I installed wet bolts on my 2006 Monty after 2 years. The cheap plastic inserts were useless and degraded to the point of no effective use. After 8 years of towing and maintenance on the original wet bolts--I replaced all of them. So, plan on a full replacement after 6-8 years of towing about 4000 miles per year. Moryde is very quiet about this issue but the alternative is worse--no RVing for me.
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