Slipping axle & horizontal dropouts
I have a recurring problem with a slipping axle on my 1978 Trek 400. The wheelset and axle are new 130mm Dura Ace. I’ve used both Shimano Ultegra and Velo Orange quick release bolts. Both slip. The rear drop-out was professionally cold set to 130mm, using the correct Park tool to set the rear triangle.
The axle slips forward as I accelerate from a stop. Since I’m clipped-in, I fall each time. Not only is falling an issue, I’m concerned I’ll fall among vehicles that are within striking distance.
Any suggestions? I’m ready to buy a frame with vertical drop-outs.