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Other Resources => Maintenance, Mechanics, & Tools => Topic started by: BeR on February 05, 2025, 10:27:03 AM

Title: Carbon rail saddle tightening torque
Post by: BeR on February 05, 2025, 10:27:03 AM

What tightening torque to do you use for these screws with a carbon rail saddle ?

Title: Re: Carbon rail saddle torque wrench
Post by: Hokum on February 05, 2025, 11:32:46 AM

I use this one and like it a lot. There's clones on Ali with different ranges (Enlee "bike torque wrench" or somesuch)
https://www.amazon.com/BIKE-HAND-YC-637-BITS-Measurement/dp/B07MVLVGJ5

Mine seems to be precise enough when measured with another wrench.


edit: my bad. 6nm usually.

Title: Re: Carbon rail saddle torque wrench
Post by: BeR on February 05, 2025, 02:27:25 PM

Quote from: Hokum on February 05, 2025, 11:32:46 AM

I use this one and like it a lot. There's clones on Ali with different ranges (Enlee "bike torque wrench" or somesuch)
https://www.amazon.com/BIKE-HAND-YC-637-BITS-Measurement/dp/B07MVLVGJ5

Mine seems to be precise enough when measured with another wrench.

I missunderstand myself : I mean tightening torque in Nm.

Title: Re: Carbon rail saddle torque wrench
Post by: SirBikealot on February 05, 2025, 03:22:15 PM

Quote from: BeR on February 05, 2025, 02:27:25 PM

I missunderstand myself : I mean tightening torque in Nm.

as i only know carbon rails are almost always? the oval ones, so on my oval rail clamp 8nm is recommended. And that is what i went for.

Title: Re: Carbon rail saddle tightening torque
Post by: jonathanf2 on February 06, 2025, 02:13:04 PM

On that style seat post clamp, I only tighten screws until they are firm. I never over tighten and make sure I apply lots of carbon paste.

Title: Re: Carbon rail saddle tightening torque
Post by: BeR on February 07, 2025, 02:44:45 PM

Quote from: jonathanf2 on February 06, 2025, 02:13:04 PM

On that style seat post clamp, I only tighten screws until they are firm. I never over tighten and make sure I apply lots of carbon paste.

I agree for carbon paste. No idea of torque in N.m ?

Title: Re: Carbon rail saddle tightening torque
Post by: ZacItaly15 on February 11, 2025, 07:29:22 AM

I don't suggest to go over 8 NM

Title: Re: Carbon rail saddle tightening torque
Post by: Ludo on February 11, 2025, 08:21:31 AM

5-8Nm is the recommended range on ELITA one seat post.
2 screw system, 5Nm seems enough for me, on 1 screw, 8Nm is needed

Title: Re: Carbon rail saddle tightening torque
Post by: BeR on February 12, 2025, 11:03:26 AM

I have just seen that Specialized suggest 3,1 N.m front and 6,1 N.m rear.

3,1 N.m seems too little.

Title: Re: Carbon rail saddle tightening torque
Post by: Ludo on February 12, 2025, 01:11:18 PM

And single bolt system at 13Nm, that looks high to me. I never venture that high!

Title: Re: Carbon rail saddle tightening torque
Post by: ZacItaly15 on February 18, 2025, 10:03:21 AM

I suggest to use some carbon paste (fibergrip) in the craddle of the seatpost