My 295/30/18 SQUARED setups

[SYT_Shadow]

Originally Posted by F82ny

M3SQRD MineralWhiteF80 SYT_Shadow

Maybe you guys can point me in the right direction please. Your responses seem to be about clearance between the FRONT strut tube and tire. But how much minimum clearance is “safe” to have between the REAR tire and REAR strut tube on a f82 M4 with 20” Competition wheels that is moderately lowered. For the sake of this, Assume the car is already on the ground, so suspension is loaded. Is 3mm still a minimum to target?

in the rear, my concern is always rubbing on the fuel filler neck. Otherwise, there is a ton of clearance if you use a reasonable ET.

[F82ny]

Originally Posted by M3SQRD

The rear inner clearance is very different from the front strut clearance. The rear damper is located further back from the wheel mounting face on the brake rotor. I’m aware of two people that have fit 325s on 12” wide wheels on the rear and quite a few people with 315s on 11”-11.5” wide wheels. 305 on 11et44 is one of the most used aftermarket wheel setups used on the rear. You’d have to be running something really wide with high offsets to run into a problem on the rear. A 295 on a 10.5” wide wheel with offsets between 36 to 46 (M2CSR 18x10.5et46 513M wheel) will all work without any inner clearance issues. Is there something specific you’re looking at for the rear?

Well…. Mainly curiosity. Because everything I see relating to strut-tire clearance with this platform is always about the front, not the rear. Since the rear is a divorced set up, wanted to know at a minimum, how much clearance (in mm) is needed between rear tire and rear strut. I’ve seen people here saying for the front, they target 5-10 mm, but is it different for the rear?

Originally Posted by SYT_Shadow

in the rear, my concern is always rubbing on the fuel filler neck. Otherwise, there is a ton of clearance if you use a reasonable ET.

Valid concern on the fuel filler neck. With the car on the ground, suspension loaded, how much clearance in mm do you target between the rear tire and strut?

[M3SQRD]

Originally Posted by F82ny

Well…. Mainly curiosity. Because everything I see relating to strut-tire clearance with this platform is always about the front, not the rear. Since the rear is a divorced set up, wanted to know at a minimum, how much clearance (in mm) is needed between rear tire and rear strut. I’ve seen people here saying for the front, they target 5-10 mm, but is it different for the rear?



Valid concern on the fuel filler neck. With the car on the ground, suspension loaded, how much clearance in mm do you target between the rear tire and strut?

It’s not discussed because, as far as I know, there hasn’t been any rear damper, even with rear coilover setups, clearance issues with common 295 tires and even with 325 tires. As SVT_Shadow pointed out, the fuel filler neck is the likely cause for rear inner clearance issues. All of the setups I’ve used, none have been close enough to the fuel filler neck to warrant taking any measurements. There would be plenty of pictures and documented clearance measurements if the fuel filler neck clearance was a common problem when trying to run 295-305 tires. I know a 325 on a 12et47 rear setup had no clearance issues which is way more aggressive on inner clearance than the typical 10.5et36-46 - the 12et47 puts the inner lip 3/4” farther inboard than the 10.5et46 (at ~$400/wheel delivered, I’m surprised the forged f87 M2CSR Motorsport 513M 18x10.5et46 wheels aren’t used more even with the front requiring a 25 mm spacer, including me).

[SYT_Shadow]

Originally Posted by M3SQRD

at ~$400/wheel delivered, I’m surprised the forged f87 M2CSR Motorsport 513M 18x10.5et46 wheels aren’t used more even with the front requiring a 25 mm spacer, including me).

If we were all wiser, I think we would use them more often

[SYT_Shadow]

Originally Posted by F82ny

Valid concern on the fuel filler neck. With the car on the ground, suspension loaded, how much clearance in mm do you target between the rear tire and strut?

When trying a new combo out, I'll check every few sessions. Some rubbing is ok, but you don't want the tire eating through the wheel well.

This situation exists with 275 tires as well, so it's an issue of rear ride height, not shock-wheel clearance.