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topic has been debated and discussed many times. bottomline, honda did not engineered the car to be using 20" wheels and tires to start with. they engineered the handling first.How do you feel with the performance of the car as far as steering, torque steer, or anything else I may be missing (I'm a noob). I feel like I should be at 20 because that's how they designed and engineered the car.
20" sizing was a marketing decision because market wants bigger wheels. they sell 18" - ppl upsize to 19" and 20". they sell 20" then people go downsize. honda never wins. porsche, audi, lambo, etc. all getting bigger and bigger wheels...some 21" standard now. big wheels are called "fashion wheels" for the street and are not for track use.
regarding torque steer etc. that has to do with wheel offset, width, tire sidewall height, alignment etc. that impacts scrub radius. also, how much power are you putting down matters. the fk8 comes with 306 crank hp. if you modify and put 400 crank hp - you will get torque steer no matter what you do in wheel sizes...just fact of engineering. more power more torque than the suspension design can handle.
to keep things simple here: oem car comes with 0 scrub radius. when you make changes and impact scrub radius, there will be compromises - how much depends on how extreme you go. i've written a few articles about proper wheel sizing and tire sizing to keep impacts to a minimum.
will there be torque steer? yes. how much? minimal...when you go up to our recommended max specs of: 1) wheel width no wider than 9.5", 2) wheel offset no less than +45mm et, and 3) keep tires exactly same circumference as oem circumference. all those recommendations also apply to avoiding fender rubbing/cutting/etc. when lowered on pro kit, spoon, sportline, and swift springs which we've tested and document.
really is everything is a set of compromises. many don't know what torque steer in a straight line is vs in a corner...regardless if oem setup or ideal aftermarket setup. in fact the stock setup has torque steer in a corner most don't know about but only think of straight line torque steer which as been a great selling and marketing point.
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