New wheels - TCS light intermittent

[Risen]

I recently got a new set of wheels. Unfortunately, the manufacture doesn't make them in 17 inch, so I went with 18x8 in front (45mm offset with 5mm spacer) and 18x9 in rear. Front tires are 225/40/18 and rear tires are 265/35/18. I placed the fronts first and test drove the car and the TCS light would come on (intermittent - Car hits the brakes as I accelerate so I have to turn it off). Is it because the front wheel is 18 and not 17? or is it because of the tire size?

 

[DASHNBY]

The tire size for the front should be 215/35R18 with your current 265/35R18 rear. The 225/40 for the front is too large.

 

[shern]

What he said. Your front/rear outer diameter ratio is off.

 

[docjohn]

question is who told you to use a 40 series tire on an 18 inch wheel?