Play in Headset

[Kalahari Vegmot]

How else would you preload the the headset, exactly?

[GrahamS2]

56798-largest_02_5mm_spacer.jpg

And what if your bike fit requires that spacer to be under the stem?

[droo]

And what if your bike fit requires that spacer to be under the stem?

 

If the top of the steerer is above the top stem bolt, then you're good. Conventional wisdom says 2 - 3mm below the top of the stem is fine.

 

If not, you've cut your steerer too short. Which is expensive.

[Simon Kolin]

Refer to post #22

What exactly am I supposed to reference in post #22?

 

I replied to your comment in post #26 "The stem should't ever stick out above the steerer tube." which was incomplete and inaccurate advice.

[GrahamS2]

If the top of the steerer is above the top stem bolt, then you're good. Conventional wisdom says 2 - 3mm below the top of the stem is fine.

 

If not, you've cut your steerer too short. Which is expensive.

Yeah that's what I'm getting at. I'm wondering why the insistence that there must be a spacer above the stem. It's illogical.

[Kalahari Vegmot]

What exactly am I supposed to reference in post #22?

 

I replied to your comment in post #26 "The stem should't ever stick out above the steerer tube." which was incomplete and inaccurate advice.

It shouldn't. It's bad practice IMO.

[Simon Kolin]

It shouldn't. It's bad practice IMO.

Fair enough. It's your option, but factually incorrect.

 

It is very acceptable to have a steerer tube pass above the top of the stem, with the provision that there is enough length of the steerer to add x spacers AND then allow a 2-3mm gap for the top-cap to sit into.

[GrahamS2]

It shouldn't. It's bad practice IMO.

Based on what?

[Sepia]

I am now totally and utterly confused as to the actual problem.

[Simon Kolin]

Yeah that's what I'm getting at. I'm wondering why the insistence that there must be a spacer above the stem. It's illogical.

It could be suggested that this method would allow the stem clamp to tighten around a cylinder (steerer tube) of consistent diameter. This may prevent damage to carbon steerer tubes. e.g. delaminating of fibres if the top stem bolt is allowed to be too tight

[GrahamS2]

It could be suggested that this method would allow the stem clamp to tighten around a cylinder (steerer tube) of consistent diameter. This may prevent damage to carbon steerer tubes. e.g. delaminating of fibres if the top stem bolt is allowed to be too tight

Carbon steerers are another story, especially if they are cut badly. But the clamping force required to crush a tube with 2-3mm wall thickness is considerable. Even more so for alu.

[Mojoman]

56798-largest_02_5mm_spacer.jpg

Is there not a stepped spacer of sorts available for something like this? So it would sit on top of the spacer and the stepped section would press down on the steerer tube?

[AlanD]

Are you using the nukeproof cup? If it's still an fsa/giant cup the bearing and the rest of the top cap assembly might not sit flush like with the nukeproof cup.

Yes, replaced the whole headset so both are nukeproof.

[AlanD]

Did you clean your new fork before installing the stem?

The local LBS installed the headset and fork so cant say if they cleaned it.

[Kalahari Vegmot]

Is there not a stepped spacer of sorts available for something like this? So it would sit on top of the spacer and the stepped section would press down on the steerer tube?

What would be the purpose of such a stepped spacer?

[Mojoman]

What would be the purpose of such a stepped spacer?

My bad, I was thinking of something else and didn't look carefully...