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Thread: Tension Adjustable By Bungee

  1. #1

    Tension Adjustable By Bungee

    Although I think TiLite makes some of the best back upholstery out there, I wasn't willing to pony up the additional $105 SportAid charges for tension adjustable by straps back upholstery (TiLite's MSRP=$150). The only difference between it and the standard "Velcro adjustable" upholstery are a few D loops and Velcro straps between the two backrest ears. Without those straps on a relatively low back (12"), however, the top of the upholstery did not provide the degree of support I wanted. Since TiLite's backrest ears are fairly wide and relatively thick, I took a soldering iron and poked a row of holes along the inner edge of each ear, then laced some black mini-bungee cord though the holes.


    Not only does the upper half of my backrest provide excellent support, the added tension/elasticity keeps the ears from sliding on the back post and gives ever so slightly if I lean back into it. It is very comfortable.
    Last edited by SCI-Nurse; 08-15-2007 at 09:03 PM.

  2. #2
    Good idea, I now have a project this weekend.

  3. #3
    Senior Member Hype62's Avatar
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    That indeed is a good idea.
    May 2000, T4-5 Complete.

    Nam-Myoho-Renge-Kyo

  4. #4

    Update

    While pics will follow, I also eliminated the three straps below the backrest ears and replaced them with two more bungee cords which were the same diameter and the one in this pic, mv back height is 12", so the lower straps provided minimal support anyway. Getting the straps off of the back posts also made the back fold down more-easily.

    After increasing the wheel spacing by 1/8" on each side, and adding a 1/8" shim from ABS plastic to insert between the aluminum side guard and its mounting post, and removing the lock washer used with the small button head screw used to set the back angle, I can now fold the backrest down without removing the side guards.
    Last edited by SCI_OTR; 08-21-2007 at 12:10 AM.

  5. #5
    You might want to put metal grommets in, instead of just using the fabric. The pressure of the bungee cords would otherwise rip big holes in the fabric, I would think.

    Raccoon

  6. #6
    Quote Originally Posted by Raccoon
    You might want to put metal grommets in, instead of just using the fabric. The pressure of the bungee cords would otherwise rip big holes in the fabric, I would think.

    Raccoon
    Those backrest ears are thick, and the loop Velcro on the back pad which attaches to the hook Velcro of the ears takes a great deal of stress off the bungee. After all, TiLite uses this upholstery, sans bungee cord, as the standard upholstery on most TiLite chairs. They evidently feel that they use enough Velcro on the straps, backrest ears, and back upholstery that it should hold its own.

    I do believe you have a valid concern about this the holes tearing/stretching if this modification were attempted on chairs which use other adjustable tension upholstery designs.

  7. #7
    Senior Member wheelchairTITAN's Avatar
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    Quote Originally Posted by SCI_OTR
    Although I think TiLite makes some of the best back upholstery out there, I wasn't willing to pony up the additional $105 SportAid charges for tension adjustable by straps back upholstery (TiLite's MSRP=$150).
    Does anyone know if the TiLite back upholstery might fit the Quickie Ti?

    William

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  8. #8
    Quote Originally Posted by wheelchairTITAN
    Does anyone know if the TiLite back upholstery might fit the Quickie Ti?
    The flap of fabric below the padded portion of the upholstery attaches to Velcro which is sewn into the underside of the seat upholstery. Without that area of Velcro it may be difficult to match everything up for a clean appearance. It is also very expensive to buy the back upholstery from TiLite as individual parts.

    Quickie just released a different stye of adjustable upholstery on the GT which has more elasticity in the straps and has a neoprene type of cover. IMO it is better than their Jay Precision back upholstery.


  9. #9

    Final Pics

    Here are the pics of the completed tension adjustable by bungee backrest which folds down with the sideguards on.

    - Replaced the Velcro straps below the backrest ears with two mini-bingee cords.

    - I increased the rear wheel spacing by 1/8" on each side (to 1.25").

    - Added a 1/8" ABS plastic shim between the aluminum side guard and the mounting post

    - Removed the lock washer used with the small button head screw used to set the back angle (arrow).








  10. #10
    And you prefer this setup to, say, a Roho Low Profile Jetstream back because . . . ?

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