i got some wheels that are 120mm and my frame is 130mm so i need to add spacers, and i was wondering if i can just use 5mm of washers on each side or if i need biking specific spacers. if so, where could i get those online?
I used a 120mm hub in a frame spaced at 126mm for close to two years with no problems at all. No slippage, no bending, no broken dropouts or anything like that. I didn't baby it either, the bike eventually got retired because I managed to buckle the top and down tubes. The rear triangle was still intact though.