One of my suspension bolts came undone while I was mountain biking recently, sadly I didn't notice. I landed a big drop with only 2-3 threads left engaged, and unsurprisingly it's ruined them.
The rest of the threads (another 20 or so) are fine. It's a blind hole.
I have the right size tap to cut the thread, but I don't know if that's the right thing to do. Don't I risk being "out of sync" with the 20 good threads and causing problems with them?
I feel there should be a tap that you insert deep into the bolt hole, and it then somehow expands into the known-good threads, before being able to be wound out.
If that does exist, please let me know what it's called and where I can get one.
If it doesn't, please give me advice on how best to fix this hole with the existing tap that I have is Frame Tap