Meter ade sedikit offset . So kalau nak 30psi kene pump 40psi kat meter utk kereta . Utk road bike ( presto ) pump 85psi . ( Schrader ) 35psi ,Yg lainΒ² material sgt2 berbaloi size pn half compact. Sangat2 recommend da pakai pump kat kereta , roadbike , kids bike βββββπ