Originally Posted by
mtnbke
Maybe my first post wasn't clear enough. I have the exact size cone wrenches needed. Ultegra 6500 hubs...there isn't enough room to get both cone wrenches on at the same time. The outer locknut can only fit a cone wrench, not a regular wrench. Seems insane my thin cone wrenches are "too thick."
OK, 6500 hubs and their contemporary Dura Ace 77000-series hubs did indeed require two cone wrenches as the locknuts had thin flats like the cones. The front hub required a 13 mm cone wrench on the cone and a 14 mm cone wrench for the locknuts while the rear hub required 14 mm cone wrenches for both. I've used Park cone wrenches on my 7700 hubs with no problems. I'm still not sure you don't have an opening width mismatch rather than a thickness issue.