Used bike I purchased came with Woody's wheels. While changing tires from a 90-10 road to a 50-50 Hideneau setup, I found multiple stress fractures at the dimples on both front and rear excel rims? What would cause this ( guy before me had road tires on the bike ) and my best option now is to ...........? Woody's doesn't think they can get the silicone off the nipples so they want to replace spokes and nipples ( $$$$ ), so I'm thinking a do it yourself project and buy new rims. I have a 2.5 x 19 on front and 4.25 x 17 rear.