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Does anybody know what is the largest diameter tires you can fit on the Q50's 19" stock wheels and still clear/not rub the wheel wells in turns & articulation?

I want to get the S but would like to soften up the ride by getting rid of the Run-Flats and possibly going a little taller in the size to get more rubber/air between the pavement and the wheel. Is it possible to go a little bigger than the 245/40R19 stock size tires and not cause any issues?
 

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Does anybody know what is the largest diameter tires you can fit on the Q50's 19" stock wheels and still clear/not rub the wheel wells in turns & articulation?

I want to get the S but would like to soften up the ride by getting rid of the Run-Flats and possibly going a little taller in the size to get more rubber/air between the pavement and the wheel. Is it possible to go a little bigger than the 245/40R19 stock size tires and not cause any issues?
get details on the wheel/tir from OM and
Try here : Tire Size Calculator - Tire & Wheel Plus Sizing

**Warning!**
When changing tire sizes, stay within 3% of the diameter of the original tire. Any more than this and you face the risk of brake failure
 

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get details on the wheel/tir from OM and
Try here : Tire Size Calculator - Tire & Wheel Plus Sizing

**Warning!**
When changing tire sizes, stay within 3% of the diameter of the original tire. Any more than this and you face the risk of brake failure
I thought at most the brakes would fade a bit, brake failure is like not having your brakes work at all, i doubt it can get that extreme.

I guess anyone going above the 3% should start looking into upgrading their brakes, pads, rotors, etc.
 

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Diameter? That would mean going 19" tires to 20"! Might have better luck asking for a bigger sidewall! Meaning going from 245/40/19 to 245/45/19! It might work! Not sure if it'll look good though! Maybe ask some online tire shops to get an idea!

Remember also to factor in that there are tires that run large, true or small!

They might have the same specs but some look beefier or smaller/low profile than others!
 

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The brakes on the q50 are stout... Doubt you get enough increase to have noticeable impact on braking. Speedo and odometer will need to be recalibrated though. Maybe pm vossen, I'm sure they've calculated a bunch of measurements when developing their wheel/tire option.



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Vossens measurements were for wider wheels though but it doesnt hurt to ask!
 

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Vossens measurements were for wider wheels though but it doesnt hurt to ask!
Still love that effing video. I won't talk to them for fear of purchasing a set from them :).

It seems they would have done a series of measurements though... Considering they lowered their vehicle, just assumed they might have some insight into how much room is available I that wheel well. My gut is that there isn't much... I believe Infiniti did a good job in filling that area with the stock wheel/tire combination.



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Still love that effing video. I won't talk to them for fear of purchasing a set from them :).

It seems they would have done a series of measurements though... Considering they lowered their vehicle, just assumed they might have some insight into how much room is available I that wheel well. My gut is that there isn't much... I believe Infiniti did a good job in filling that area with the stock wheel/tire combination.



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Haha! Ive been talking to them actually and am really enticed in gettingnsome CV7s! Haha! But I promised myself that I am going to do the right thing this time and save up the money while I wait for suspension parts(Coilovers, Rear and maybe front camber kits) befote I purchase my wheel! Courtney Wingfield's 328i set up has me inspired though! :D

 
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245/45-19 could be a contender

Remember also to factor in that there are tires that run large, true or small!

They might have the same specs but some look beefier or smaller/low profile than others!
True, true, true. I discovered this way back when sizing tires for a Datsun 280Z project. Three different manufacturers, same size tire, all sitting side by side. Three different diameters.

I am seriously considering a 245/45-19 to replace the 245/40-19 stock RFTs.
I realize it is outside the 3% rule. It calculates out to be .96" more in diameter.
My initial look at the front strut clearance appears to be favorable.
 

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True, true, true. I discovered this way back when sizing tires for a Datsun 280Z project. Three different manufacturers, same size tire, all sitting side by side. Three different diameters.

I am seriously considering a 245/45-19 to replace the 245/40-19 stock RFTs.
I realize it is outside the 3% rule. It calculates out to be .96" more in diameter.
My initial look at the front strut clearance appears to be favorable.
here's spec for oem:
WHEELS AND TIRES
Road wheel
Type Size Offset in (mm)
Conventional
17 6 7.5J 1.77 (45)
196 8.5J 1.97 (50)

P225/55RF17 95V or P245/40RF19 94V or 245/40RF19 94W
Pressure PSI (kPa) [Cold] 35 (240)
 
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