For your safety and the longevity of your Knock I would strongly recommend upgrading your stock Springer fork tubes to my thicker wall chrome molly's. You have a choice of lengths form stock to a max length of what ever you can handle going down the road. My kit comes with two new chrome molly tubes and all stainless steel hard ware for you to install. The tubes come in a bare finish ready for you to PPP them. (Paint, powder coat or plate)
For any further questions contact Joseph at firstname.lastname@example.org or 209-617-3012
You will also receive hard ware to secure your stock brake bracket form brake jacking on you for your safety.
A How to Video for you to watch.