I've got a single chainring to install on a single speed bike. The current install is not aligned perfectly, thus there's a "high point" and "low point" while pedaling and it makes for a serious tight spot, only ridable if there is slack chain tension.

My question is, does Park or another company make a tool that helps to help align the chainring on the crankarm? Are there shims which can be used to get the chainring perfectly in the center?

If it matters, it's a Surly ring on old Suntour X-1 crankarms.

God bless you for your answers