I barely trust my OE specialized fork when approaching 50mph. If anything on my bike fails at that speed, I’d pretty much be lucky to die. More realistically I’d end up as a red pulp and suffer permanent consequences.
If you live in a flat area, sure, there isn’t too much risk involved. But if you plan to bomb any descents, I would do everything in my power to ease my anxiety.
What bike are you building up? Disc brake or rim?
https://www.bike-discount.de/en/buy/...saAsSpEALw_wcB
Here’s an absolutely beautiful fork from 3T. $200. 350g, tons of tire clearance and it’s even aero. Not $50 like a China fork but very reasonable imo if your bike can fit this.