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Discussion Starter · #1 · (Edited)
As the topic says I want to know if these tire sizes will fit without problems. I'm new to adding aftermarket wheels onto my 2014 Q50s so I want to learn more. Since mine is AWD I had to make the difference lower than 1% to not trigger any funny things for the AWD. Like will I need any spacers and so forth. Currently I'm on stock suspension. Any help is greatly appreciated! Also the wheels I am running are 19×9.5 in the front and 19x10.5 in the back
 

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Q50 3.7, AFE CAI, Helmholtz AB, BMS Cont, 25mm spacers, Stillen Splitter+Diffuser, RSR Downs, UpRev
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The issue is not width but diameter.. You need to make sure the overall tire diameters are within that 1% margin from front to back. Otherwise the wheel speed sensors will throw error codes and cause issues. In your case, it should work fine given that the diameter and revolutions per mile are only .5% different. I would continue to do some research before spending any money just to be sure.



245/40-19275/35-19Difference
Diameter inches (mm)26.72 (678.6)26.58 (675.1)-0.14 (-3.5) -0.5%
Width inches (mm)9.65 (245)10.83 (275)1.18 (30) 12.2%
Circum. inches (mm)83.93 (2131.88)83.5 (2120.89)-0.43 (-11) -0.5%
Sidewall Height inches (mm)3.86 (98)3.79 (96.25)-0.07 (-1.75) -1.8%
Revolutions per mile (km)754.89 (469.07)758.81 (471.5)3.91 (2.43) 0.5%
 
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