While I am sure the provided hinge bolts are more than strong enough for the job, I wanted more bearing surface to reduce wear over time. I went with ¼ inch bolts inserted through nylon bearing sleeves. I drilled a slightly oversize holes, epoxied them, redrilled and pressed in the bearing sleeves. It operates very smoothly. The sleeves are cheap and easily replace when the time comes. Of course one could just get sleeves the size of the supplied hinge bolts.