I thought I was becoming a pretty good bike mechanic. I routinely buy abused vintage bikes and rebuild them from the frame up. But, this is the first time I’ve had to replace a broken axle and it has me confounded. The axle set is out of a “Sunshine Gyro-Master” 40 spoke 5spd FW hub that came off a ’79 Miyata touring bike. It appears to measure 134mm end-to-end. I could buy a replacement axle set from “Loose Screw” or others; except, it seems that the cone needs to match the bearing size and I don’t know how to determine that. The bearings are larger than the BB sized ones I’m used to. They appear slightly smaller than the quarter inch ones used in a bottom bracket with 9 per side. I tried to use an axle off a Shimano 105 hub, but to my surprise, the threads were different.
Any help would be greatly appreciated.
