The dimension given is for the distance between mounting surfaces when assembled.
A quick change spindle assembly is slightly heavier than a standard hub assembly, but this can be a great option if you already have wheels setup to work with quick change spindles.
Quick change nuts are included.
Feel free to reach out to us if you need custom spacers for your application.
Brian N.
The whole crew at Lowery racing are great to work with. They go above and beyond to make sure you have what you need whenever you need it! The fit and finish of thier products are second to none. I highly recommend them!