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Forward recumbent bike?

Old 07-17-08, 11:42 PM
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Contour
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Forward recumbent bike?

First off I'd like to state that I have no experience in cycling or anything like that. I've just started to look into bikes and I was wondering why I haven't seen a forward recumbent bike, much like a streetbike (right term?) motorcycle. Maybe I'm searching with the wrong terms, or maybe I'm missing something painfully obvious.

http://www.rubbermag.com/news/0509/i...916_ex650a.jpg

Something like that.
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Old 07-18-08, 04:54 AM
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I don't know how much different from a regular road raceing bike that riding position is. I can tell you that cocking my head back so that I can see where I'm going is the limiting factor for how much I can lower my shoulders.
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Old 07-18-08, 05:25 AM
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You sit on that bike and let the engine do the work; on a bicycle you have to pedal. It's a whole different set of dynamics.
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Old 07-18-08, 06:00 AM
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It's been done.
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Old 07-18-08, 06:30 AM
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It's been done, but there are a couple of significant problems. one is the neck strain caused by looking where you are going. Another is that it doesn't give you anything to push against. With a traditional recumbent, you use your hips to push against, with a traditional frame you basically push against your own weight. With what you are looking for, you'd have to secure the shoulders to have something to push against. Perhaps the biggest problem is that you would be laying on your chest, restricting your ability to breath.

It's just not an efficient design.

There are several shown here.
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Old 07-18-08, 08:28 AM
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Those look sooooooo uncomfortable!
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Old 07-18-08, 08:35 AM
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Forward recumbent is an oxymoron

Originally Posted by Contour View Post
First off I'd like to state that I have no experience in cycling or anything like that. I've just started to look into bikes and I was wondering why I haven't seen a forward recumbent bike, much like a streetbike (right term?) motorcycle. Maybe I'm searching with the wrong terms, or maybe I'm missing something painfully obvious.

http://www.rubbermag.com/news/0509/i...916_ex650a.jpg

Something like that.
Forward Recumbent is an Oxymoron...
re·cum·bent
rɪˈkʌmbənt/ Pronunciation Key - Show Spelled Pronunciation[ri-kuhm-buhnt] Pronunciation Key - Show IPA Pronunciation
–adjective
1. lying down; reclining.
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Old 07-18-08, 11:13 AM
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As you can see by the photographs, yes, there is such a bike.
But there is only one of them in the whole world , and it's mine (Mine! All mine! hah, hah ha ha ha!)

Seriously, you have to build your own. The odd thing Ergonomically is that when you move your butt back on the "banana" seat, you actually find it easier to tuck in behind the fairing. I find it keeps my back flatter and I don't experience pain in the neck, like I did on drop bars of the old road bike.
There is the option of standing for hill climbing. I replaced the rear hub with a Sturmey Archer three speed hub.
In retrospect, I should have made the seat a little wider. The seat is seven inches wide at it's widest, and I should have made it 8" or 9".

This bike won a ribbon at the NYC Reliquary Museum's annual Bike Fetish Day May 10th, 2008.
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Old 07-18-08, 11:22 AM
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Another wee little problem with the prone position is that any collision is headfirst instead of feet first.
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Old 07-18-08, 12:39 PM
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Originally Posted by Contour View Post
...I've just started to look into bikes and I was wondering why I haven't seen a forward recumbent bike, much like a streetbike (right term?) motorcycle. Maybe I'm searching with the wrong terms, or maybe I'm missing something painfully obvious....
"Prone" bikes are where the rider is lying forward, as already shown.

Somebody on bentrideronline took these photos of a guy with a specially-constructed bike similar to what you describe; I don't know if there's a name for such a thing, and nobody who responded in the original thread said they had ever seen any other bike quite like it. The photographer noted that this guy appeared to be going 3-5 mph faster than anyone else around the park.
http://www.norcom2000.com/users/dcim..._backward.html
The seat is obviously not a stock component.
The cranks have extensions welded onto them; I would guess that the extensions are angled just because that was an easier way to weld a longer seam. In the original photo you can zoom in and see the weld, so the end sections don't pivot or adjust at all.
~
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Old 07-18-08, 01:07 PM
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Originally Posted by Rowan View Post
You sit on that bike and let the engine do the work; on a bicycle you have to pedal. It's a whole different set of dynamics.
I realize this, that was just an example of what I meant.

