|
|
| General General Bicycling discussions here. |
Welcome to the CleanMPG forums.
Some posts may describe situations which may in some cases be unsafe or illegal in some jurisdictions. Please use common sense and consult your local laws to make sure you do not hurt yourself or others or break any laws. You are currently viewing our boards as a guest which gives you limited access to view discussions, articles and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload your own photos and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact contact support.
|
Crank-forward bicycling.
 |
|

08-11-2009, 03:04 PM
|
 |
Senior Member
|
|
Join Date: Feb 2008
Vehicles: 2010 Prius II
Location: MO
Posts: 300
|
|
|
Re: Crank-forward bicycling.
Slower up hills on a recumbent is certainly true for most people. The danger of mashing pedals with your back pressed against the seat on a recumbent up hills is damaging your knees. In my experience, similarly capable riders on a DF are faster up hills than those on a recumbent. You have to spin a little faster to protect those knees.
Being able to stand up on a bike like the Citi is definately helpful.
|

08-11-2009, 03:41 PM
|
 |
Half a Bubble Off Plumb
|
|
Join Date: Mar 2009
Vehicles: 2009 Toyota Yaris Sedan, 4 sp. automatic, 1998 Mercury Villager
Location: Bristol, Tennessee, USA
Posts: 232
|
|
Re: Crank-forward bicycling.
Standing is great for a short burst up a short hill. You don't want to do it for long.
__________________
A cheerful heart is good medicine.
|

08-11-2009, 07:09 PM
|
 |
Veteran
|
|
Join Date: Jun 2008
Location: Eagan, MN
Posts: 1,037
|
|
|
Re: Crank-forward bicycling.
My Wife just got a used recumbent bike, and we finaly took a weekend bike vacation with it. she loved it.
She just shifted into LOW for the hills and went up slow. she is not one for pushing it hard anyway, so going slow up hills was just fine with her.
__________________
-Allen
|

08-12-2009, 10:06 PM
|
 |
Half a Bubble Off Plumb
|
|
Join Date: Mar 2009
Vehicles: 2009 Toyota Yaris Sedan, 4 sp. automatic, 1998 Mercury Villager
Location: Bristol, Tennessee, USA
Posts: 232
|
|
Re: Crank-forward bicycling.
That's the way to do it.
__________________
A cheerful heart is good medicine.
|

08-14-2009, 05:01 PM
|
|
Moderator
|
|
Join Date: May 2007
Vehicles: '11 Elantra Touring, '00 bioTDI Golf, Bikes, Light Rail
Location: Portland, OR
Posts: 5,302
|
|
|
Re: Crank-forward bicycling.
I think we need to be careful about extrapolating from our own experiences and assuming that what works (or doesn't) for us will be the same for everyone else.
That said, my experiences have been:
- Due to my dimensions I'm a slow climber even on upright bikes, and I'm quite a bit slower on all the recumbents I've tried. I've heard some longtime 'bent riders say that's only because I haven't developed the muscles for it, and that may well be so.
- I never liked any of the LWB 'bents I test rode. Others love them.
- Of the SWB 'bents, I greatly preferred the Bacchetta Giro 20/26 over anything else I tried. The 26/26 model wasn't out yet, but I got foot numbness with the other high-BB 'bents that I tried, so I'm not sure it would work for me. If I were getting a recument now there's no question I would simply get a Giro 20/26 and be done shopping.
- On a CF bike, I climb as fast or faster when seated than when on an upright bike -- and a LOT faster than on a recumbent.
- It may be possible to stand out of the saddle on a Citi/Fusion, but I was not able do so with any kind of stability on the Fusion that I tried. I was able to do so on a Hammertruck, which has the same front end geometry as the Dynamik/700x.
- As a longtime singlespeed mountain biker, I am able to stand out of the saddle for extended periods, and the ability to switch back and forth between seated and standing every couple of minutes greatly improves my time up the hill.
Those are my experiences. Your mileage may -- no, will -- vary. Others may not have the same experience, but that doesn't make my experience wrong.
Last edited by WriConsult : 08-14-2009 at 06:19 PM.
|

08-14-2009, 06:17 PM
|
|
Moderator
|
|
Join Date: May 2007
Vehicles: '11 Elantra Touring, '00 bioTDI Golf, Bikes, Light Rail
Location: Portland, OR
Posts: 5,302
|
|
|
Re: Crank-forward bicycling.
By the way, I'm not ready to buy a CF yet, but over the next few months I'll be doing some experiments with my existing bikes to see how moving the saddle (and, of course, handlebars) way back works for me on longer rides.
Last night I took a Thudbuster seatpost (a parallelogram design where the saddle moves back as much as down on compression, not the telescoping kind of seatpost), removed one of the two elastomers and installed a shorter bolt. This places the seat clamp nearly 3" behind where it would be on a conventional seatpost, putting me close to crank forward territory. I'll start doing some commuting and recreational riding on this setup and see how I like it.
|

