Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Recumbent What IS that thing?! Recumbents may be odd looking, but they have many advantages over a "wedgie" bicycle. Discuss the in's and out's recumbent lifestyle in the recumbent forum.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-26-08, 05:33 PM   #1
CrimsonEclipse
Registered User
Thread Starter
 
Join Date: Dec 2004
Bikes:
Posts: 508
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Are bents stable on bumpy roads?

With a 26" upright commuter, a certain series of bumps (think rumble strips with potholes) is more tolerable than my 20" folder, which can get squirley of the same patch.

So, how would a bent take urban bumps.
Does over seat steering -vs- under seat steering change stability?
What about wheel base?

(while I'm asking)
Can a bent handle a dirt or non pavement road with no hills?

Thanks

CE
CrimsonEclipse is offline   Reply With Quote
Old 08-26-08, 07:32 PM   #2
Floyd
el padre
 
Join Date: Mar 2005
Location: South East Kansas
Bikes: Rans Stratus, ICE TRike, other assorted
Posts: 1,497
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
I will just touch a little on your last question...my findings are that the tire size, just as with DF, help you stay upright on no paved roads...that is bigger tires mean better handleing on the rocks and or whatever.
That is must my own experience...FWIW
Floyd is offline   Reply With Quote
Old 08-26-08, 07:54 PM   #3
gcottay
Senior Member
 
gcottay's Avatar
 
Join Date: Jul 2007
Location: Green Valley AZ
Bikes: Trice Q; Volae Century; TT 3.4
Posts: 3,772
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Bents, which I ride almost all the time, have ride variations similar to DF's. Design, material, tires and suspension (if any) all make a difference.

The one rough-road drawback of bents as compared with DF's is that it some much more difficult to unweight yourself yourself when you hit a really nasty patch. On a DF you would be off the seat letting your legs absorb some of the shock. On a bent you sit there in your comforble seat and take whatever comes along that you cannot miss.

Many bents and many bent riders can go off road in the dirt. A few exceptional riders would disagree, but I would not want to use a bent as a mountain bike.
gcottay is offline   Reply With Quote
Old 08-26-08, 11:02 PM   #4
Jeff Wills
Insane Bicycle Mechanic
 
Jeff Wills's Avatar
 
Join Date: Mar 2008
Location: other Vancouver
Bikes:
Posts: 7,912
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Quote:
Originally Posted by CrimsonEclipse View Post
With a 26" upright commuter, a certain series of bumps (think rumble strips with potholes) is more tolerable than my 20" folder, which can get squirley of the same patch.

So, how would a bent take urban bumps.
Does over seat steering -vs- under seat steering change stability?
What about wheel base?

(while I'm asking)
Can a bent handle a dirt or non pavement road with no hills?

Thanks

CE
I've had no problems with rougher pavement and decent unpaved roads. A few years back, on Cycle Oregon 14, the route took us down several miles of smooth dirt/gravel road. My wife and I on our Lightnings had no problems, and we went about the same speed as the uprights.

That was the second day of the ride- from Seneca to Crane, Oregon, on September 10th, 2001. The next day we rode to Diamond in the quietest procession I have ever been involved in.

Jeff
__________________
Jeff Wills

Comcast nuked my web page. It will return soon..
Jeff Wills is offline   Reply With Quote
Old 08-26-08, 11:03 PM   #5
LWB_guy
Senior Member
 
LWB_guy's Avatar
 
Join Date: Apr 2008
Bikes:
Posts: 296
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I found a couple flat sections of road -- one on a bumpy dirt road and one on a paved road -- that I rode over once on my bent. Now I avoid those sections.

Riding down the street of a small town tonight after dusk, I had a frightening experience. I hit a speed bump at around 20 mph, way too fast. The speed bump was unpainted, so I never saw it until I hit it with my front wheel while moving fast.

It would not have been a pleasant experience in a car. It was unpleasant on the bike. I relaxed
my arms and maintained stability and control, and kept going. I am happy my bike is so reliable. I'm also glad I wasn't turning when I hit the speedbump. I ride a long-wheelbase (63.5inches) bike with underseat steering.

My seat height is 23.75 inches above the pavement. That's much lower than on a regular upright bike. The lower your seat is, the harder it is to lean over to one side. However, I find I can easily compensate for this by moving one leg outboard while the other one rests on the pedal.

Yes, my bike can easily handle dirt or gravel roads. It's just the washboard sections caused by heavy trucks driving repeatedly on flat, wet, dirt roads that I want to avoid. The smooth gravel or dirt roads are just as good as asphalt.

