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Old 01-12-10, 08:42 AM   #1
daven1986
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Just got a new stem - steerer question

Hi all,

I have just got a new stem and it fits on the steerer ok, however there is a bit of steerer left above it. I don't want to cut it so is it ok to just put a spacer on it and then replace the cap?

Thanks

Daven
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Old 01-12-10, 08:45 AM   #2
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yes.
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Old 01-12-10, 08:48 AM   #3
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Yes, but I always put my spacers under the stem first. So in this order I do it, spacer, stem, top cap.
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Old 01-12-10, 08:55 AM   #4
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Originally Posted by daven1986 View Post
Hi all,

I have just got a new stem and it fits on the steerer ok, however there is a bit of steerer left above it. I don't want to cut it so is it ok to just put a spacer on it and then replace the cap?

Thanks

Daven
A spacer above the stem doesn't hurt anything. Just make sure the spacer is about 3mm above the steer tube...just like a stem would be.
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Old 01-12-10, 09:14 AM   #5
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Oh so a stem is MEANT to be above the steerer slightly? I thought that it shouldn't as then one screw would only have 1/2 a grip on the steerer. Thanks for the help, I just went for a test ride and all seemed well
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Old 01-12-10, 09:50 AM   #6
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Oh so a stem is MEANT to be above the steerer slightly? I thought that it shouldn't as then one screw would only have 1/2 a grip on the steerer. Thanks for the help, I just went for a test ride and all seemed well
The stem should be slightly above the steer tube. 3mm is about 1/8". If the steer tube is flush with the top of the stem, the top cap can't compress the bearings in the headset properly. You'll end up with a loose headset...not a good thing.
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Old 01-12-10, 10:07 AM   #7
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Quote:
Originally Posted by cyccommute View Post
The stem should be slightly above the steer tube. 3mm is about 1/8". If the steer tube is flush with the top of the stem, the top cap can't compress the bearings in the headset properly. You'll end up with a loose headset...not a good thing.
Not quite. Something has to be above the steerer but it doesn't have to be the stem. A spacer will do fine as long as the top edge of the steerer is 2-3 mm below what ever is up there.

In fact, for carbon steerers, having the steerer project above the stem is desirable to assure the steerer fully supports the stem. Then a spacer above the stem is used to achieve the needed headset adjustment gap.
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Old 01-12-10, 10:28 AM   #8
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Cool it is around 3mm above I think. Can't be bothered to start changing around spacers right now so I will see how it goes - if I need more height to the bars I will have to change them around!
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Old 01-12-10, 11:00 AM   #9
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But more importantly, are you happy with the height of the stem? Spacers can be placed anywhere, above or below, or combination of both.
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Old 01-12-10, 11:08 AM   #10
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Quote:
Originally Posted by cyccommute View Post
The stem should be slightly above the steer tube. 3mm is about 1/8". If the steer tube is flush with the top of the stem, the top cap can't compress the bearings in the headset properly. You'll end up with a loose headset...not a good thing.
Especially if it's a carbon steerer NO part of the stem should be above the steerer. The red line is draw where the uppermost pinch bolt rests - not above the steerer. On a pro assembled floor bike there is nearly always a 5mm spacer on top of the stem before the cap.
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Old 01-12-10, 03:47 PM   #11
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Yeah height of stem seems to be ok it is lower than the old one, however it has a steeper incline so I think it may level out!
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