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Thread: Suggestions for new chair

  1. #1

    Suggestions for new chair

    Greetings! So my everyday use chair is the original TiLite X I left Craig Hospital with 13 years ago. It's taken some abuse over the years but for the most part has served me well... and my Medicare Advantage plan has been good about paying for most repairs. However, i currently have access to funding for a new chair... a new chair on par with or higher-end than what my TiLite was back in 2003, so I'm very excited about this opportunity. I'll be coordinating it all through the fine folks in Craig's outpatient services department, but there's a waiting period so I have some time to do a little research and hopefully gather a little bit of first-hand intel before I get in to see them.

    My primary criteria is that the chair is ultra-light and ultra-portable. I can currently pick up my TiLite and place it in the trunk of my Subaru wagon without the need to fold or break it down at all. I'd like to keep this ability. I also travel by plane 4-7ish times per year. In these cases, everything is broken down as much as possible and gate checked - haven't had anything go TOO, too wrong and need to make sure this new chair is durable enough to keep that streak alive. On a secondary level, I'd love my new chair to be able to handle some challenging terrain (or at least a bumpy sidewalk) better than my current one - things like suspension systems are starting to look interesting. At the same time, I realize anything of that nature will add weight. I have a FreeWheel... perhaps that is the solution to stick with?

    I've been looking at the newest TiLite models... quite closely at the ZR. I have a feeling that this is the direction in which I'll be pointed at Craig Hospital... quality chairs, proven time and again, on (or not far off) the forefront of some of the newest design/innovation, etc, etc. But I know there's more out there and since I'm in the unique situation that I am, I'd like to at least check and see if some of these newer horses deserve to be in the running. A close friend, who knows a lot about engineering in general, mountain bikes and sports cars (wheelchairs specifically, not so much) believes carbon fiber is the way of the future. I found this post: http://www.apparelyzed.com/forums/to...s-a-good-idea/ to be quite informative. It's from 2014 so I'm sure there's been some more said by some equally knowledgeable folks since then.

    Does anyone use a chair like the Carbon Black, Panthera X, any of the Motion Composites models or anything in that league? Anyone's thoughts, knowledge and/or experience with carbon fiber frames as opposed to titanium as it pertains to weight, durability and compactness would be great to hear. Is carbon fiber a sensible material for an everyday-use wheelchair or should it be limited to aircraft, fast cars, mountain bikes and chairs designated specifically for engaging in one's sport?
    Last edited by daveh0; 10-14-2016 at 11:46 AM.

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    *** c4/c5 incomplete *** Injured in Summer 2003 ***
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  2. #2
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    Carbon fiber is far less tough than alloy particularly with respect to impact damage. Toughness is the measure of a material's ability to sustain damage but still function. While carbon composite are very strong, they are not very tough and a single hammer-like blow can be fatal.

  3. #3
    Suspended Andy's Avatar
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    I second the questioning of CF in a wheelchair design. It might be fine if all you do is ride it, but looking how beat up and grind-marked my TR3 is from breaking it down, dragging it on the ground, and ramming into things, I suspect that a CF frame could not survive what a metal frame can.

  4. #4
    Quote Originally Posted by Mize View Post
    ...they are not very tough and a single hammer-like blow can be fatal.
    If I understand correctly, that blow would have to be applied directly to an individual tube. If so, while a direct blow could be fatal, something more realistic, like the chair colliding with another object or possibly being dropped would not be equally as fatal. Is this accurate?

  5. #5
    I have a TR with a non folding back and a CF camber tube. Without the wheels and cushion it is 9 pounds I can easily pick it up with one arm, an all CF chair might be cool but I don't know if I would trade the durability of titanium for a couple of pounds.

  6. #6
    I've definitely been hearing a lot about durability being an issue with a CF frame. I just call that into question considering a lot of very high end downhill mountain bikes are made of CF. I know we use our chairs far more than an average mountain biker... and their bikes have insane suspensions, whereas our chairs have none, but I still have to think those bikes take a far worse beating. Does anyone know where/when/how the weakness of a CF frame would rear its ugly head?

    *************************************************************
    *** c4/c5 incomplete *** Injured in Summer 2003 ***
    *************************************************************

  7. #7
    Quote Originally Posted by daveh0 View Post
    I found this post: http://www.apparelyzed.com/forums/to...s-a-good-idea/ to be quite informative.
    daveh0,

    My comments in your referenced post are more true today than the day they were made. It's not a question of materials choice, it's a question of engineering choices. The carbon fiber chairs I've built have performed flawlessly for many years under very demanding conditions. I am absolutely confident that a carbon fiber everyday chair can be built that is superior to metal frame chairs in every way. I can't guarantee that anyone else is doing it.
    Last edited by SCI-Nurse; 10-20-2016 at 08:26 AM.

  8. #8
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    I agree, carbon fiber technology has come a long way. Most super cars these days are using carbon fiber for the ENTIRE structure of the car (both frame and body). They arent going to build something that does 250 mph out a non durable material.

  9. #9
    Black Alloy and Brad09, thanks for the input. THat's definitely been the general direction of my thinking with the more research I conduct, but the challenge still lies in the task of finding a CF, everyday-use chair that actually *has* been engineered in such a way as to put the material to use "properly". Of course the manufacturers will tell me they are doing this and not being an expert in the field, I have very little grounds on which to contest their claims.

    What would/should one look for in evaluating whether or not proper design considerations have been made for a CF frame? What are the tell-tale signs of poor engineering? How can I tell by looking at and/or sitting in a chair that it's not going to fail catastrophically when the baggage attendant at the airport doesn't treat it with as much TLC as should be when loading it into the belly of the plane... or any of a dozen other scenarios come to be in which my chair's durability is put to the test? My fear is that there are no answers to those questions that would serve much practical use to the average "civilian" gimp... like me.

    Any knowledge of any CF chairs commercially available today that are known/proven to be able to handle the rigors that my current titanium frame has being doing for the past 13 years? I don't feel comfortable taking the manufacturers' word for it. First (and maybe even second) hand knowledge and/or a trusted 3rd-party review will be required for me to feel it a prudent, worthwhile investment. I wish the technology (and it's use with specific respect to wheelchairs) were a bit older so more of this could exist. But if anyone does have any of this type of info to share, please lay it on me - I'm all ears. I *want* this to be the right direction.

    *************************************************************
    *** c4/c5 incomplete *** Injured in Summer 2003 ***
    *************************************************************

  10. #10
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    The only carbon chair I've seen in person is the panthera x. A guy in my neighborhood has one. Unfortunately I don't know what to tell you as far as real world durability goes and if these manufacturers are engineering these chairs to the level we need them to. That's a good question you bring up. I guess the only way to know is from the experience of others that use a carbon chair everyday and put it through the paces. Most people want a carbon chair because it makes car transfers, etc. easier because of the weight, but for me its making the chair lighter to push and the less effort to do it that would make the biggest difference. I'll be looking into these the next time I'm up for a new chair.

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