What was the factory tire size on 87?

[MJN]

Originally Posted by bennylava

What are the characteristics of both these tire sizes? It would seem that the larger tire was considered to be an upgrade. Was there no advantage to the smaller tire?

Different tire options also impacted the GVWR since different tires have different load ratings, this load capacity guide goes into detail on front/rear spring and different wheel/tire combos and even air pressure and how it changes GVWR.
https://67-72chevytrucks.com/vboard/...d.php?t=845046
Page 42 of this PDF shows the different tire sizes that were available
https://www.gm.com/content/dam/compa...olet-Truck.pdf