Easton’s aren’t good for unicycling. The eat bearings. The design doesn’t support the bearing well. Unicycling use (upds and just hard pedaling and drops) will cause the bearings to fall apart. If you don’t notice the damaged bearing soon enough the pedal body can actually fall off the spindle when the bearing totally goes.
Wellgo sealed pedals also have the same bearing assembly style as the Easton’s. Wellgo’s are equally unreliable on a muni.
I used to have Easton’s on my muni. Had too many problems with the bearings so I switched to Atom Lab Aircorps. The Aircorps are heaven compared to the Easton’s.
I don’t know what style of bearing assembly the BPD-31 pedals have. If it’s the same as Easton and Wellgo then I’d stay away from them.