This topic has been discussed many times here at RCU and many members feel the same way I do.

I use nylon bolts for certain things - like holding the wing on, not because I expect them to break in case of an accident (They won't) but only because they won't vibrate loose like a metal bolt can.

I never use them on landing gear. Here's why:

Imagine that the landing stress on the gear is rated at 1 - 10.

1 is a perfect landing on a paved runway, 7 will snap nylon bolts, and 10 will rip out the gear when held with steel bolts

Now let's look at this senario:

In the course of 50 landings, you get 30 that rate 1-6, 19 that rate 7-9 and 1 that rates a 10

That means that with nylon bolts, you will have 20 repairs (aside from replacing the bolts, don't forget how much damage can occur from the landing gear tumbling under the belly of the plane - and if you have wheel pants, there will be lots of wing damage too).

If you have steel bolts, you will have one repair job. Sure, you ripped the gear out, but 9 times out of ten that's just a matter of slapping it back in with some epoxy.