Advertise on Bikeforums.net



User Tag List

Page 3 of 3 FirstFirst 123
Results 51 to 66 of 66
  1. #51
    Senior Member
    Join Date
    Jun 2009
    Location
    Potashville
    My Bikes
    Reynolds 531P road bike, Rocky Mountain Metropolis, Rocky Mountain Sherpa 10, Look 566
    Posts
    1,080
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Myosmith View Post
    ...That style of bike is also very limited in scope of use. I do want to state that I am a big supporter of bike share programs for green reasons and general public health concerns, but how many people would choose those public share bikes for daily personal use?
    By bike share, do you mean public rental bikes such as Velibs? The Velib bikes in Paris get used by Parisiens every day. I saw men and women in suits, pedalling off to the office on them. They don't want to lug a bike downstairs from their apartment every morning or worry about it being stolen while at work, so they just buy a yearly subscription card and use the nearest Velib station.
    Come to think of it, those bikes would probably work quite well for the O.P.s purposes. Strong frame, deep step through, easy enough to add gears in the form of a hub gear. If I were going to recommend a bike to someone who hadn't ridden in years and was intimidated both by gearing and by getting on, something like this would be on my list. Especially the hub gearing. Very easy to use, especially in traffic, so less intimidating to complete novices.
    The Breezer Uptown LS comes closest to this design.
    http://www.breezerbikes.com/bikes/de...uptown_8_ls_us

  2. #52
    Senior Member
    Join Date
    Nov 2012
    Posts
    245
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Myosmith View Post
    Unless university level projects have changed a lot since I was in school (think quill and ink) practical application is a significant part of the final analysis and grade. After all, the purpose of university study is to prepare you for a career in the real world.

    You are absolutely right about the bike share programs though. Most of them are geared toward college students and other short distance commuters which has limited crossover to the morbidly obese looking for a way to improve fitness. That style of bike is also very limited in scope of use. I do want to state that I am a big supporter of bike share programs for green reasons and general public health concerns, but how many people would choose those public share bikes for daily personal use?
    While bike share bikes certainly aren't ideal to race in a tour de france, without a doubt, they are designed to be durable because the not so nice general public will be using them. The ones that come to mind off the bat are the ones in Washington D.C. they are step thru frames and the ones that are going to be launching here in NYC are also going to be step through frames. These bikes are designed to be tough and to last, not only so they don't have to be replaced often, but also for liability purposes i'm sure. While it would be nice to be able to take a bike that looks just like the latest and greatest Cervelo and say "here you go morbidly obese person, your perfect bike" it's simply not feasible. At some point the morbidly obese do need to swallow some pride and acknowledge that the ideal bike to get them moving and improving their health, may not be the coolest looking thing out there. Form follows function, not the other way around. Things like internally geared hubs are also a great option for keeping the bike simple and is something that ALL people new to cycling could potentially find useful.
    Last edited by DiscTruckerMF; 02-10-13 at 08:47 AM.

  3. #53
    Senior Member Shellyrides's Avatar
    Join Date
    Aug 2012
    Location
    Redding CA
    My Bikes
    C1970 to 74 Peugeot, 80's Lotus 3000 m mountain bike
    Posts
    330
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The idea of being able to rent or lease a bike why you lose weight is not a bad one. Then when the rider has lost the weight they can return the bike and get a better one, that matches there riding better.

  4. #54
    Senior Member
    Join Date
    Jun 2007
    Location
    Time & Space
    My Bikes
    3 good used ones
    Posts
    1,102
    Mentioned
    16 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by BIG_BIKE View Post
    Greetings Bike Forum’s members:
    Our goal is to design and build a better bike for largely obese individuals(Upwards of 350 lbs). We are a group of 3 undergraduate students at the University of Colorado Boulder working with Prof. Rodger Kram. We call ourselves the “BIG BIKE” project. We need all the help we can get from real life people who have experienced the hassles of riding a bike unintended for obese riders. Here are some of the issues we need your opinions, complaints, and experiences to create the best bicycle possible:


    1) Strength of the bicycle (all aspects)
    2) Seat comfort
    3) Gearing
    4) Brakes
    5) Tires/Wheels
    6) Aches/Discomfort/Pain associated with riding


    FYI, I am an avid bicyclist and hope to go into the profession of Physical Therapy post graduation. Any contributions or opinions about these issues are greatly appreciated.
    Sincerely,
    Gabe Kowalsky (gabriel.kowalsky@colorado.edu)


    May I suggest starting with the tires.

