And the 'six' i bought is in fact a 'nine' according to the graphics on the other side of te stem, lol. It's a 90mm and the seller anounced the weight 97gr (+-5gr). The prices was around 23 bucks with postage cost included.



Without the bolts:



All bolts:



One bolt:

I received a 100mm stem just like the OP yesterday (weight 108g) and thinking of just ordering m5x16mm ti bolts w/o washers as this would be the same amount of threads as m5x17.5mm w/ washers but lighter and cheaper. The original bolts measured closer to 17.5mm in length to me with the washers about 1.2mm in width.

So do m5 stem bolts really need washers at the head?

I used them for peace of mind.





Mine's a Uno 7 stripped with Acetone and fitted with Ti bolts and washers. After stripping, with the standard bolts it weighed 98.1g. I forgot to weigh it with the Ti bolts fitted.

That would be because it is upside down in the photo.....?

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BMC SLR02 @ 7kg
"Campagnolo; because I ride a bicycle, not a fishing rod"

Guys, these seem really nice and light.
I´ll have to buy one of these
But I´m lost with this acetone thing. Do you use it to wipe of lacquer or what?
/J

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Bontrager Race Lite 1997

Acetone is a strong solvent and not something you want to breath in so use a mask and in good ventilation. Its used to remove the graphics. I left mine on since I did not find them too offensive.

_________________
-For my next trick I will set myself on fire!
-This board and the world in general would be a much nicer place if everyone could just take themselves a little less seriously.
-Sticky Fingers John Rockefeller
-First one over the cliff wins!

Acetone isn't that bad as our bodies produce it and it is normally present in blood and urine. I wouldn't worry about a mask and don't smell it for hours inside a coffin and you'll be fine. I used nail polish remover and it took a minute or two. Also you don't need to use a lot of it.

Removing the graphics dropped .7g in weight!

Still wondering whether washers at the head are really needed.

Wow, that's dedication to the cause

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Bontrager Race Lite 1997

Could someone measure the stack height of one of these for me please?

I'm traveling right now but will be home later today and double check. If memory serves me correct its 40mm. The problem is sometimes memory does not serve me correctly.

_________________
-For my next trick I will set myself on fire!
-This board and the world in general would be a much nicer place if everyone could just take themselves a little less seriously.
-Sticky Fingers John Rockefeller
-First one over the cliff wins!

Fin, my Uno 9 is already installed. If it's possible to measure in that mode, explain exactly what the measure is and I can do that. My mass was 100.0g with screws. FWIW going from a 110mm to the 90mm helped a lot with pressure on my palms and finger numbness.

Stack height on a stem is just measuring the height of the steer clamp on the stem.

_________________
-For my next trick I will set myself on fire!
-This board and the world in general would be a much nicer place if everyone could just take themselves a little less seriously.
-Sticky Fingers John Rockefeller
-First one over the cliff wins!

Nothing wrong with your memory, it is indeed 40mm

Thanks very much. Damn, I was hoping it would be 35 or 38mm...

Just to add my 2c..

On my fitter's recommendation, thought I test a budget stem just to try out the fit.. this is the old graphics..

At the shop, I picked up two stems both marked "110mm", but even just eyeing it, I could clearly see difference in length, so I asked for a metal rule, and sure enough one was just a hair under 110mm and the other close to 120mm, so the longer one must've been miss labelled.. Not trying to put this brand/product down, but just a word of caution...



To my surprise, the weight came out lighter than I expected, 106g for a 110mm..
And with some simple 3T Ti bolts came to exactly 100g, not bad!!

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2013 BMC teammachine SLR01
2011 Giant TCR Composite 1