Originally Posted by twahl View Post
It's been done, but there are a couple of significant problems. one is the neck strain caused by looking where you are going. Another is that it doesn't give you anything to push against. With a traditional recumbent, you use your hips to push against, with a traditional frame you basically push against your own weight. With what you are looking for, you'd have to secure the shoulders to have something to push against. Perhaps the biggest problem is that you would be laying on your chest, restricting your ability to breath.

It's just not an efficient design.

There are several shown here.
Points taken, however you would be pushing against your hands/arms in the design depending on the angles. Which would still probably be uncomfortable.

Originally Posted by Alpha52 View Post
Forward Recumbent is an Oxymoron...
re·cum·bent
rɪˈkʌmbənt/ Pronunciation Key - Show Spelled Pronunciation[ri-kuhm-buhnt] Pronunciation Key - Show IPA Pronunciation
–adjective
1. lying down; reclining.
I sleep on my stomach.

Originally Posted by StephenH View Post
Another wee little problem with the prone position is that any collision is headfirst instead of feet first.
Wouldn't it be the same with a standard road bike?

Originally Posted by Doug5150 View Post
"Prone" bikes are where the rider is lying forward, as already shown.

Somebody on bentrideronline took these photos of a guy with a specially-constructed bike similar to what you describe; I don't know if there's a name for such a thing, and nobody who responded in the original thread said they had ever seen any other bike quite like it. The photographer noted that this guy appeared to be going 3-5 mph faster than anyone else around the park.
http://www.norcom2000.com/users/dcim..._backward.html
The seat is obviously not a stock component.
The cranks have extensions welded onto them; I would guess that the extensions are angled just because that was an easier way to weld a longer seam. In the original photo you can zoom in and see the weld, so the end sections don't pivot or adjust at all.
~
Thanks for the great information.
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Old 07-18-08, 06:25 PM
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Originally Posted by twahl View Post
It's been done, but there are a couple of significant problems. one is the neck strain caused by looking where you are going. Another is that it doesn't give you anything to push against. With a traditional recumbent, you use your hips to push against, with a traditional frame you basically push against your own weight. With what you are looking for, you'd have to secure the shoulders to have something to push against. Perhaps the biggest problem is that you would be laying on your chest, restricting your ability to breath.

It's just not an efficient design.

There are several shown here.
+ 100

OMG! Why oh why would I want to do that to my body. DF = neck and shoulder pain. 'bent = comfort like sitting in an easy chair. That 'thing' - I only see pain (for me at least).
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Old 07-18-08, 06:36 PM
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I`we seen one homemade, made some years ago. I`ll go searching for pix..

Edit: Could find pix, but the owner of this bikeshop (older man, red shirt, cigar, ponytail) made it.
http://www.sykkelverkstedet.no/dre25/

Last edited by badmother; 07-18-08 at 07:16 PM.
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Old 07-18-08, 07:00 PM
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Originally Posted by Doug5150 View Post
"Prone" bikes are where the rider is lying forward, as already shown.

Somebody on bentrideronline took these photos of a guy with a specially-constructed bike similar to what you describe; I don't know if there's a name for such a thing, and nobody who responded in the original thread said they had ever seen any other bike quite like it. The photographer noted that this guy appeared to be going 3-5 mph faster than anyone else around the park.
http://www.norcom2000.com/users/dcim..._backward.html
The seat is obviously not a stock component.
The cranks have extensions welded onto them; I would guess that the extensions are angled just because that was an easier way to weld a longer seam. In the original photo you can zoom in and see the weld, so the end sections don't pivot or adjust at all.
~
Even with the special design, his position on the bike doesn't look a whole lot different from a time trial bike.
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Old 07-18-08, 09:45 PM
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Originally Posted by Contour View Post
First off I'd like to state that I have no experience in cycling or anything like that. I've just started to look into bikes and I was wondering why I haven't seen a forward recumbent bike, much like a streetbike (right term?) motorcycle. Maybe I'm searching with the wrong terms, or maybe I'm missing something painfully obvious.

http://www.rubbermag.com/news/0509/i...916_ex650a.jpg

Something like that.
Sort of like Luge versus Cresta...
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Old 07-19-08, 12:45 AM
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Originally Posted by Cannondaler View Post
Even with the special design, his position on the bike doesn't look a whole lot different from a time trial bike.
Most TT bikes I've seen put the BB at least an inch or two in front of the seat, with a few that use true 90-degree seatpost angles. His design looks to have the BB a couple inches behind the saddle.

I would think that would make a marked difference in how the bike rode, particularly with breathing effort--but I wonder how long I'd care to sit on that seat.
~
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Old 07-21-08, 01:20 PM
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is that a kids bike?
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