  5. #55
    Uber Goober StephenH's Avatar
    Join Date
    Sep 2007
    Location
    Dallas area, Texas
    Posts
    10,533
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Let me offer up some additional comments:
    1) In additional to dealing with weight variations, you have height variations. It may not be obvious, but if you're, say, 5'-10", you can go down to Walmart and buy a bike and it'll fit you reasonably well. And if you're 6'-2", it just won't. So to complicate the supply of frames, you have deal with larger/smaller frames as well.
    2) If you are actually designing the bike, you'd want to establish an upper bound as well. That may be limited by something mundane like the available seatposts, cranks, pedals, or brakes. Or may be limited by finding out that nobody weighing over, say, 600 lbs, has ever ridden a 2-wheel bike (I'm just guessing at what that limit would be, I haven't taken a poll.) However, that maximum weight will determine a lot of the design parameters for the product.
    3) Bikes aren't normally built for 400-lb people, but they are quite commonly built for 400-lb teams, so research tandem wheels as a source of additional components. (Main difference: I think tandem rear wheels are wider, so you build the frame wider to handle them.)
    4) A question to consider is how many people weighing over 350 lbs have put a lot of miles on a bike at that weight? I'm sure it's been done. But I would guess most riders of that weight range either don't ride very much, or they give up riding, or they lose weight and fall out of that weight range. So something along the lines of a bike rental program may make more sense that actually designing a bike. And designing a $2,000 bike may be very limited in returns due to those kinds of issues.
    5) You can make a bike from steel, aluminum, titanium, carbon fiber, whatever, and make it as strong or as weak as you'd like. One consideration you may want to look at, though, is your available labor and materials. When I was in college, our ME lab had guys there that could weld. Could they weld aluminum, titanium, anything you put in front of them using any process whatever? I kind of doubt that, they were skilled, but not skilled in every conceivable way. Then also, how available is oddball gauge titanium tube? Or do you have the means to heat-treat a frame after welding? Working out what is and isn't feasable for materials, labor, and processes may vastly simplify the choices of what to use. For a production bike, you'd need to visit with the people in Taiwan that build production bikes.
    "be careful this rando stuff is addictive and dan's the 'pusher'."

  6. #56
    Junior Member
    Join Date
    Feb 2013
    Location
    Boulder, CO
    My Bikes
    In the making
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for your response! You have a great point

  7. #57
    Junior Member
    Join Date
    Feb 2013
    Location
    Boulder, CO
    My Bikes
    In the making
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    This is exactly what we were thinking. Nobody wants to stand out, we will keep that in mind- BIG BIKE

  8. #58
    Junior Member
    Join Date
    Feb 2013
    Location
    Boulder, CO
    My Bikes
    In the making
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    This is a great point. Right now it is a hot topic weather a person would rather be seen struggling to mount a double diamond or be seen riding a step through. Aluminum may be the way to go. Thanks for your time- BIG BIKE

  9. #59
    Junior Member
    Join Date
    Feb 2013
    Location
    Boulder, CO
    My Bikes
    In the making
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thank yo for your response. This is just the king of feedback we were looking for- BIG BIKE

  10. #60
    Junior Member
    Join Date
    Feb 2013
    Location
    Boulder, CO
    My Bikes
    In the making
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    This is true! We are a school project. Thanks for seeing our vision- BIG BIKE

  11. #61
    Junior Member
    Join Date
    Feb 2013
    Location
    Boulder, CO
    My Bikes
    In the making
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thank you for your input. The last thing we want to do is offend anyone. I'll check out the podcast. - Gabe

  12. #62
    Junior Member
    Join Date
    Feb 2013
    Location
    Boulder, CO
    My Bikes
    In the making
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Gravity Aided View Post
    I was 6'5" and 400 + when I started lurking here and riding my Huffy Cruiser around looking for a better bike . 2-3 guys in my club started out the same way, so I never felt alone in my endeavor to lose weight riding a bike. I'm down in the 290's now, by no means finished but much better than before . I'll have to modify a lot of diet and exercise issues to get lower, but I have to. My case does not seem to be an exceptional one . I think your research , Gabe, can do a lot of people a lot of good . Keep up the good work , get some wheels under this project. Engineering, marketing and research are all good directions for you to explore at this juncture.
    Thank you so much for your response. We hope this project will end up doing good for a lot of people- BIG BIKE

  13. #63
    Junior Member
    Join Date
    Feb 2013
    Location
    Boulder, CO
    My Bikes
    In the making
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thank you for your response. This is exactly what we are looking for- BIG BIKE

  14. #64
    Senior Member
    Join Date
    Nov 2012
    Posts
    245
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    keep us up to date, don't forget about us, some interesting stuff you guys got going on here!

  15. #65
    Senior Member
    Join Date
    Jun 2009
    Location
    Potashville
    My Bikes
    Reynolds 531P road bike, Rocky Mountain Metropolis, Rocky Mountain Sherpa 10, Look 566
    Posts
    1,080
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by baron von trail View Post
    May I suggest starting with the tires.
    Aw, you beat me to it. I was looking at a Surley Moonlander yesterday and thought of this thread.
    In many ways this is the perfect bike for the purpose, apart from price perhaps.
    1. Very wide bottom bracket means the cranks are far apart - great for preventing chafing between the thighs
    2. With a tire pressure of about 9 psi, can be ridden over practically anything without worry
    3. Not a bike that they'd outgrow, as it's extremely versatile and would still be useful long after the weight was lost.

    I'm thinking of trading in my commuting bike for one, as we have few paved highways surrounding the city and it would greatly increase the number of cycling routes available.

  16. #66
    Junior Member
    Join Date
    Aug 2012
    Location
    Sheffield, England
    Posts
    24
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hi,

    I'm 6ft 2, 588lbs and very mobile/agile for a person of my size/weight.

    I would buy one of your BIGBIKEs - I've currently got 1000.00 burning a hole in my pocket because nobody seems to have the right idea of what kind of bike I can buy - any ideas?

Page 3 of 3 FirstFirst 123

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •