To be honest, I never took out the spare tire yet, to see what it clears, but in general, most space saver rims are bigger in diameter than the main wheels the cars roll on. I should check someday, but the should be 17" or larger. I also have a spare, Ridgline space saver wheel/tire (upgraded to a full size for the truck)... so that might be thrown in the mix if needed.
As for ABS lockup.. never had it lock up once! The ABS will not allow it since it will release it from locking.. thus, doing its job... however, we've never had the ABS kick in either~
I do have 245 wide, performance rated tires, so I'm sure that helps too.
My wife has already had several instances where the car in front of her stops suddenly (there was something in front of them, that no cars behind could see), and swears the brakes prevented an accident... I know I sound like a broken record... but serious, the brakes STOP the van w/o any effort. Just like it should. the original brakes were just scary... lots of sliding (weak brake power?), which lead to heavier brake pedal mashing... which leads to brakes overheating, which leads to brakes warping... which leads to replacing brakes again (cutting rotors is only a band-aid fix)...etc.
I know it's not for everyone... but do it if you can. In my book, this is pretty cheap for a bigger brake upgrade... and all original Honda parts too. (well sort of.. I used aftermarket, oem spec rotors).