An adult-size 450cc dirt bike is usually about 3′ wide (including the handlebars) and 7′ long. In this case, you’d load the bikes vertically (running the length of the trailer). You can fit two dirt bikes in a simple 5′ x 8′ trailer. If you’re using an open trailer, you may actually need a slightly larger space because of the need for tie downs reaching out front and back since you may not have a solid side rail to lean up against. For me, that’s far more convenient because you can store your gear without worrying about it blowing off the trailer, the bikes can rest against the sides for extra support, and you don’t have to unload them when you get home. In this post, I’m assuming that you’re purchasing an enclosed trailer for your dirt bikes. You could also fit 5 adult bikes in that space, but it would obviously be tighter. Given that some of the bikes are smaller kids bikes, a 6×12 easily fits what we need if we load the bikes diagonally. We need 4 dirt bikes right now (me, my wife, and two boys) and we’ll eventually have another dirt rider when my little girl (now 1-year-old) starts to ride. In the end, I decided to buy a 6×12′ dirt bike trailer for my family.

That’s a lot of lost money, so hopefully, this post can help you make the right decision the first time. As I looked through Craigslist, I couldn’t help but notice the high number of postings from people who bought a trailer that same week and were selling it because it didn’t fit their number of dirt bikes/atvs, or it didn’t fit in the space next to their house, etc. I have spent the last few weeks researching dirt bike trailers. This is a 6×12′ enclosed trailer for dirt bikes. As an Amazon Associate earns from qualifying purchases.

Whatsize trailer for four fourwheelers