Zero offset seat posts on road bikes
- BrownBike
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Zero offset seat posts on road bikes
Postby BrownBike » Fri Mar 28, 2014 7:06 pm
I notice that a lot of these seat posts are marketed as being for MTBs. Is there any reason for this other than MTBs usually having them? So long as the diameter and length is OK, any problem with whacking one on a carbon roadie?
Thanks for any info!
- trailgumby
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Re: Zero offset seat posts on road bikes
Postby trailgumby » Fri Mar 28, 2014 8:49 pm
The only thing to watch is seatpost diameter. 27.2 is less common these days on mountain bikes, they tend to favour 30.9 or 31.8 which may limit your choices.
I rather like Easton EC70 myself. Light, resilient, not horribly expensive.
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Re: Zero offset seat posts on road bikes
Postby eeksll » Fri Mar 28, 2014 10:02 pm
- Ross
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Re: Zero offset seat posts on road bikes
Postby Ross » Sat Mar 29, 2014 5:30 am
Not sure why most road bikes these days come with laid back posts, markeying gimick I think.
http://www.this link is broken.au/thomson-elite- ... vAodSmQAvw" onclick="window.open(this.href);return false;
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Re: Zero offset seat posts on road bikes
Postby warthog1 » Sat Mar 29, 2014 9:58 am
Ross wrote:I have a Thomson zero offset post on my bike(s). The nase model one is called Elite but you can buy a lighter, more expensive version called Masterpiece.
Not sure why most road bikes these days come with laid back posts, markeying gimick I think.
http://www.this link is broken.au/thomson-elite- ... vAodSmQAvw" onclick="window.open(this.href);return false;
I have one of those that has now outlived two frames, it's on it's third. Strong, light and secure. I highly recommend one too.
- BrownBike
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Re: Zero offset seat posts on road bikes
Postby BrownBike » Mon Mar 31, 2014 2:20 am
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Re: Zero offset seat posts on road bikes
Postby BriP » Wed Apr 02, 2014 7:07 pm
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- KGB
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Re: Zero offset seat posts on road bikes
Postby KGB » Mon Apr 07, 2014 12:47 pm
The reason for layback posts is NOT marketing. Traditionally, road bikes were a bit longer and more relaxed than the modern roadie. Longer chainstays, wheelbase and a more relaxed seat tube. Putting the rider further behind the bottom bracket has the effect of engaging the hamstrings and glutes more during the pedals stroke. Better than a very upright/forwards position that relies heavily on your quads.
Thats the theory anyway. You need to use whatever components allow you to get the correct / best / most comfortable position etc.
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Re: Zero offset seat posts on road bikes
Postby Mozzar » Mon Apr 07, 2014 12:57 pm
If you were meant to sit straight above your cranks/bb then they would have made the seat tube vertical rather then at an angle.
- mitchy_
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Re: Zero offset seat posts on road bikes
Postby mitchy_ » Mon Apr 07, 2014 1:01 pm
firstly, that all depends on how long your legs are.Mozzar wrote:I wouldn't recommend a zero offset seat post on any bike. the problem with being to far forward is that you tend to push down on your pedals to much and on fast sections tend to push yourself out of your seat loosing any efficiency. the further back max 55mm is better as you push yourself back into your seat not out of your seat.
If you were meant to sit straight above your cranks/bb then they would have made the seat tube vertical rather then at an angle.
secondly, it also comes down to bike geometry... i have the same seat to stem measurement on 2 bikes, 1 with a straight and the other a setback post.
- biker jk
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Re: Zero offset seat posts on road bikes
Postby biker jk » Mon Apr 07, 2014 2:24 pm
+ 1. I too have two bikes with the same saddle tip to bar measurement, one with a setback seatpost the other with zero setback.mitchy_ wrote:firstly, that all depends on how long your legs are.Mozzar wrote:I wouldn't recommend a zero offset seat post on any bike. the problem with being to far forward is that you tend to push down on your pedals to much and on fast sections tend to push yourself out of your seat loosing any efficiency. the further back max 55mm is better as you push yourself back into your seat not out of your seat.
If you were meant to sit straight above your cranks/bb then they would have made the seat tube vertical rather then at an angle.
secondly, it also comes down to bike geometry... i have the same seat to stem measurement on 2 bikes, 1 with a straight and the other a setback post.
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Re: Zero offset seat posts on road bikes
Postby toolonglegs » Mon Apr 07, 2014 3:55 pm
- BrownBike
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Re: Zero offset seat posts on road bikes
Postby BrownBike » Mon Apr 07, 2014 4:24 pm
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Re: Zero offset seat posts on road bikes
Postby kenwstr » Thu Apr 10, 2014 11:38 pm
What do I know, there is some fit info here: http://www.argonautcyclecoaching.com/?p ... calculator" onclick="window.open(this.href);return false;
Regards,
Ken
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Re: Zero offset seat posts on road bikes
Postby BriP » Sat Apr 12, 2014 11:29 am
yup agreed. my frame has a pretty relaxed geometry, so the zero setback compensated for the seat tube anglemitchy_ wrote:
firstly, that all depends on how long your legs are.
secondly, it also comes down to bike geometry... i have the same seat to stem measurement on 2 bikes, 1 with a straight and the other a setback post.
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