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PostPosted: Sat Oct 05, 2013 4:41 pm 
Old School Hero

Joined: Thu Jul 05, 2012 10:38 pm
Posts: 151
Location: Nijmegen
I'm mighty pleased with my most recent purchase (m series 'Dale from 1993). But as always there is something new to deal with and learn about ... :-)

It seems to me that the headset that is fitted is just too "tall". There's just not enough stem sticking through for the lock nut to securely screw on to. The bike had been well used with this headset though. Seems like the threads on the stem seem fine but the bottom few threads on the lock nut (that were screwed on to the stem) are worn out.

I want to order a new headset, but want to make sure I order one that will fit the stem. What dimensions should I be looking out for, other than the usual 1 1/8th sizing etc?


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PostPosted: Sat Oct 05, 2013 4:42 pm 
Old School Hero

Joined: Thu Jul 05, 2012 10:38 pm
Posts: 151
Location: Nijmegen
Picture ...
Image


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PostPosted: Sat Oct 05, 2013 4:55 pm 
Gold Trader
Gold Trader

Joined: Wed Feb 04, 2009 9:40 pm
Posts: 2164
Location: Nottingham
It LOOKS to me as if sufficient threading for a lock nut if ITS threading is in good condition. Other than that, you need to work out stack height (see http://sheldonbrown.com/gloss_st-z.html) of current kit and buy one that is "shorter".


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PostPosted: Sat Oct 05, 2013 5:42 pm 
Old School Hero

Joined: Thu Jul 05, 2012 10:38 pm
Posts: 151
Location: Nijmegen
Thanks! That helps ... now I know the term to start googling for (stack height) :-)


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PostPosted: Sat Oct 05, 2013 5:50 pm 
rBoTM Winner
rBoTM Winner
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Joined: Wed Dec 12, 2012 10:18 pm
Posts: 2373
Location: California
Track headsets have a very low stack height.


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PostPosted: Sat Oct 05, 2013 7:10 pm 
Retro Guru
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Joined: Tue Jan 03, 2012 7:52 pm
Posts: 1387
Location: the Netherlands
To me that looks like you have enough thread for a normal locknut. You could source a separate locknut if your current one has messed up thread. Otherwise, as mentioned earlier, go for a headset with a low stack height. Tioga Avenger headsets have an incredibly low stack height, they helped me to solve a similar issues as you currently face.


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PostPosted: Sun Oct 06, 2013 7:01 pm 
Old School Hero

Joined: Thu Jul 05, 2012 10:38 pm
Posts: 151
Location: Nijmegen
Thanks for the advice. I'll hunt around to see if I can dig out a thinner lock nut ... otherwise looks like I need to hit eBay (btw the current fitted unit has a large recessed washer about half the depth of the available thread)


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