Carbon Seat Rails.
04-14-24, 06:46 PM
#26
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btw, 2-3nm seems like a very low torque for a saddle clamp; is that Bontrager's spec?
04-14-24, 08:25 PM
#27
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Obviously not relevant to the thread's original post, since it describes something that obviously did not happen with your saddle; in fact, I can't really see any failure in the photo. Am I missing something? I feel like there must be a crack somewhere that I'm not seeing.
btw, 2-3nm seems like a very low torque for a saddle clamp; is that Bontrager's spec?
btw, 2-3nm seems like a very low torque for a saddle clamp; is that Bontrager's spec?
I read in the instructions to tighten to 4 nm but what ‘felt’ right to me was 2-3 nm. I’m patiently waiting for the cracks to form and the saddle to fall off.
04-14-24, 08:30 PM
#28
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It sounds like you are accusing me of being incapable of breaking something. Well, guilty as charged, but I do have great aspirations.
I read in the instructions to tighten to 4 nm but what ‘felt’ right to me was 2-3 nm. I’m patiently waiting for the cracks to form and the saddle to fall off.
I read in the instructions to tighten to 4 nm but what ‘felt’ right to me was 2-3 nm. I’m patiently waiting for the cracks to form and the saddle to fall off.
I would torque it to spec, especially since even 4nm isn't much. But you're probably fine.
04-14-24, 09:31 PM
#29
Clark W. Griswold
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My carbon railed C13 (technically a 17 in width) has supported my more ample rear for many years and is still going strong. It is installed on a Ritchey Classic post and was done properly with a torque wrench. I do occasionally worry about it and would prefer it to be titanium but it was carbon and works fine. So long as you have the correct clamping mechanism for the saddle (check with the manufacturer) and you torque it all properly and don't ride like a maniac you will be fine.
Carbon is quite a strong resilient material. If it wasn't they wouldn't be using it in all the various critical applications they use it in. I know it is easy to hate on carbon certainly it can fail terribly but so can many materials if treated poorly in some way or another.
Carbon is quite a strong resilient material. If it wasn't they wouldn't be using it in all the various critical applications they use it in. I know it is easy to hate on carbon certainly it can fail terribly but so can many materials if treated poorly in some way or another.
04-14-24, 09:54 PM
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04-14-24, 10:44 PM
#31
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The left clamp is what I was asking about in my earlier post. The clamp edge being into the start of the turn of the rails. CF doesn't "flow" at all so the concentrated force at that clamp edge will never dissipate. I asked the OP if this was the case so we could all learn but I suspect the hostile replies drove him off.
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04-15-24, 07:18 AM
#32
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No it is the designation from Brooks, they have the C13, C15, C17 and C19. If my rear was that big I would have problems and I doubt I could use a carbon railed saddle or probably most any saddle at that point.
