The rollers of a recirculating roller way bearing are crowned convexly to distribute the loading on each roller more uniformly across the entire length thereof and thereby increase the loadbearing capacity of the roller and to reduce skewing caused by excessive and unequal loading on the ends of the roller. Straptype retainers hold the rollers in the race of the bearing without guiding the rollers as they circulate so as to leave the bearings free to align themselves in the race.