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Thread: Offroad/All terrain wheels

  1. #21
    Like others have said sand sucks. Even my Jeep has trouble in sand. I got a set of Slime tubes, I think 24 to put in my knobbies, just in case of flats. Most of the time when I have the knobbies on the chair, I have no use for the brakes. Its not rolling anywhere in dirt, gravel, sand. I carry a short strap to buckle around the wheel and frame if I need a brake.

  2. #22
    As I could not find a chart that had the 50-501 tire dimensions so I asked the little man to grab a wheel before he left to school this morning. the tire has about 10PSI in it so it may get a few MM larger when fully inflated but I am getting right around 595MM in OA diameter. Thinking these should be pretty darn close close to my 23-559 25" (26") wheels.

    Cheers,
    Jim

  3. #23
    Senior Member NW-Will's Avatar
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    Did you measure your 23-559 tires full inflated? for the outside diameter ?

    I measured a bunch of tires a while back, the standard wheelchair tires 23-559 or in old money 25*1 comes out at just under 25", I measure it as 24 7/8".

    Your 25" wheel gives you 24 7/8" = 631.825mm
    as compared to the measurement for the 50-501 - 595mm = 23.4252"

    you're looking at over an inch difference in outside diameter.

    Just for reference, the standard wheelchair wheels with tires fully inflated:
    25 * 1 (559) gives a measured outside diameter of 24 7/8 "
    26 * 1 (590) gives a measured outside diameter of 25 7/8 "
    27 * 1 (622) gives a measured outside diameter of 26 7/8 "



    Quote Originally Posted by LJH View Post
    As I could not find a chart that had the 50-501 tire dimensions so I asked the little man to grab a wheel before he left to school this morning. the tire has about 10PSI in it so it may get a few MM larger when fully inflated but I am getting right around 595MM in OA diameter. Thinking these should be pretty darn close close to my 23-559 25" (26") wheels.

    Cheers,
    Jim

  4. #24
    Here lies the problem, I am a newbie at all this and I am still in the Behemoth that I was sent home from rehab in so I do not have a 23-559 to measure as of yet so I can't do a direct comparison. Tilite is scheduled to ship my chair on the 26th so I should get it right around the end of the month.

    It is interesting that you measured the 23-559 tires at almost 632MM as every chart I look at shows them as being 609MM, that is a pretty big discrepancy. To be honest I hope the charts are correct as I am thinking I would rather deal with a 5MM drop then a 15MM drop.

    Cheers,
    Jim

  5. #25
    Senior Member NW-Will's Avatar
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    Yeah post what you actually measure, and what tire you are using. would be informative.

    I found the charts were quite off..

    I ended up running : 60-559 (26*2.35) 30-55psi Big Apple Schwalbe's which gave me an OD of 26 7/8" on regular 1" wide wheelchair standard rims
    Which I can swap with my 27" wheels, with what I call 27"*1" tires - grey non-marking Cheng Shin tire (700x28c 28-622) @ 100psi actual measured diameter measurement 26 7/8"
    So I can do a straight swap with out any adjustments to the brakes, center of gravity etc..


    Quote Originally Posted by LJH View Post
    Here lies the problem, I am a newbie at all this and I am still in the Behemoth that I was sent home from rehab in so I do not have a 23-559 to measure as of yet so I can't do a direct comparison. Tilite is scheduled to ship my chair on the 26th so I should get it right around the end of the month.

    It is interesting that you measured the 23-559 tires at almost 632MM as every chart I look at shows them as being 609MM, that is a pretty big discrepancy. To be honest I hope the charts are correct as I am thinking I would rather deal with a 5MM drop then a 15MM drop.

    Cheers,
    Jim

  6. #26
    Quote Originally Posted by NW-Will View Post
    Yeah post what you actually measure, and what tire you are using. would be informative.

    I found the charts were quite off..

    I ended up running : 60-559 (26*2.35) 30-55psi Big Apple Schwalbe's which gave me an OD of 26 7/8" on regular 1" wide wheelchair standard rims
    Which I can swap with my 27" wheels, with what I call 27"*1" tires - grey non-marking Cheng Shin tire (700x28c 28-622) @ 100psi actual measured diameter measurement 26 7/8"
    So I can do a straight swap with out any adjustments to the brakes, center of gravity etc..
    Yes, I could totally seeing charts being off and am looking forward to seeing what the real difference is. I just got conformation that my Carbon Blades shipped and will see them next Thursday so I can do some actual measuring.

    Cheers,
    Jim

  7. #27
    Just an FYI, I finally received my Carbon Blades. When I put an axle through both the 501 Sumo wheel and the 559 Carbon blade, both fully inflated, the 501 Sumo's was a good 3/4" from the floor from the floor. That combined with the Freewheel raising the front of the chair an inch plus made me nervous. I have decided to exchange the 501's for the 540 version. The 540 will be taller then the 559 Blades but with the Freewheel things should be pretty good.....or at least that is what I hope.

    Cheers,
    Jim

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