08-14-2009, 07:42 PM
|
 |
Veteran
|
|
Join Date: Jun 2008
Location: Eagan, MN
Posts: 1,037
|
|
|
Re: Crank-forward bicycling.
Speaking about seating position (upright or crank forward).
Proper seat distance from the pedals Makes a huge difference.
When using your toe (and ball of your foot) to push the pedal your knee should be only slightly bent once you have pushed the pedal to its furthest position.
To short of a distance:
If you can touch the ground while sitting on the seat of an upright bike your bike is NOT adjusted properly.
Pedaling without enough leg extension is hard on your knees and will tire you out sooner.
To long of a distance:
If when pedaling your leg goes straight (knee no longer bent) you will not be getting good force on the pedal, and you will tire sooner.
Using the toe and ball of your foot to push the pedal will also allow you to use your calf muscles to help pedal. Note: it will feel odd if you have always been pedaling with the bottom/arch of your foot. Your calf muscles may even get sore until your used to pedaling with your toes.
My wife did not want to believe this, even with a friend of ours with bad knees told her the same thing.
She just would not let me to put her upright bike seat high enough. When she started riding the recumbent she wanted the seat at the distance she was used to. When we went on our 1st long ride with the recumbent I did not say anything until she started getting tired, then I suggested we move the seat back a bit. After a few minutes of pedaling she let me know the extra leg extension was helping a lot. She was pedaling easier and her knees had stopped hurting.
__________________
-Allen
|

08-14-2009, 08:01 PM
|
 |
Be Inspired
|
|
Join Date: Mar 2008
Vehicles: 1999 Dodge Avenger, 1997 Mitsubishi Eclipse 5sp
Location: Schenectady, NY
Posts: 6,182
|
|
|
Re: Crank-forward bicycling.
Quote:
Originally Posted by abcdpeterson
Speaking about seating position (upright or crank forward).
Proper seat distance from the pedals Makes a huge difference.
When using your toe (and ball of your foot) to push the pedal your knee should be only slightly bent once you have pushed the pedal to its furthest position.
To short of a distance:
If you can touch the ground while sitting on the seat of an upright bike your bike is NOT adjusted properly.
Pedaling without enough leg extension is hard on your knees and will tire you out sooner.
To long of a distance:
If when pedaling your leg goes straight (knee no longer bent) you will not be getting good force on the pedal, and you will tire sooner.
Using the toe and ball of your foot to push the pedal will also allow you to use your calf muscles to help pedal. Note: it will feel odd if you have always been pedaling with the bottom/arch of your foot. Your calf muscles may even get sore until your used to pedaling with your toes.
My wife did not want to believe this, even with a friend of ours with bad knees told her the same thing.
She just would not let me to put her upright bike seat high enough. When she started riding the recumbent she wanted the seat at the distance she was used to. When we went on our 1st long ride with the recumbent I did not say anything until she started getting tired, then I suggested we move the seat back a bit. After a few minutes of pedaling she let me know the extra leg extension was helping a lot. She was pedaling easier and her knees had stopped hurting.
|
You are exactly correct and this is true in all senses.
Different bikers however, have different setups, even if they're the same height, build and weight.
__________________
Ricardo

Best Segment: 25.3mi@76.9mpg
|

08-15-2009, 09:00 AM
|
 |
Half a Bubble Off Plumb
|
|
Join Date: Mar 2009
Vehicles: 2009 Toyota Yaris Sedan, 4 sp. automatic, 1998 Mercury Villager
Location: Bristol, Tennessee, USA
Posts: 232
|
|
Re: Crank-forward bicycling.
There's an old formula for upright bikes to set seat to pedal distance: Measure your inseam height. Stand with your feet flat on the floor, push something like a ruler between your thighs against the wall behind you and pull it up against your groin. The height of the ruler above the floor is your inseam. Multiply that by 1.74. Turn your crank so the bottom pedal is in line with the seat tube. Adjust the seat so the distance from the seat top to the pedal is your calculated distance. Always worked perfectly for me. Most people set their seats too low. Can't get the most efficient power out of their quads, and they grind their knees. Parents forget to raise their kids' seat heights as they grow. That's why you see kids going down level streets standing on the pedals. Too hard to pedal sitting with knees bent.
__________________
A cheerful heart is good medicine.
|

08-15-2009, 09:50 AM
|
 |
Veteran
|
|
Join Date: Jun 2008
Location: Eagan, MN
Posts: 1,037
|
|
|
Re: Crank-forward bicycling.
Quote:
Originally Posted by Yaris Hilton
Multiply that by 1.74.
|
cool, I may just try that math and see how close I come to where I have the seat set now.
__________________
-Allen
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
| Thread Tools |
|
|
| Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|