Set-Forward Seapost???
03-12-09 | 11:54 AM
#1
Thread Starter
Senior Member
Joined: Jul 2007
Posts: 1,213
Likes: 1
From: San Jose, Ca
Bikes: 09 Specialized Tricross Sport
Set-Forward Seapost???
My criteria:
The criteria rules out the Thomson seatposts (only 16mm offset) and the Profile Design Fast Forward (way too short).
- more than 16mm of forward offset
- at least 300mm length
- within $100, or at least within $150
- aluminum, if possible
The criteria rules out the Thomson seatposts (only 16mm offset) and the Profile Design Fast Forward (way too short).
03-12-09 | 07:55 PM
#4
Thread Starter
Senior Member
Joined: Jul 2007
Posts: 1,213
Likes: 1
From: San Jose, Ca
Bikes: 09 Specialized Tricross Sport
^^ My eternal gratitude, for not telling me which ones. And for performing the all-important task of amusing yourself.
Capt,
This would be for a road bike, a Giant Defy Advanced which in my size has a 72* seat tube angle. I like to keep my knee over the pedal spindle and with that STA, I should be able to do it with the Thomson Elite and my currently-preferred saddle but if I later went to a different saddle, one that positioned me farther back, I would need a seatpost to push me forward, probably more than 16mm.
Capt,
This would be for a road bike, a Giant Defy Advanced which in my size has a 72* seat tube angle. I like to keep my knee over the pedal spindle and with that STA, I should be able to do it with the Thomson Elite and my currently-preferred saddle but if I later went to a different saddle, one that positioned me farther back, I would need a seatpost to push me forward, probably more than 16mm.
03-13-09 | 07:08 PM
#6
It's ALL base...
Joined: Aug 2006
Posts: 6,716
Likes: 1
From: Los Angeles
I was serious. I have no idea how what the specs are of different seatposts and saddle rails, but you'll know pretty quick what will give you the range you want. I was messing with my Time seatpost/Toupe saddle combo and turned it around, succesfully giving me lots more forward range for my saddle.
It did put the forward screw up pretty high, almost sticking up far enough to snag my bibs through the saddle cutout, but it would have worked OK. I discovered that I put out more power with my saddle further back anyway, so back it went.
So does this mean I don't win anything? I do crack me up sometimes...
It did put the forward screw up pretty high, almost sticking up far enough to snag my bibs through the saddle cutout, but it would have worked OK. I discovered that I put out more power with my saddle further back anyway, so back it went.
So does this mean I don't win anything? I do crack me up sometimes...
03-13-09 | 07:24 PM
#7
Banned
Joined: Feb 2009
Posts: 1,914
Likes: 0
From: Painville, USA
Bikes: 2007 Tarmac Pro
^^ My eternal gratitude, for not telling me which ones. And for performing the all-important task of amusing yourself.
Capt,
This would be for a road bike, a Giant Defy Advanced which in my size has a 72* seat tube angle. I like to keep my knee over the pedal spindle and with that STA, I should be able to do it with the Thomson Elite and my currently-preferred saddle but if I later went to a different saddle, one that positioned me farther back, I would need a seatpost to push me forward, probably more than 16mm.
Capt,
This would be for a road bike, a Giant Defy Advanced which in my size has a 72* seat tube angle. I like to keep my knee over the pedal spindle and with that STA, I should be able to do it with the Thomson Elite and my currently-preferred saddle but if I later went to a different saddle, one that positioned me farther back, I would need a seatpost to push me forward, probably more than 16mm.
I've never seen a case where a properly-fitted rider couldn't get KOPS with, at most, a zero offset post. Maybe your upper legs are unusually short?
03-13-09 | 08:26 PM
#8
Thread Starter
Senior Member
Joined: Jul 2007
Posts: 1,213
Likes: 1
From: San Jose, Ca
Bikes: 09 Specialized Tricross Sport
Put differently, with a 73* or greater STA, I might be able to reverse a conventional post but I wouldn't need to because with a 10mm setback post, I have KOPS. It's with a more lax STA that I have trouble getting the saddle forward enough.
BTW I used a zero-offset post on my cross bike. Seems to be working.
I don't know if my femurs are short but at 6'1" I do use 175mm cranks, with 8cm saddle setback, and I wouldn't want to go smaller as I like the leverage they give me when I"m out of saddle.
The bike fitter actually told me to "use 177.5 cranks if you can get em"
03-14-09 | 09:25 PM
#10
Rice Baker
Joined: Feb 2008
Posts: 566
Likes: 3
From: socal
Here's what I found:
Aluminum but only 270mm:
https://www.ebikestop.com/profile_fas...0mm-ST1411.php
Carbon, 300mm:
https://www.modernbike.com/itemgroup....176177&TID=367
Aluminum but only 270mm:
https://www.ebikestop.com/profile_fas...0mm-ST1411.php
Carbon, 300mm:
https://www.modernbike.com/itemgroup....176177&TID=367
03-15-09 | 09:08 AM
#12
Senior Member
Joined: Sep 2008
Posts: 7,296
Likes: 576
From: Loveland, CO
Bikes: Cervelo Rouvida x 2
I'd stop chasing KOP. Weight balance over the saddle is more important. Quite often, KOP is too far forward, placing too much weight on the hands. Then the typical LBS solution is higher bars and a shorter stem.
https://www.peterwhitecycles.com/fitting.htm
https://www.peterwhitecycles.com/fitting.htm
