Subaru has done the same thing on my '21 Legacy. Tires are 225/50-18 (Ø26.85"), but the compact spare is a 155/70-17 (Ø25.84"). In the fine print in the owners manual it says to use this spare only on the rear end, and don't go over 50 mph! That is crazy. Stupid fact is that the spare tire well will easily hold a Ø1" bigger tire. Like if it were a 155/70-18. That's what the spare should be! W.T.F. Subaru?