1 inch quill stem bolt size?

Way2many · Nov 4, 2013

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?

David B · Nov 5, 2013

Way2many":4nzsmv0t said:
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

Jonny69 · Nov 5, 2013

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.

latman · Nov 6, 2013

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

1 inch quill stem bolt size?

Way2many

Retro Guru

David B

Old School Grand Master

Jonny69

Senior Retro Guru

latman

Senior Retro Guru

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