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 Post subject: Silly Stem Question.
PostPosted: Fri Jun 21, 2013 10:57 pm 
Old School Grand Master
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Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
Time to admit it. I need a shorter stem on the fixed. So my silly question is this.

How are stems measured? Is it from the centre of the quill bolt to the centre of the bars? Or, is it from the bolt centre to the end of the stem?

My current one measures 160mm centre to end.

Thanks.


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 Post subject: Re: Silly Stem Question.
PostPosted: Fri Jun 21, 2013 11:15 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8246
Location: Cumbria
I always assumed that it was from the centre of the top quill bolt to the centre of the bars.......... Going to have to measure one tomorrow :)

Blimey, 16cm...............can you rest your face on the top tube :)

Shaun


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 Post subject: Re: Silly Stem Question.
PostPosted: Sat Jun 22, 2013 11:06 am 
Old School Grand Master
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Joined: Thu Jul 19, 2007 7:18 pm
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Location: Staffordshire
Midlife wrote:
I always assumed that it was from the centre of the top quill bolt to the centre of the bars.......... Going to have to measure one tomorrow :)

Blimey, 16cm...............can you rest your face on the top tube :)

Shaun


Thanks Shaun. Believe it or not the bike is about right for length. I think the levers are too low on the bars. The bars also seem quite a deep drop. The main problem is fubared shoulders.

I didn't want to buy a stem that would end up way too short or so close to the old one it would make no difference. I assumed it would be measured as you seem to think it is, so that's good enough for me.

Off the the wanted section!


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 Post subject: Re: Silly Stem Question.
PostPosted: Sat Jun 22, 2013 11:21 am 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
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Location: Cumbria
Frozen shoulder / rotator cuff problems ? Tell me about it :( I spend my time "on the tops"......

Too short a stem and the elbows start to ache........is it a period build? how about stem with less of a downward angle?


Shaun


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 Post subject: Re: Silly Stem Question.
PostPosted: Sat Jun 22, 2013 11:53 am 
Retro Guru

Joined: Wed Nov 24, 2010 4:38 pm
Posts: 1470
Location: The Lovely Lincolnshire Wolds and by the sea in Sussex
I always thought it was centre to centre.

Correct stem length means when you're on the hoods the (handle)bar obscures the (wheel)hub - I'm sure it's on the hoods and not the tops!

Suppose I could always sit on a bike and check as that's how mine were always set up - mind you I was younger then!

Rk.


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 Post subject: Re: Silly Stem Question.
PostPosted: Sat Jun 22, 2013 12:10 pm 
Old School Grand Master
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Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
Here's the bike in question. Stem is 150mm measured C to C. I must admit, I'm having a blast riding it since it was geared up a bit. I do 20 ish miles twice or three times a week or so. It is the same workout as a longer ride on the geared bike gives.

Thanks for your responses.


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 Post subject: Re: Silly Stem Question.
PostPosted: Sat Jun 22, 2013 2:08 pm 
Gold Trader
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Joined: Mon Jan 15, 2007 11:40 am
Posts: 3000
Stem length is always centre of the bolt to centre of the bars, so if it measures 160 end to end then it's probably 130-ish.

Correct stem length has absolutely nothing at all to do with the bars and hub lining up - it has to do with finding the position that's comfortable for you to ride in!

I'll check that ITM later on today!


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 Post subject: Re: Silly Stem Question.
PostPosted: Sat Jun 22, 2013 3:27 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8246
Location: Cumbria
Nice track bike :)

Always a bit tricky finding a nice position if the wheelbase is short and the frame is pretty upright. My Falcon Track bike was esentially the same as that rode by Nigel Dean in the Skoll 6. Couldn't use that now :(

I've got a 130mm set aside for my Carlton build.....

Good luck in finging one :)

Shaun


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 Post subject: Re: Silly Stem Question.
PostPosted: Sun Jun 23, 2013 3:04 am 
Retro Guru
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Joined: Mon Mar 02, 2009 4:22 pm
Posts: 1482
That is a mega stem! Normally, a long quill stem is about 100mm c-to-c and a short one is 40mm.

That looks to be about a 56cm (22.5") frame. Just for a guide, I'm about 5'10 and my 56cm frame is just slightly too long for me with a 70mm stem, taking into account I have long legs and a short body.

Also - check you get the right clamp diameter for the bars.


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