these bolts fit perfectly - on the bearings and depth wise in the caster block. You can tighten them a little more without worry of stripping out threads and overall play is reduced over the stock parts. Wheel clearance is better, appearance is better, assembly is easier, durability is significantly improved and the cost is practically free. Just be sure to take 5 seconds to hand file the end of the bolts just to clean them up so their is no chance of drive shaft contact.