New Tires, DCT issues

[AaronLG]

Guess I should've done a little more research. Just put on some Nitto 555G2 in 275/35/20 and 315/35/20.

For example in 4th gear if I go to coast, RPM's drop abruptly. Then down shifting it does a double rev before shifting. Watch this quick clip to better understand. Is it the tires causing the issue? Do I need to get a different size? Was trying to get the widest tire but also have some driveablity since it's my daily.

Mods- BM3 stage 2, downpipes, muffler delete, charcoal filter removal.

https://www.youtube.com/watch?v=r6WhhJZyAQI

[Noggie]

Originally Posted by AaronLG

Guess I should've done a little more research. Just put on some Nitto 555G2 in 275/35/20 and 315/35/20.

For example in 4th gear if I go to coast, RPM's drop abruptly. Then down shifting it does a double rev before shifting. Watch this quick clip to better understand. Is it the tires causing the issue? Do I need to get a different size? Was trying to get the widest tire but also have some driveablity since it's my daily.

Mods- BM3 stage 2, downpipes, muffler delete, charcoal filter removal.

https://www.youtube.com/watch?v=r6WhhJZyAQI

Rear tire is wrong, should have been 315/30/20.

You currently have a 4% circumference difference front and rear.
The BMW electronic will start throwing weird issues if the circumference difference between front and rear is too large as it sees the front and rear wheels rotate at different speeds.
On X-drive vehicles it needs to be below 1%, RWD cars can take a bit more.

Had you put on 315/30/20 the difference would have been -0,7% and you would have been OK.

[arucano]

Have you checked the difference in outside diameters. I think they have to be within 2% or you will alter the shifting and ABS / DSC behaviour.

[AaronLG]

Welp. Thanks for the help. New tires ordered. Apparently there are only 8 in the country. FML.

[AaronLG]

Got the new tires on and everything is fine. Thanks for the help!