Motorcycle Solo Seat Spring Mounts Bobber Go to amazon.com Related posts 17 best scrambler seat motorcycle for 2022 FeatureRequires a hole to be drilled in the frame tube for the bolt to pass through.Sold as a pair.Chrome. DescriptionSolo seat spring mounts for your custom bobber project. Use with solo seat and coil springs. Bolts to 1 1/4" tubing.