Cross threaded rear derailleur barrel adjuster

alex222

Have been very stupid and managed to completely unscrew the barrel adjuster on my rear derailleur. Can't get it back in and looking more closely it looks like I have cross threaded the rear derailleur element.

So question is do people think that I will need to buy a new rear derailleur or is it possible a mechanic would be able to rectify the situation?

I'll have to notch this up as another lesson in my path to improved bike maintenance.
Thanks

ElectronShepherd

Derailleur bodies are usually made from a relatively soft alloy, so I would think you could re-chase the thread with a suitable tap.

trailflow

Can you get it some way in at all ? If you can and it will hold a cable ferrule securely, you can add an inline barrel adjuster to the outer cable near the shift lever.

alex222

Thanks for the replies.
Spent most of last night trying to get it back in, but to no avail.
Will try and borrow a tap kit off a mate but I think it's probably a lost cause. Fortunately it's on my winter bike so cheaper components.

Monty Dog

See if you can screw the tap in from the back-side to chase-it through

dgunthor

a tap could well fix it or as someone else mentioned, you could drill the hole a little wider to accept a ferrule (about 5 to 6mm deep, not all the way through) and use an inline barrel adjuster nearer the handlebars

alex222

dgunthor wrote:

a tap could well fix it or as someone else mentioned, you could drill the hole a little wider to accept a ferrule (about 5 to 6mm deep, not all the way through) and use an inline barrel adjuster nearer the handlebars

Unfortunately having asked around no one I know has a tap set. So in the end just ordered a new rear meach, due today.
Thought that if I buy a tap set my limited skills will probably mean I fail to fix it and waste some more money, plus it means the bike is off the road / turbo trainer for longer. Also I am guessing the cost of taking it to a shop will be as much as a new part would cost.

Have also justified it to myself by upgrading the derailleur from Tiagra to 105 as there was only a £3 difference. Not that I expect to notice any difference

rolf_f

Alex222 wrote:

dgunthor wrote:

a tap could well fix it or as someone else mentioned, you could drill the hole a little wider to accept a ferrule (about 5 to 6mm deep, not all the way through) and use an inline barrel adjuster nearer the handlebars

Unfortunately having asked around no one I know has a tap set. So in the end just ordered a new rear meach, due today.
Thought that if I buy a tap set my limited skills will probably mean I fail to fix it and waste some more money, plus it means the bike is off the road / turbo trainer for longer. Also I am guessing the cost of taking it to a shop will be as much as a new part would cost.

Have also justified it to myself by upgrading the derailleur from Tiagra to 105 as there was only a £3 difference. Not that I expect to notice any difference

heaper would be to have put a barrel adjuster in between the shifter and the cable stop. My old Centaur re mech lost the thread of its adjuster ages ago and lasted many thousand more miles just held in place by the outer with adjustments done via the barrel adjuster. Mildly less convenient, that's all!