The word אופן ofán = wheel. (See Ezekiel 1:15 here: https://www.sefaria.org.il/Ezekiel.1.15?lang=bi&with=all&lang2=en, which is the first mention of the word.) So, אופניים literally means "two-wheels," as KdPomi indicated when he said it was dual, like the bi- in bicycle indicates two wheels.
Motorcycle is אוֹפַנּוֹעַ. The נוע part indicates the motor (the dagesh in the middle of it means it really should be transliterated as a double-n: ofannó'a, a compound word literally meaning motor wheel.). See https://www.morfix.co.il/motorcycle.
I hope this helps.