The Thule Spare Me 2 Bike Carrier # TH963PRO is not a fit for your Isuzu. However, the Malone Runway Spare Tire Bike Rack for 3 Bikes - Adjustable Arms, Item # MPG2148 is a confirmed fit your 1989 Isuzu Amigo so it would work well for you. I attached a review video for you to check out as well. view full answer...