Lexyaaaas

iTrader: (2)

I recently installed BC extreme low suspension on my 2015 IS350. 18K fronts, 20K rears and the shocks were valved accordingly @ BC. Looks and rides pretty great!
But I have an issue, I'm at the max height adjustment on the driver rear wheel and this is barely enough to clear a 18x9.5 +23 with a 225/40/18 tire (this is a decent stretch). I only rub now on big bumps in the rear. Front doesn't rub at all, also has plenty of adjustment still up and down.



I had plans to run a 19x8.5 +15 with 225/35/19 all around but if I'm rubbing now with these 18s, I'm thinking I probably can't fit 19s without rubbing.
Why does the rear not have the upward height adjustment that the fronts have? What am I missing here?
I talked with Matt @FIGS and he said they had one similar issue before with the rears on BC extreme lows. Anybody else ever have an issue?

Lexyaaaas

iTrader: (2)

Forgot to mention this is with swift springs. Not sure if that makes any difference.

FIGS

iTrader: (11)

We are working on getting the longer shock components to get you what need. Sorry I left for vacation the same day you contacted us, but I am meeting with BC tomorrow here in FL to work it out. The issue is the shock total length is limiting ride height, so no matter how much you preload the spring, it will still max out at the shock max length. We will let you know via email on timeline. This is one configuration complexity with the divorced spring and shock vs a true coilover. Thanks, Mike

Sasnuke

I'm sure the obvious has probably been pointed out before that the tire is too small for the rim and the offset is too low for the rear rim.
Raising the rear enough should give you enough clearance for the tire to not rub, but then again that negates the whole "extreme low" concept...plus you mentioned the adjuster is maxed out already.
Good luck with the fix.

The car looks nice though.