Update: Nevermind. Figured it out. Go with X99154N.
I went to Canadian Tire and the wheels they have has different offset size (40mm) from what I got from dealer (50mm). Anyone used to order steel wheels for 2014 Mazda 3 Sport GS from Costco? I'm checking their fitment guide and am confused whether it should be hubcentric or universal Please shed me some light.
Hub centric means that the wheel centre hole is sized to excactly match the hub that the wheel is mounted to. You definitely want hub centric! Non hub centric wheels rely on the lug nuts (or bolts) to centre the wheel properly and this is never as good. Even a non discerning driver will notice a vibration with this set up as the wheels will have an ever so slight hop.
Exactly match? The OE wheels on my vehicles are presumably hubcentric, yet there’s a tiny bit of play between the hub and the wheel. Not a lot, but enough that I can wiggle them up and down and side to side a noticeable amount. Maybe it’s only a fraction of a millimeter, but the point is that it’s not zero, so the wheel does in fact get centered around the lugs when you torque it down. That’s why the wheel has conical seats and the lugnuts are conical also.
I’ve had lugcentric wheels and they were totally fine: you just need to take extra care to make sure the lugnuts are seated properly. But I agree that hubcentric is way more convenient - for sure I’d spent the extra few bucks for that.