For your 1994 Olds Achieva I recommend the Thule OutWay for 3 bikes # TH56BV. This rack has a good long reach so it fits many vehicles, even ones with spoilers. It is the absolute easiest to install and remove because it uses only 2 straps instead of the 4-6 of other racks. It has adjustable arms to help accommodate non-traditional bikes like you mentioned. It also comes with locks to deter theft.
On your full suspension bike though you will need to use an adapter bar such as # 64005... view full answer...