Yes and No, mostly no... Offset is the distance from the wheels mounting pad to the center line of the wheel. Back spacing is the total of the wheels center line and the offset.so what your saying is offset is the same as backspacing, My next ? is my 68 has all new parts stock suspension parts, what I want to go with 15x7 front 15x8 back torque thrust 2,s what backspacing do I want? What is stock backspacing on 68 camaro?