One exception: Tonight I was traveling on a two-lane paved road. The shoulder was concrete, sloped pretty well away from the asphalt, like on a freeway. During daylight, I rode over the rumble strips on the concrete with no trouble, just a little friction. After dark, it felt bad when I drove on the sloped concrete shoulder.
I didn't like the feel. It was uncomfortable with traffic passing me. So I moved back to the left of the white lane and felt fine.
LWB_guy is offline   Reply With Quote
Old 08-27-08, 02:12 AM   #6
Myqul
Senior Member
 
Join Date: Jul 2008
Bikes:
Posts: 184
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by gcottay View Post

The one rough-road drawback of bents as compared with DF's is that it some much more difficult to unweight yourself yourself when you hit a really nasty patch. On a DF you would be off the seat letting your legs absorb some of the shock. On a bent you sit there in your comforble seat and take whatever comes along that you cannot miss.
I have to disagree with you there. When i come to a "nasty patch" in the road i "sit up" on my HiRacer (so my bum is on the seat but my back isnt resting on the back rest) This has the effect of unweighting the back wheel to absorb the shock
Myqul is offline   Reply With Quote
Old 08-27-08, 09:34 AM   #7
cat0020
Ride more, eat less
 
cat0020's Avatar
 
Join Date: Feb 2007
Location: NW Philla, Hoboken NJ, Jamaica/Brooklyn NY
Bikes: Too many but never enough.
Posts: 554
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Speed is your friend, your forward moving momentum will increase your stability going over bumps.. to a certain level... until you taco your wheels.
cat0020 is offline   Reply With Quote
Old 08-27-08, 10:26 AM   #8
John C. Ratliff
Senior Member
 
John C. Ratliff's Avatar
 
Join Date: May 2002
Location: Beaverton, Oregon
Bikes: Rans Stratus, Trek 1420, Rivendell Rambouillet
Posts: 1,906
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have an older Rans Stratus, and have over 9000 miles on it. I have found it to be very stable for minor bumps and pavement interruptions. The Stratus, as as long-wheel base recumbant, has a light front wheel, and so in fine gravel it tends to skid a bit. But in other situations, where you would in an upright be close to off-balancing, it handles very nicely. Because of the low center of gravity, it is more stabe in many of these situations than an upright bike, which has a much higher center of gravity. Being made of steel, and with the long-wheel base feature, the bike also absorbs bumps quite well. I do deload my back by leaning harder against the seat, and lifting my rear off the seat pan, when there is a big bump. My backrest, and upper back then takes the bump and not my lower back and spine.

John
John C. Ratliff is offline   Reply With Quote
Old 08-27-08, 12:21 PM   #9
CraigVM62
Member
 
CraigVM62's Avatar
 
Join Date: Aug 2008
Bikes: Garage Full
Posts: 46
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Years back I tried several of the Bike-E Recumbents, including their model with rear suspension. It made a night and day difference for me when test riding over some 1" to 2" potholes. I see several other makes and designs out there that utilize some suspension systems. It would be great to hear what owners of those bents have to say regarding this subject.
CraigVM62 is offline   Reply With Quote
Old 08-27-08, 08:20 PM   #10
gcottay
Senior Member
 
gcottay's Avatar
 
Join Date: Jul 2007
Location: Green Valley AZ
Bikes: Trice Q; Volae Century; TT 3.4
Posts: 3,772
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Myqul View Post
I have to disagree with you there. When i come to a "nasty patch" in the road i "sit up" on my HiRacer (so my bum is on the seat but my back isnt resting on the back rest) This has the effect of unweighting the back wheel to absorb the shock
You're right on that. I do the same thing. For me it's sort of an involuntary twitch without even thinking about the purpose. The bad spots do make me wish those nice flexing legs were working as shock absorbers.
gcottay is offline   Reply With Quote
Old 08-28-08, 08:05 AM   #11
JanMM
rebmeM roineS
 
JanMM's Avatar
 
Join Date: Jan 2006
Location: In Central IN
Bikes: RANS V3, RANS V-Rex, RANS Screamer
Posts: 13,292
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
"..rumble strips with potholes" sounds like a lot of fun.
JanMM is offline   Reply With Quote
Old 08-28-08, 09:35 AM   #12
crackerdog
Senior Member
 
Join Date: Mar 2008
Location: Port Townsend, WA
Bikes: xtracycle, electric recumbent, downtube folder and more
Posts: 982
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have a couple of BikeE FX which have shocks in front and back. I found it amazing how much difference it made to have front shocks for handling. Just like in a car, the front shock helps to keep the front wheel in contact with the road. I was riding down a slight hill at maybe 15 mph and decided to try biking in the swale next to the road. I could hardly tell I was off the pavement, it handled so well. Though, I don't care for the BikeE in general, the FX is nice for off road or gravel.
crackerdog is offline   Reply With Quote
Old 08-28-08, 10:15 AM   #13
LWB_guy
Senior Member
 
LWB_guy's Avatar
 
Join Date: Apr 2008
Bikes:
Posts: 296
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
My long-wheelbase bent has two separate parts. One part supports my bottom. The other part supports my lower back. Recently, I discovered that by pressing my back against the back support, I can lift my butt off the bottom section. I did that while crossing railroad tracks.
LWB_guy is offline   Reply With Quote
Old 08-29-08, 05:44 PM   #14
John C. Ratliff
Senior Member
 
John C. Ratliff's Avatar
 
Join Date: May 2002
Location: Beaverton, Oregon
Bikes: Rans Stratus, Trek 1420, Rivendell Rambouillet
Posts: 1,906
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by CrimsonEclipse View Post
I appreciate the input.

Um, what does DF mean?
(I'm guessing it means and conventional frame but I can't guess the exact phraseology)

CE
DF = "Diamond Frame" which is a regular bicycle.

John
John C. Ratliff is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 09:36 AM.