Tire fitment question

[chinaski]

im about to drop by car with some RD sport springs (1.5in Fr, 1.2in rear) but i am running a 225/50 tire size on my 16x7 style 104 rims.
would i be fine to run this size tire with the drop or will i have to change my tire size and/or roll the fenders?

ive searched all over bimmerforums and this site but could not find an answer.

[Ji Money]

My opinion is no to both. I've read about others here going with a 17 inch wheel setup and no fender rolls were required.

[lazoh]

You should be ok with the tire set up that you currently have.

[zoner]

I would say you're fine- I'm running 235/45 on 17x7.5 Style 22's and I'm not even near rubbing.

[Budget M3]

I run 235/40-17 on mine with no problems using AC Schnitzer springs. I don't know the exact amount of drop, but mine is the lowest Ti I have seen in a street car. The below may be useful:

Stock Tire - 225/50R16
Section Width: 8.85 in 225 mm
Rim Diameter: 16 in 406.4 mm
Rim Width Range: 6 - 8.5 in
Overall Diameter: 24.85 in 631.19 mm
Sidewall Height: 4.42 in 112.26 mm
Radius: 12.42 in 315.46 mm
Circumference: 78.06 in 1982.7 mm
Revs per Mile: 837.0
Actual Speed: 60 mph 100 km/h
Speedometer Difference: -
Diameter Difference: -

Tire 1 - 235/40R17
Section Width: 9.25 in 235 mm
Rim Diameter: 17 in 431.8 mm
Rim Width Range: 8 - 9.5 in
Overall Diameter: 24.40 in 619.76 mm
Sidewall Height: 3.70 in 93.98 mm
Radius: 12.20 in 309.88 mm
Circumference: 76.65 in 1946.9 mm
Revs per Mile: 852.4
Actual Speed: 60 mph 100 km/h
Speedometer1: 61.1 mph 101. km/h
Speedometer Difference: 1.839% too fast
Diameter Difference: 1.82%

Tire 2 - 235/45R17
Section Width: 9.25 in 235 mm
Rim Diameter: 17 in 431.8 mm
Rim Width Range: 7.5 - 9 in
Overall Diameter: 25.32 in 643.12 mm
Sidewall Height: 4.16 in 105.66 mm
Radius: 12.66 in 321.56 mm
Circumference: 79.54 in 2020.3 mm
Revs per Mile: 821.4
Actual Speed: 60 mph 100 km/h
Speedometer1: 58.8 mph 98.1 km/h
Speedometer Difference: 1.899% too slow
Diameter Difference: 1.86%

[chinaski]

I appreciate the feedback and information provided. ill be dropping my car either late this week or the next since im waiting on my koni shipment from understeer to arrive on tuesday and my suspension refresh parts to arrive from DDM this week.

[hatchgrafix]

Here's information that I have learned about rubbing...

If you have stock springs, and you don't rub - you won't rub with just a mild 1-1.5 drop. The ti has from what I have learned virtually no bump stop's in the rear, and the stock springs are weak enough for you to tuck the rear way past the fender when you accelerate or just take corners and hit bumps, so my answer is you will be fine.