would like to make a seatpost??

Discuss light weight issues concerning mountain bikes & parts.

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whyte19
Posts: 12
Joined: Fri Aug 16, 2013 9:06 am
Location: brighton

by whyte19

hi all,i am thinking about making a lightweight seat post for my whyte19,i like the set back style post thats on there,i have searched the site and found that a few have made there own straight posts,but has anyone made a set back post??carbon tube is easy enough to find,just a bit stuck on how to make the setback part,do any of you weightweenies have some ideas,thanks for reading..

by Weenie


TheRookie
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Joined: Wed Jan 18, 2012 4:23 pm
Location: Midlands, United Kingdom

by TheRookie

Exotic carbon do the Cobra which is a full CF post rather than most CF laybacks which use a metal top section (like mine does!)
Impoverished weight weenie wanna-be!
Budget 26" HT build viewtopic.php?f=10&t=110956

whyte19
Posts: 12
Joined: Fri Aug 16, 2013 9:06 am
Location: brighton

by whyte19

TheRookie wrote:Exotic carbon do the Cobra which is a full CF post rather than most CF laybacks which use a metal top section (like mine does!)

there post looks awesome,but only 27grams lighter than what i have at the moment,ideally,i would like to half that weight,around 110 - 130grams .

TheRookie
Posts: 910
Joined: Wed Jan 18, 2012 4:23 pm
Location: Midlands, United Kingdom

by TheRookie

That's the weight penalty of the layback, it inevitably uses more material as it has a higher bending load and a larger head section, do you need the full length or can you cut it down?

I can't see you getting a layback at that weight for the above reasons, the best inline aren't much lighter and the rules of physics play a big part here.
Impoverished weight weenie wanna-be!
Budget 26" HT build viewtopic.php?f=10&t=110956

Tom-s
Posts: 144
Joined: Sat Apr 26, 2008 10:44 pm
Location: Holland/Belgium

by Tom-s

I took a Thomson Masterpiece setback with a carbon cradle, ti bolts, alloy yokes to get a light post (135g-140g for 31.6/300 setback).

DanW
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Joined: Fri May 02, 2008 5:39 pm
Location: Here, there and everywhere

by DanW

I think you will struggle to make a 110-130g setback seatpost since even the companies with the most experience and resources currently struggle too. I too am looking for a light post with around 15mm layback that doesn't cost the earth and have ended up with a tuned Thomson Masterpiece.

Maybe someone can correct me but I can not find a nice light 10-15mm layback seatpost besides a tuned Thomson Masterpiece. The MCFK comes closest but is 20mm offset and 349 Euro...

Maybe someone can help add to the list of light set back posts available? (weight in 31.6x350mm- taken from R2 Bike/ Fairwheel weights)

UPDATED WITH OTHER WEIGHTWEENIES' INPUT

AX Lightness AX2200--- 25mm offset??? --- 114g --- 467 Euro
Schmolke TLO Setback --- 25mm offset --- 116g --- 495 Euro
MCFK --- 20mm offset --- 119g --- 349 Euro
AX Lightness Daedalus--- 25mm offset??? --- 140g --- 355 Euro
New Ultimate Aluminium Setback --- 20mm??? --- 147g --- 120 Euro
Engage Revit --- 25mm offset --- 155g --- 195 Euro
Thomson Masterpiece --- 15mm offset --- 158g (w/carboncradle + ti hardware)--- 250 Euro
Crank Brother Cobalt 11 --- 20mm offset --- 180g --- 219 Euro
Ritchey Superlogic --- 25mm offset --- 181g (w/alubolt) --- 200 Euro
USE Alien Carbon --- 10mm Offset --- 188g (claimed) --- 94 Euro
Bontrager XXX --- 20mm offset --- 190g --- 160 Euro
Thomson Masterpiece --- 15mm offset --- 193g --- 175 Euro
KCNC SC Pro Lite --- 18mm offset --- 203g --- 71 Euro
ENVE --- 25mm offset --- 195g --- 280 Euro
Last edited by DanW on Mon Sep 02, 2013 12:59 pm, edited 1 time in total.

