How to find the right Bimini Tops AI guide

What the AI looks for in Bimini Tops

Mounting width

Measure the outside of gunwale to outside of gunwale at the exact spot where the deck hinges will sit, and buy the size range that brackets that number. Biminis are sold by width ranges, and width is the most common reason a top will not fit.

Frame height

Choose a height that clears the tallest person standing at the helm, measured from the mounting surface and not from the deck. Rails, coamings and raised mounts change the effective height, so a top that is too low hits heads and one that is too high catches wind.

Bow count and length

Three-bow tops suit most runabouts and small boats. Four-bow tops give longer shade for larger cockpits or pontoons. More bows add coverage and stiffness but also add stowed bulk and windage.

Fabric

Solution-dyed acrylic outlasts coated polyester in sun exposure. For polyester, look for marine-grade, UV-treated and coated cloth. UV fading and seam rot are what end a bimini's life, not frame failure.

Frame tube and hardware

Stainless steel tube and fittings for saltwater, or anodized aluminum for freshwater and budget builds. Match replacement parts to the existing tube diameter. Mixed or undersized hardware corrodes or flexes, and fittings only fit one tube diameter.

Included hardware

Check that the kit includes deck hinges, support straps or poles, and a storage boot. Straps or rear poles are what keep the top stable underway, and kits differ in what they include.