The oars used by theRondoutRower:  Dreher                                                                 

The Durham Boat Company website

Interview with Jim Dreher 

Other Vendors

Makers of the world’s finest wooden oars and paddles | Shaw and Tenney

Sawyer Paddles & Oars (paddlesandoars.com)

Other related topics

Oar specs | the Rondout Rower

The Geometry of Rowing