[Jimilove335]

I bought these 437m with new contisuper sport from a nardo grey m3 owner for 3000 canadian，a 100% steal. but tires stick out too much for my taste after installation, then I swapped tires with a m2(245 front and 265 rear), now it looks just perfect.
Just ordered a pair of dinan spring and bump stops,planning on installing at bmw dealership next week for 700 canadian, because my local shop gave me a quote for 500 to install these springs, I decided pay extra 200 for dinan warranty, any thoughts and advice?

after swapping tires

before

[Jeff_335]

Since your car is x-drive you must respect 1% difference between front and rear tires. With the current spec ( m2 tires), there's 1.9% difference, you should change tire if you want to avoid any potential problems!

Nice car btw, whats the tint% ?

[.BMW.]

Originally Posted by Jeff_335

Since your car is x-drive you must respect 1% difference between front and rear tires.

+1

Buy new tires with matched diameters!

[Jimilove335]

Originally Posted by Jeff_335

Since your car is x-drive you must respect 1% difference between front and rear tires. With the current spec ( m2 tires), there's 1.9% difference, you should change tire if you want to avoid any potential problems!

Nice car btw, whats the tint% ?

sorry,but the tints come with the car when I bought it,I do notice some difference during shifting gears,by the way its a manual

[Jeff_335]

I'd asked dealer what they think about your tire size when they'll install springs.
You will love this car, any plans to mod it? I have a manual '14 335 m perfomance edition with a jb4, the difference is incredible !!

[Jimilove335]

Originally Posted by Jeff_335

I'd asked dealer what they think about your tire size when they'll install springs.
You will love this car, any plans to mod it? I have a manual '14 335 m perfomance edition with a jb4, the difference is incredible !!

thanks for your tip,I wanna to tune it ，but not gonna do it until my warranty ends.and I have mppk on it already

[blue dragon]

You definitely want matched diameters. I opted to keep the stock runflats with my 437M wheels, but will be switching to 245/35 and 275/30 MP4S rubber when then run flats are done.

[B45_F30]

Just purchased 437m myself. 1300.00 planning to put 245/35. 265/35. Is there any rubbing if you put Dinan springs and stoppers. Do you have to have dealer install it? Can it be an authorized dinan dealer? Planning to put the dinan exhaust too. Thanks for any input from you.