Caliper reach for mtb conversion suggestions?

[Decker_]

I'm working on converting a non-suspension early mtb frame to a touring-gravel bike and would appreciate any assistance on a braking system for 700 wheels on it. Wheels fit the frame fine so the issue is caliper arm reach. Tektro r559 reaches to 73mm, which is about what I need. Any suggestions here appreciated. Thank you!, -Decker

[PacNW2Ford]

If the frame has cantilever posts, the Paul Moto BMX brakes will allow 700c wheels on 26" wheel frame.

[Decker_]

A friend had suggested bmx brakes too. These Paul ones look like a great way to go so may give them a try. Was looking at the extracycle adapter too. Thanks for the suggestion!