Question about the 2x4's on a bunk trailer

[Silver Eagle]

I was just wondering how long should they last before replacing them.My trailer is 4 years old. They look ok .

 

[PGFISHER]

Re: Question about the 2x4's on a bunk trailer

Try shaking them when the boat is off them; they may have some rot inside that isn't visible; especially around the bolt holes. On the other hand my fresh water only bunks lasted 8 years.