Let's see all the c63's on H&R springs (or anything)
These size will fit fine on your 507 wheels, but will rub with 10mm spacers & lowered. Keep the 255/30 if you want to add 10mm spacers.
So just to confirm:
My OEM 19" wheels came with contisport 5P tires (235/35/19 F 255/30/19 R).
I'm planning drop on H&R springs (NO 17mm pad) with 10mm spacers in the rear and 12mm spacers in the front.
Will this set up not rub? (I thought contisport might be a bit wider than your yoko, but not sure how to confirm this)
Could I go up to 15mm spacers in the front?
The Best of Mercedes & AMG
Here are the numbers from tirerack, for 255/30/19, all measured on a 9" rim.
Continental ContiSportContact 5P
- Section Width: 10.2"
- Tread Width: 9.5"
Yokohama ADVAN Sport V105
- Section Width 10.2"
- Tread Width 8.9"
Michelin Pilot Super Sport
- Section Width: 10.2"
- Tread Width: 10"
Hankook Ventus V12 evo2
- Section Width: 10.2"
- Tread Width: 9"
It seems like the general consensus is to switch the 13mm rear spring pad to the 17mm spring pad to make the rear drop even with the front. But what if we leave the rear spring and pad OEM, and just drop the front with H&R springs? Will this upset the balance tremendously?
Just wanted to throw it out there since my last C63 had KW V3, but I'm contemplating if H&R springs will suffice on the 507 street car.

So just to confirm:
My OEM 19" wheels came with contisport 5P tires (235/35/19 F 255/30/19 R).
I'm planning drop on H&R springs (NO 17mm pad) with 10mm spacers in the rear and 12mm spacers in the front.
Will this set up not rub? (I thought contisport might be a bit wider than your yoko, but not sure how to confirm this)
Could I go up to 15mm spacers in the front?
Well yes u will be ok with this set up with 12mm front. 15mm is also doable depending on the tire brand as u stated, but contis should clear.
It seems like the general consensus is to switch the 13mm rear spring pad to the 17mm spring pad to make the rear drop even with the front. But what if we leave the rear spring and pad OEM, and just drop the front with H&R springs? Will this upset the balance tremendously?
Just wanted to throw it out there since my last C63 had KW V3, but I'm contemplating if H&R springs will suffice on the 507 street car.
As for pics, here is one shortly after I installed H&R springs (they've settled a bit more since). Left the stock rear spring pads in place (13mm):

I ended up getting annoyed by the sagging rear, so installed 17mm rear spring pads a month or so later. IMO, definitely more balanced with the 17mm pads (though not super obvious in the pics). Pic:
As for pics, here is one shortly after I installed H&R springs (they've settled a bit more since). Left the stock rear spring pads in place (13mm):

I ended up getting annoyed by the sagging rear, so installed 17mm rear spring pads a month or so later. IMO, definitely more balanced with the 17mm pads (though not super obvious in the pics). Pic:

I was thinking of going 12mm in front and 10mm in the back. Is there anything else that I need (pads, ect.)? I want to keep it simple, just lower the car a little and try and get the front and even lowered semi-equally without spending too much.
Thanks!




Your spacer choices sound good for stock wheels with stock tire sizes.





