Discussion Starter · #1 ·
Question for you composite experts: would it be reasonable to drill a ~7mm hole on the inside of each fork leg to bond in an M5 rivnut? I need to add some fender mounts.
Here’s the long story if you care: I built myself a gravel frame and was planning to build a matching steel fork. My old Henry James frame jig supposedly had the capability to build forks too. Well, it can if all I ever wanted to build was a 380mm A to C lugged fork that will barely clear a 23mm tire. That’s not helpful. Sure, I could build a new fork jig, but I wanted to ride my new frame—now. Found this sweet carbon fork from Bearclaw Bicycles that was really close to the steel fork I was planning—only a few mm different A to C and offset was perfect. The pic on the website showed fender mounts on the lower legs, so I pulled the trigger. It wasn’t cheap, but it fit all my design criteria and was going to be much lighter and probably ride nicer than the steel fork. However, when I unboxed it there were no lower fender mounts. I’ve emailed Bearclaw to see what can be done on their end, but haven’t heard back yet.
If worse comes to worse, can I put threaded inserts in? I know it will void the warranty, don’t really care. I do care about my teeth, though. I’m just not familiar enough with composites to know if this is an okay idea or if there’s a high probability of fork failure.