Only 1-1/4-inch Class II hitches are offered for the 1992 Oldsmobile 98. The reason no higher capacity 2-inch hitches are made for your car is that the frame itself does not have the strength to support more tongue weight or trailer weight.
You can use a hitch adapter like # HTAD to allow you to install your 2-inch bike rack, but note that all such adapters cause you to lose 50-percent of the hitch's rated capacity. So if you have a hitch rated for 300-lbs of tongue weight, when you use... view full answer...