I have a road bike (12 years old) with Campy Chorus groupo. I pull a BOB pretty much constantly as I use this as my commuter and the trailer is the best thing for my uses. Is it common to have to adjust the rear cones every couple of weeks. That's what I deal with normally. Not a big issue to do, but this seems abnormal in my mind. I've had this issue since I got the bike. The entire rear wheel has been replaced about 2 years ago with new bearings, hub and cones (I crashed!) but it's made no difference.

Thank you Oh My Gurus of the Forum!

uhh not enough torque on the locknut/cone

+1
You may have the cone right, but you need to tighten the locknut better, to keep the whole thing in place.

That's what I've always thought too, but no matter how much I crank down on that they still come loose. Locktight?

in my experience, unless cones are held tight with a special cone wrench that must be purchased at the LBS or online (and there are various sizes of these for various cones) it is impossible to tighten the locknut properly without destroying it or severely marring it. these cost about 15 bucks and it's best to take the cone to the LBS with one, otherwise one will test the patience of the LBS salesperson with one's ignorance.

no offense intended.

and if, perchance, the cone in question has been tightened properly via the proper said cone wrench. well.... just be an adult and ignore this post.

OK thanks guys. Yeah I use cone wrenches. I thought maybe the BOB had something to do with it. I'll just keep plugging away. I mean it's not a big deal to pop the wheel off and tighten them down, it just seemed I was doing often. Again, thanks.

I assume you are using two wrenchs- a cone wrench to hold the cone in its properly adjusted position and a second to tighten the lock nut? Are you saying then that after you tighten the cone and lock nut against each other the lock nut and cone loosen which results in too much play in the hub? If this description is what you are doing, I cannot understand why it loosens. I think I would try locktight as you mentioned.

Yep, Robert, that's what keeps happening. It even happened after the LBS did them. I'm wondering if the extra tension of pulling the trailer has something to do with it. I'll give the locktight a try.

My rear wheel cracked so the whole thing went to the shop anyway. They are telling me that the axle itself has stripped threads where the cones screw on giving me this problem. OK whatever. With the work this shop did this time I have my doubts, but it does make sense. Axle ordered. For some strange reason, they replace my rim with a wider one. Not happy about that at all so we still have some issues to work out.

Striped axle threads would explain it. You using solid axles? If not I would. If you had enough extra length you could maybe shift everything over on to good threads.

it does make sense though that there was some thread issues in the vicinity of the cone loosening - because otherwise no way should you keep having to retighten or use loctite - it seems as u were doing the procedure correctly w correct tools

good luck w the new wheel