Big Brake Upgrades via the BMW G series catalog

[Z4m40i]

**EDIT** this information I posted is incorrect

I didn't buy the 395mm adapters. I bought the 380mm adapters.

I should have test fitted my 18's but i was in a rush getting the car prepped for a track event, that ironically got cancelled.

I'll measure the OEM 19's barrel and some of my 18's and compare.

That photo is a M340i, which shares the same hub as ours. So yea, something isn't adding up with my test fit. lol

Got info on the other supplier?

Understood, the description for these adapters from the seller state they are for the f90 m5 calipers. I was thinking that the adapters differ, and they may have sent you the wrong ones. I now understand that these are the SAME adapters you would use for the f90 m5 395mm and the g80 calipers 380mm rotor. In other words, same mounting position for both calipers. I originally thought that a different adapter could push the caliper further for a larger rotor, hence why the caliper was so close to the barrel.

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[Z4m40i]

no official company, just a referral to the person selling them. “Mpower Alex” on facebook

this is looking more to be wheel related now. Fingers crossed it’s that, and maybe continues to be an option for those with aftermarket wheels!

 

[razorlab]

Understood, the description for these adapters from the seller state they are for the f90 m5 calipers. I was thinking that the adapters differ, and they may have sent you the wrong ones. I now understand that these are the SAME adapters you would use for the f90 m5 395mm and the g80 calipers 380mm rotor. In other words, same mounting position for both calipers. I originally thought that a different adapter could push the caliper further for a larger rotor, hence why the caliper was so close to the barrel.

No, they are different adapters. 395 and 380 are different adapters. The 395 have that additional step to push the calipers out more from center to fit the larger 395 rotors. If you look at the 380mm adapters, there is no step.

https://tro-nik.com/product/front-adapters-g20/

The actual bit that bolts to the hub is the same on both though.

 

[razorlab]

no official company, just a referral to the person selling them. “Mpower Alex” on facebook

this is looking more to be wheel related now. Fingers crossed it’s that, and maybe continues to be an option for those with aftermarket wheels!

799 euros for just the adapters?!?!?!??! More than double the price compared to the 300 euro Tronik ones. F that.

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