Chinertown

Other Resources => Maintenance, Mechanics, & Tools => Topic started by: BeR on May 14, 2025, 08:14:37 AM

Title: Safety problem - High stack spacer
Post by: BeR on May 14, 2025, 08:14:37 AM
Is it safe to leave those spacers above the stem for a period ? The expandeur is long and clamp all the stem.

I know, It is awful :D.
Title: Re: Safety problem - High stack spacer
Post by: Serge_K on May 14, 2025, 08:50:28 AM
Yes. I have a long one like that myself thinking it spreads force better throughout the steerer column, into the frame. Probably overkill, but can't hurt.
As long as the stem clamps onto the steerer and there's a compression plug there so you can't crush the steerer, the plug is doing its job.
Title: Re: Safety problem - High stack spacer
Post by: 00Garza on May 14, 2025, 10:13:59 AM
Ever since I learned how much steerer tubes deform from stem clamping I also use those long expanders. No issues even when I had some spacers above stem working out my fit.

https://youtu.be/8bSnbjHiFXc?si=Yfnk55uRRVly3YDB
Title: Re: Safety problem - High stack spacer
Post by: jonathanf2 on May 14, 2025, 11:07:09 AM
Is it safe to leave those spacers above the stem for a period ? The expandeur is long and clamp all the stem.

I know, It is awful :D.

Are you testing a lower stem height? I think you should be fine especially since you're using a long compression plug.
Title: Re: Safety problem - High stack spacer
Post by: BeR on May 14, 2025, 11:34:31 AM
Are you testing a lower stem height? I think you should be fine especially since you're using a long compression plug.

Yes, but I believe that it will be my finale height.
Title: Re: Safety problem - High stack spacer
Post by: glepore on May 14, 2025, 01:05:01 PM
It'll likely be fine with the long plug. Specialized would groan as they supply a long plug to go below the headset bearing due to issues they had early on with the sl7 and specify no more than 35mm of spacers for the sl8 fork now. But the consensus seems to be that the switch to a composite compression ring from metal solved the fork problem and that an expander that just supports the clamp area is likely ok.