Do you know if the dimensions are based on the 86-87 hubs or the 88-89's? I see there 3 bolt like the 88-89 but are styled like the 86-87..... Reason I ask is the 88-89 hubs have a 3/8" offset compared to 86-87 hubs so if you run 88-89 hubs/spindles on an 86-87 yor get an extra 3/4" width. I have some LSR micro-lites on my 86 which take the 4 bolt rotor but they have the 3/8" wider offset like the 88-89 oem hubs.