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PostPosted: Wed Nov 01, 2017 7:57 pm 
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Joined: Thu Jan 13, 2011 4:04 pm
Posts: 558
Location: Sunny UK
many seatposts have a bottom clamp whose full width contacts the saddle but with two narrow upper clamps (1). The result being a scissor type action which I've read is a no-no for carbon railed saddled.

Is there an after market top piece that will support a wider part of the rail? The best top clamps I've found is again posted below. Is there another option e.g. using a semi-circular alloy tube to cover the rail? (3)

Also re. the cylindrical top clamps as in (1) - they are thinner hence look weaker than the wider ones (3) - should I be worried about them failing?

Examples of each are below
1, narrow top clamps
Image

2. wide top clamp, much more support for rails.
Image

3. wider top clamps
Image


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PostPosted: Thu Nov 02, 2017 11:42 am 
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Joined: Mon Aug 15, 2016 10:25 am
Posts: 81
Location: Krasnoyarsk, Russia
02GF74 wrote:
The result being a scissor type action which I've read is a no-no for carbon railed saddled.

I've been running this type of clamp across several bikes (road/mtb), carbon-railed saddles and seatposts and nothing bad happened at all. A lot of other member do the same too.

02GF74 wrote:
Is there an after market top piece that will support a wider part of the rail?

Berk's seatpost will probably have one (see this post, towards the end), Jure also makes a similar custom top-clamp.

_________________
Hongfu FM079 (6.72 kg)


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Posted: Thu Nov 02, 2017 11:42 am 


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