19x10 et25 front w/Ohlins R&T tire size

Tried searching beforehand, but couldn't find a definitive answer that included Ohlins R&T on an e90. I have 19x10 et25 square Arc8 wheels and wanted to find out if I need a 5mm front spacer with these coilovers to clear the perch. My setup is out of the box factory springs etc.

Was initially attracted to the setup on 265/35 as I had seen them on another user's car in this exact spec, but I never got a chance to ask their suspension setup. Sounds like I need to run 275/30 though?

Well I have 19x10 ET20 wheels with 275/35/19 tyres in the rear, -3.5 degrees camber up front, and I tried putting them up front to see how they'd fit, and they were pressing against the spring.
So yeah I can tell you that won't work

275/30/19 and 5mm spacer should in theory though, based on the Apex fitment guide it will
https://apexwheels.com/fitment-guides/bmw/m3/bmw-e90-e92-e93-m3-wheel-and-tire-fitment-guide
But if you get aggressive with the camber you might need 7 or 10mm spacers.

I'm running 19x10 et 25 square VS5RS on my car. with Ohlins. 5mm front spacer 12mm rear. 275/30 Michelin PS4S. Arc 8's are probably pretty similar. Note* mine don't need spacers to clear, but it looks better.

I'm currently running 19x10 et25 in the front on stock ZCP EDC suspension. PS4S 265/30 tires. Stock front camber settings.

There is not much clearance at all between the wheels and the body of the shock.

From what I understand, with the Ohlins R/T, the spring perch sits lower than the stock shocks.

I can't imagine it would clear without a spacer. It barely clears as is.

Adding a spacer just feels like a very non-optimal solution. With 19x10 et25, the wheels already poke a couple of mm past the fender. Spacers are just going to make it worse. Not to mention adding spacers just means you have the wrong offset to begin with.

Adding camber will also bring the top of the wheel closer to the shock body.

I think the real answer if you want to run Ohlins R/T currently is you need to be running a 19x9.5 max with a different offset.

On the other hand, if someone is running 19x10 et25 without a spacer on Ohlins R/T without any clearance issues, I would love to hear it.