extra long setback seatpost?
01-18-11 | 03:57 PM
#1
Thread Starter
Senior Member
Joined: Mar 2006
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extra long setback seatpost?
Hey all, I have a friend w/ some medical issues who recently acquired a tricycle type bike. Long story short, he needs to be sitting a little farther back in relation to the bottom bracket than the normal 20-30mm setback posts will allow.
Anyone know where I can find something like this in a 28.6 post?
Thanks!
John
Anyone know where I can find something like this in a 28.6 post?
Thanks!
John
01-18-11 | 04:33 PM
#2
Mad bike riding scientist
Joined: Nov 2004
Posts: 29,152
Likes: 6,209
From: Denver, CO
Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones
Hey all, I have a friend w/ some medical issues who recently acquired a tricycle type bike. Long story short, he needs to be sitting a little farther back in relation to the bottom bracket than the normal 20-30mm setback posts will allow.
Anyone know where I can find something like this in a 28.6 post?
Thanks!
John
Anyone know where I can find something like this in a 28.6 post?
Thanks!
John
I happen to have one at home. Let me check the size and I'll get back to you.
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Stuart Black
Dreamin' of Bemidji Down the Mississippi (in part)
Plan Epsilon Around Lake Michigan in the era of Covid
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Dreamin' of Bemidji Down the Mississippi (in part)
Plan Epsilon Around Lake Michigan in the era of Covid
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
01-18-11 | 06:54 PM
#3
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From: NW,Oregon Coast
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Plain seat post in needed diameter, Kalloy makes them,
Brompton Saddle adapter pin and their Penta clip saddle clip.
SAP is horizontal when installed on a standard 7/8"OD top seat post,
the stepless, mostly aluminum,
180 degree adjustable clip, will hold the saddle over the horizontal tube .
Todd at Clever Cycles in Portland does this setback mod a lot for 'dutch bike' riding postures, on your typical UJB frame .
I agree , seat post insert depth cannot be too short.
Brompton Saddle adapter pin and their Penta clip saddle clip.
SAP is horizontal when installed on a standard 7/8"OD top seat post,
the stepless, mostly aluminum,
180 degree adjustable clip, will hold the saddle over the horizontal tube .
Todd at Clever Cycles in Portland does this setback mod a lot for 'dutch bike' riding postures, on your typical UJB frame .
I agree , seat post insert depth cannot be too short.
Last edited by fietsbob; 01-18-11 at 06:59 PM.
01-18-11 | 09:47 PM
#4
Mad bike riding scientist
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From: Denver, CO
Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones
My Hellbent is a 26.8. All the right numbers but in the wrong order. Sorry.
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Stuart Black
Dreamin' of Bemidji Down the Mississippi (in part)
Plan Epsilon Around Lake Michigan in the era of Covid
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Dreamin' of Bemidji Down the Mississippi (in part)
Plan Epsilon Around Lake Michigan in the era of Covid
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
01-18-11 | 10:03 PM
#5
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Joined: Mar 2006
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Thx for checking Mr. Cycco!
Fietsbob: We already have a "plain seat post" if what you are referring to is one of the low end jobs w/ a reduced diameter @ the top end to fit a separate clamp to mount the saddle. I'll check w/ Clever Cycles to see if this is a workable solution.
Thx much for the input!
John
Fietsbob: We already have a "plain seat post" if what you are referring to is one of the low end jobs w/ a reduced diameter @ the top end to fit a separate clamp to mount the saddle. I'll check w/ Clever Cycles to see if this is a workable solution.
Thx much for the input!
John
01-18-11 | 10:11 PM
#6
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From: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
use a 28.6mm to 27.2mm shim on the one at the bottom.
45mm setback
https://www.ambrosio.co.uk/ambrosio_seatposts.htm
Alternatives: velo orange grand cru, 32mm setback or nitto wayback from riv bike, +40mm.
there was also a ritchey 45mm setback seatpost, but that was only available in 31.6mm
yet another alternative is to find a specialized saddle your friend likes, because they have a lot of rail for adjustment.
45mm setback
https://www.ambrosio.co.uk/ambrosio_seatposts.htm
Alternatives: velo orange grand cru, 32mm setback or nitto wayback from riv bike, +40mm.
there was also a ritchey 45mm setback seatpost, but that was only available in 31.6mm
yet another alternative is to find a specialized saddle your friend likes, because they have a lot of rail for adjustment.
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
01-19-11 | 08:20 AM
#7
Mad bike riding scientist
Joined: Nov 2004
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From: Denver, CO
Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones
use a 28.6mm to 27.2mm shim on the one at the bottom.
