the lower back work all day.
Cameron uses pads after the shell has passed the hip, thigh and shoulder check. That order matters.
Fixed foam and inflatable cells feel different
A fixed foam pad gives the same support every time and has no valve or hose to place. An inflatable pad is easier to tune between drivers or between road and track positions. Multi-cell pads spread adjustment across a wider area; a single cell makes a smaller change.
Check that the pad sits flat under the removable cushion and does not cover a harness slot or create a hard edge.
Add less than you think, then give it time
Start nearly flat. Add support in small steps while the driver stays in the normal position. The aim is contact, not a bulge pressing the spine forward.
Set the normal driving position
Use the shoes, wheel and pedal reach you drive with.
Place the pad low
Centre it on the gap rather than assuming the cushion seam is correct.
Add a small amount
Inflate or shim gradually.
Drive a full session
Pressure points often appear after twenty minutes, not two.
Record the setting
Mark a hose or note the foam thickness for the next setup.
Support must not change restraint fit
Recheck shoulder and lap-belt position after adding any pad. The driver must remain fully back in the shell, with the lap straps lying low across the pelvis. Keep bulbs and hoses away from pedals, runners and sharp bracket edges.
Remove a damaged or leaking pad rather than compensating with more pressure.
Lumbar-pad questions
How much should I inflate a lumbar pad?▾
Only enough to fill the gap and support the driver. If it pushes the torso forward, reduce it.
Can a lumbar pad make a bucket seat fit a smaller driver?▾
It can tune a small backrest gap, but it cannot correct an oversized base or unsupported shoulders.
Where should the hand bulb go?▾
Somewhere the driver can reach if adjustment is needed, but away from pedals, runners, harnesses and sharp edges.
Can I use ordinary household foam?▾
Use a purpose-made seat pad or material whose density, fire behaviour and installation suit the intended use. Competition equipment may have additional rules.
We can help find the cause
Tell us where the pressure starts, how long it takes and which seat and car are involved. A showroom sit is the quickest answer when possible.
Contact usBook the showroom