Yes 175/65/R14. But but but but...if for normal driving, common Goodyear Duraplus or Conti Contact CC5 are already very good enough. Im currently running on stock rim with conti contact cc5. It performs better than I expected but will be a little bit slippery in rain. But i dont think it matters coz I actually tried it at quite a high speed we wont usually do when taking corners like that in a myvi and also on a quite controlled situation.175 ah? Erm... I dunno. I think I might have swapped them out with 185 along the way and forgot about it.
TS, if you want performance or better grip for safety as you mentioned, change the rim to a wider one first lol. If not, the driving style itself determines the safety issue here.....cheers