Additional seat clamp

Discuss light weight issues concerning road bikes & parts.
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zazo
Posts: 11
Joined: Sat Aug 11, 2012 9:25 pm
Location: Slovenia

by zazo

Hey guys! I'm looking for additional clamp to hold onto a seatpost above the one on the frame.

The purpose of this would be to easily put seatpost back to the correct height after transporting bike inside a car. It seems that all clamps have the edge so they wouldnt slip off and/or are larger diameter. Is there anything like that on the market for a 27,2mm seatpost?

I know this is not a weightweenie's mindset, but i'm willing to sacrifice few grams to be sure of always having the same fit. :thanx:

by Weenie


NiFTY
Posts: 1027
Joined: Sat May 26, 2012 11:26 pm

by NiFTY

I use an el cheapo plastic light mount when using a bike box. The best part is they open wide so can be put on and removed with the seatpost installed.
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NiFTY
Posts: 1027
Joined: Sat May 26, 2012 11:26 pm

by NiFTY

Or even a reflector for seatpost will have the same plastic mount.
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Lightweenie
Posts: 152
Joined: Sun Aug 03, 2014 1:00 pm

by Lightweenie

Fizik makes some 5gr light rubber rings exactly for this purpose.

caad4rep
Posts: 15
Joined: Sun Aug 07, 2011 11:18 pm
Location: Minnesota, USA

by caad4rep

Electrical tape

NiFTY
Posts: 1027
Joined: Sat May 26, 2012 11:26 pm

by NiFTY

Rubber rings will move and the electrical tape can bunch up. The advantage of a clamp is you can push it against the lip of seat tube and tighten and when you reinstall height will be exactly right to the fraction of millimeter.
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djwalker
Posts: 165
Joined: Sat Oct 31, 2009 7:35 pm

by djwalker

Problem Solvers used to sell a double clamp (I have one). I found this online https://www.aliexpress.com/item/Bicycle ... 2822fc93ae Titanium even. Or this in carbon https://www.aliexpress.com/item/Bicycle ... 3aeAnother thing I have used in the past is a worm drive hose clamp. That's not very attractive.

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gtv18
Posts: 38
Joined: Tue Mar 15, 2016 9:46 am
Location: London, UK

by gtv18

Lightweenie wrote:Fizik makes some 5gr light rubber rings exactly for this purpose.


+1 for the Fizik rings, - my wife sometimes borrows my bike so we each have our own seatpost/saddle setup which we simply swap over.

NiFTY wrote:Rubber rings will move ....


I use the 27.2 version on a 31.6 seatpost. It is a very tight fit and does not move easily....
Last edited by gtv18 on Mon Jan 16, 2017 1:14 pm, edited 1 time in total.
Nick W.
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Fiery
Posts: 358
Joined: Sat Mar 16, 2013 9:21 am

by Fiery

BBB makes just the thing: http://bbbparts.com/en/bike-parts/clamps/BSP-97

It uses a tiny 2.5 mm allen key bolt, but that's perfectly fine for the purpose. I've been using mine for more than a year now without any problems.

KC
Posts: 100
Joined: Thu Jan 01, 2009 3:05 am

by KC

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zazo
Posts: 11
Joined: Sat Aug 11, 2012 9:25 pm
Location: Slovenia

by zazo

Fiery wrote:BBB makes just the thing: http://bbbparts.com/en/bike-parts/clamps/BSP-97

It uses a tiny 2.5 mm allen key bolt, but that's perfectly fine for the purpose. I've been using mine for more than a year now without any problems.
This BBB PostFix is exactly what I was looking for, rubber rings and electrical tape just didn't seem reliable enough. Thanks for all the suggestions.

Xico
Posts: 40
Joined: Mon May 19, 2014 10:09 pm

by Xico

I'm using this SEATPOSTSTOPPER ALU BLACK 27.2MM from TRIVIO.

6g and works fine!

mergeforthekill
Posts: 26
Joined: Fri Jun 17, 2016 1:24 am

by mergeforthekill

caad4rep wrote:Electrical tape


This is the way to go. WW approved. Hell, you could cut the tape in half long ways to make it even less visible.

UpFromOne
Posts: 644
Joined: Wed Apr 08, 2009 5:23 am
Location: Olympic Nat'l Park, WA

by UpFromOne

+1 for tape. Plus you can look at it to tell if your post ever slips.

The problem with an extra clamp is that the top surface of the seat tube is not necessarily perpendicular to that tube's angle, and so in most cases only one point on a clamp would contact the true collar, or possibly the frame itself.

by Weenie


Fiery
Posts: 358
Joined: Sat Mar 16, 2013 9:21 am

by Fiery

Even if that happens, why is it a problem? Especially if the clamp is used primarily to securely mark the sale height and buy the provide additional support.

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