45mm setback
https://www.ambrosio.co.uk/ambrosio_seatposts.htm
Alternatives: velo orange grand cru, 32mm setback or nitto wayback from riv bike, +40mm.
there was also a ritchey 45mm setback seatpost, but that was only available in 31.6mm
yet another alternative is to find a specialized saddle your friend likes, because they have a lot of rail for adjustment.
45mm setback
https://www.ambrosio.co.uk/ambrosio_seatposts.htm
Alternatives: velo orange grand cru, 32mm setback or nitto wayback from riv bike, +40mm.
there was also a ritchey 45mm setback seatpost, but that was only available in 31.6mm
yet another alternative is to find a specialized saddle your friend likes, because they have a lot of rail for adjustment.
__________________
Stuart Black
Dreamin' of Bemidji Down the Mississippi (in part)
Plan Epsilon Around Lake Michigan in the era of Covid
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Dreamin' of Bemidji Down the Mississippi (in part)
Plan Epsilon Around Lake Michigan in the era of Covid
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
04-24-22 | 05:24 PM
#8
Senior Member
Joined: Apr 2013
Posts: 943
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From: Oz
Bikes: Curve Grovel v2 ti
Hello,
I am a former road bike rider.
I say old because I had lengthening surgery because of my obsession with short stature. (I would appreciate if you don't ask questions about this please)
My old height: 158 cm
My new height: 166 cm
Old inner leg length: 72 cm
New inner leg length: 80 cm
The operation was from the upper leg, that is, the femur.
An lengthening of +8 cm was made to the femur length.
It's a very exceptional situation, if I look at the frame size according to the length and inner leg length, it will probably be wrong because the upper body, arms, etc. short.
I wonder if it would be a fiasco if i took 50-51 size bike, you know, the arms are short.
I guess there is no solution for short arms in the big bike?
In summary, there is a situation where the femur is long but the arms are short.
If you could help with this situation, I would greatly appreciate it.
thanks
I am a former road bike rider.
I say old because I had lengthening surgery because of my obsession with short stature. (I would appreciate if you don't ask questions about this please)
My old height: 158 cm
My new height: 166 cm
Old inner leg length: 72 cm
New inner leg length: 80 cm
The operation was from the upper leg, that is, the femur.
An lengthening of +8 cm was made to the femur length.
It's a very exceptional situation, if I look at the frame size according to the length and inner leg length, it will probably be wrong because the upper body, arms, etc. short.
I wonder if it would be a fiasco if i took 50-51 size bike, you know, the arms are short.
I guess there is no solution for short arms in the big bike?
In summary, there is a situation where the femur is long but the arms are short.
If you could help with this situation, I would greatly appreciate it.
thanks
https://99spokes.com/en-AU/compare?b...;*z.47cm|w.700
The old Marin Ravenna and Marin Argenta bikes in size 47cm would fit pretty good, with something like a 45mm-or-more setback seatpost.
You can search around online and come across some very setback seaposts.
04-24-22 | 06:02 PM
#9
Senior Member
Joined: Oct 2014
Posts: 14,161
Likes: 5,288
From: Portland, OR
Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder
TiCycles could make you a seatpost of any setback and diameter. I have two 160mm setbacks in 27.2. Dave Levy is an engineer and machinist in addition to framebuilder. For his posts, he uses the excellent Thompson hardware so, like Thompsons, they are a joy to set up and dial in.
04-24-22 | 06:37 PM
#10
Mad bike riding scientist
Joined: Nov 2004
Posts: 29,152
Likes: 6,209
From: Denver, CO
Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones
You would require a frame with short reach, enough stack height to suit your position at the bars, and a very long setback seapost installed.
https://99spokes.com/en-AU/compare?b...;*z.47cm|w.700
The old Marin Ravenna and Marin Argenta bikes in size 47cm would fit pretty good, with something like a 45mm-or-more setback seatpost.
You can search around online and come across some very setback seaposts.
https://99spokes.com/en-AU/compare?b...;*z.47cm|w.700
The old Marin Ravenna and Marin Argenta bikes in size 47cm would fit pretty good, with something like a 45mm-or-more setback seatpost.
You can search around online and come across some very setback seaposts.
__________________
Stuart Black
Dreamin' of Bemidji Down the Mississippi (in part)
Plan Epsilon Around Lake Michigan in the era of Covid
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Dreamin' of Bemidji Down the Mississippi (in part)
Plan Epsilon Around Lake Michigan in the era of Covid
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
