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PostPosted: Mon Nov 04, 2013 8:11 pm 
Retro Guru

Joined: Wed Jun 22, 2011 5:59 pm
Posts: 291
Location: Gloucester
This is the expander one...M8 or M7?

Measured my 3T stem and it's M7...confused now.

Looking for a ti alternative.

Or...

http://www.ebay.co.uk/itm/300880451297? ... 1438.l2649

Risk of death?


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PostPosted: Tue Nov 05, 2013 12:30 pm 
Old School Grand Master
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Joined: Wed Jul 25, 2007 2:04 pm
Posts: 3364
Location: Completely in the dark, thanks to me good mate Terry....
Way2many wrote:
This is the expander one...M8 or M7?

Measured my 3T stem and it's M7...confused now.

Looking for a ti alternative.

Or...

http://www.ebay.co.uk/itm/300880451297? ... 1438.l2649

Risk of death?


From viewing steel ones for sale on eBay, ITM seem to be M7 too so that looks to be the common metric size for modern-ish quills.

Aluminium bolt? From past experience with both chainring bolts and Mavic 840 rear mech anchor bolts made of 7xxx series Ergal/Zicral type stuff, wouldn't really trust them for anything more heavy duty than water bottle cages.

David


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PostPosted: Tue Nov 05, 2013 2:50 pm 
Retro Guru
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Joined: Mon Mar 02, 2009 4:22 pm
Posts: 1481
They aren't M8 - smaller than that. Are they an imperial size maybe?

I wouldn't trust an aluminium bolt in there and I'm surprised you can even get them. Maybe if you were using it for one or two races and then replacing it, but not for every day use. Aluminium has nowhere near the tensile strength or the stiffness of steel or titanium plus it has the added disadvantage that it cumulatively fatigues with use which steel and titanium do not do.


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PostPosted: Wed Nov 06, 2013 2:02 pm 
Retro Guru

Joined: Mon Jan 15, 2007 12:12 am
Posts: 1513
Location: Gold Coast Australia
i bought a NOS ITM eclypse off ebay and the expander wedge was not threaded strangely , so i tried some grotty wedges from old stems (one was aJapanese SR) and the hole in them both was too big for the ITM


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