L777JDP said I have a 2013 SV with lowered floors and the seat bolts tend to catch on speed humps.
Me too! Until I cut off the protruding bits of bolt. Fine now!
That said, some nicer and more elegant solutions above!
I used dome head stainless steel Allen bolts from screwfix, big bag for very little money. Shorten the bolt and fit from underneath still using the penny washer, the 8mm nylocs that I again got from Screwfix in Stainless sit in the seat channel inside and can be done up with the spanner on end or more easily with a screwdriver wedge against the side of the channel.
It's the apex of the lowered floor , that grounds out over speed bumps on my car .
Mostly the Short but high bumps on private roads ; Like Nat trust car parks, entrances etc.
Perhaps i do need to raise it,,,,,,,or go on a diet.
I wonder how much before you start to affect the handling ?
Mind you ; more sump clearance on the Sigma is no bad thing !
I'd only use hexhead bolts not Allen head type, it doesn't take much of a scrape to render the Allen head type immovable. The underside of my lowered floors have some serious hero marks as does the underside of the exhaust, it's inevitable.
However, after fitting good shocks and having Dave Gemzoe set it all up with 79mm below the sump, I've not bottomed out since. At 79mm it also didn't need any spacers below the steering rack to minimise bump steer, previously I had the often quoted 9mm.
Lotus Seven Club AR Working Group
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The quotes for the 9mm spacer are a little misleading - far too many variables, chassis, bridge, rack mount, TRE's, steering arms etc.
Only sure way is to check each side - well worth doing though
Guessing the new coil overs came with an increase in sring rate too..?
Oh yes, NTR1's courtesy of Simon