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frohrider
Posts: 57
Joined: Wed Nov 09, 2011 12:19 pm
Location: Switzerland

by frohrider

DanW wrote:Maybe someone can help add to the list of light set back posts available? (weight in 31.6x350mm- taken from R2 Bike/ Fairwheel weights) updated with some real weights

AX Lightness AX2200--- 25mm offset??? --- 114g --- 467 Euro
Schmolke TLO Setback --- 25mm offset --- 116g --- 495 Euro
MCFK --- 20mm offset --- 119g --- 349 Euro
AX Lightness Daedalus--- 25mm offset??? --- 140g --- 355 Euro
New Ultimate Aluminium Setback --- 20mm??? --- 147g --- 120 Euro
Engage Revit --- 25mm offset --- 155g --- 195 Euro
USE Alien Carbon --- 10mm Offset --- 188g (claimed) --- 94 Euro
Bontrager XXX --- 20mm offset --- 190g --- 160 Euro
Thomson Masterpiece --- 15mm offset --- 158g (w/carboncradle + ti hardware)--- 175 Euro
KCNC SC Pro Lite --- 18mm offset --- 203g --- 71 Euro
ENVE --- 25mm offset --- 195g --- 280 Euro
Crank Brother Cobalt 11 --- 20mm offset --- 180g (stock) --- 219 Euro
Ritchey Superlogic --- 25mm offset --- 181g (w/alubolt) --- 200 Euro
Supersix HiMod, Supersix EVO HiMod, Crux, CaadX, Lynskey R330 & Pro29, Yelli Screamy 29

DanW
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Joined: Fri May 02, 2008 5:39 pm
Location: Here, there and everywhere

by DanW

Cheers Frohrider :D

I have updated the original list with your weights and modified the tuned Thomson price to reflect the cost of the tuning.

I have a tuned Thomson Masterpiece but have found the rear bolt is not long enough to work well with an Alu Yoke (POP) as the nose of the saddle can not be low enough (to have the saddle around level- with the Alu Yokes it is very nose up). The threads in the original Thomson upper clamp sit almost at rail level whereas with the POP yokes the threads are above the level of the saddle rails and the bolt can not reach. Are there other yokes which work better?

To the OP: As before making your own superlight setback post in the weight range you want will be very difficult. I would have thought the easiest approach would be to copy the New Ultimate or Schmolke posts in my list

Tom-s
Posts: 144
Joined: Sat Apr 26, 2008 10:44 pm
Location: Holland/Belgium

by Tom-s

For the tuned Thomson Masterpiece with POP yokes i use the Easton EC90 Ti bolt kits for the rear yoke (those are 40 or 45mm vs normal 30mm?) and that works well.
The EC90 ti bolts have the same cone shape of the head so they work perfectly.

DanW
Posts: 1037
Joined: Fri May 02, 2008 5:39 pm
Location: Here, there and everywhere

by DanW

Thanks Tom, I knew there must have been some sort of trick like that top get these super light tuned Masterpieces up and running :)

whyte19
Posts: 12
Joined: Fri Aug 16, 2013 9:06 am
Location: brighton

by whyte19

DanW wrote:Cheers Frohrider :D

I have updated the original list with your weights and modified the tuned Thomson price to reflect the cost of the tuning.

I have a tuned Thomson Masterpiece but have found the rear bolt is not long enough to work well with an Alu Yoke (POP) as the nose of the saddle can not be low enough (to have the saddle around level- with the Alu Yokes it is very nose up). The threads in the original Thomson upper clamp sit almost at rail level whereas with the POP yokes the threads are above the level of the saddle rails and the bolt can not reach. Are there other yokes which work better?

To the OP: As before making your own superlight setback post in the weight range you want will be very difficult. I would have thought the easiest approach would be to copy the New Ultimate or Schmolke posts in my list

DanW i've been looking at the schmolke set back post,i like alot.so will have a go at something similar,and hopefully wont cost 495euro's,will post pics as i progress,carbon tube is on its way to me as i type :D

whyte19
Posts: 12
Joined: Fri Aug 16, 2013 9:06 am
Location: brighton

by whyte19

http://www.flickr.com/photos/99995515@N08/10039239586/
got tube finally,about 380mm long at the mo .will cut down,once top is done.74g at the moment,time its cut down ,maybe 10g lighter??

robgall13
Posts: 24
Joined: Mon Apr 29, 2013 2:53 am

by robgall13

Where did you source the carbon tube from? Also what diameter is it?

by Weenie


whyte19
Posts: 12
Joined: Fri Aug 16, 2013 9:06 am
Location: brighton

by whyte19

robgall13 wrote:Where did you source the carbon tube from? Also what diameter is it?

tube is 30.9,made by a friend of a friend,he makes carbon parts for F1 cars and
bikes ,so hopefully it'll be up to the job,took me long enough to get this piece,so dout i'd be able to source from him again as they are snowed under with work.
TOP piece i will fabricate,could be interesting. :D

I'm still determined to get the weight i want,and if i fail,then at least i got my hands in there and tryed.

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