Can anyone tell me if fat spokes will fit in a 19 inch Harley rim and hub

 

Stock HD spokes are 6 / 8 gauge. The bent ends are 6 gauge, nipple end 8.. You can go to a solid 6 gauge spoke easily tho you'll probably need to drill out the rim.. Going larger, I'd ask the spoke supplier. I probably not go more than 6 as the spindles are pretty spindly