ISO brake caliper mount-extended version.
Fork version now available! https://www.instagram.com/p/CIoI3lEFETv/
A standard ISO disc tab. 3/16" thick. Made from 1019 steel. The edges are smooth and the part is ready to attach. No further finishing is required by the framebuilder.
This design is optimized for round, concentric frame dropouts. Other dropout designs(particularly hooded dropouts and many flat type frame dropouts) are also compatible. These ISO mounts are available in two versions. One for frames and one for forks. The frame version is optimized for 1.00” diameter dropouts and the fork version is optimized for 1.125” diameter dropouts.
Reasonable shipping costs make this a very economical part, especially if you are ordering from outside of North America.