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Anybody rolling 27" wheels or anything larger than 26" ??? a small favor

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    Anybody rolling 27" wheels or anything larger than 26" ??? a small favor

    Hi looking for someone who rolls 27" wheels and/or larger wheels on their chair.

    What kind of hand rims do you have ?

    What tires are you using ? manufacturer/model ? non-marking ? or regular bicycle tires ?

    Tire size ? ETRTO designation?

    The Favor : would your measure the distance from the floor to the top of the tire to get the real world diameter of the wheel&tire.

    I've rolled on standard 26" (590-25) wheels & 25" (559-25).

    Not sure what the 27" wheel chair wheels really are.
    From : http://www.sheldonbrown.com/rim-sizing.html

    590 - 26 x 1 3/8 (E.A.3), 650 A
    597 - 26 x 1 1/4 EA.1, 26 x 1 3/8 (S-6), 650
    599 - 26 x 1.25, x 1.375
    622 - 700 C, 28 x 1 5/8, 29 inch
    630 - 27
    635 - 28 x 1 1/2, 700 B


    Yet from : http://www.1800wheelchair.com/produc...kwall-100-psi/


    Pneumatic Wheelchair Tire (27" x 1") ~ Lt Grey/Blackwall, 100 PSI -
    Fits Most 27" x 1" (700x28C) (622mm x 28mm)




    Thank you.
    Last edited by NW-Will; 10 Jan 2017, 8:02 PM.

    #2
    Sounds like you are looking for some 700c's ? My wheels right now are Sun with kenda nevegals on them for the winter and maxiss smoother tread the rest of the time. I have a set of 26" skinny tire wheels...but don't like them.

    Comment


      #3
      without knowing your reasoning (or for the specific application you want to use the wheels/chair for) consider the length you will be adding to your chair.

      I know guys who run 26" (590) wheels who don't have near the turning radius of a chair with 25". They are constantly backing into stuff, I can't imagine what 700's would be like - THEY ARE HUGE! I'm willing to wager bathrooms you are accustomed to would feel a lot smaller.

      Comment


        #4
        Originally posted by tooley View Post
        without knowing your reasoning (or for the specific application you want to use the wheels/chair for) consider the length you will be adding to your chair.

        I know guys who run 26" (590) wheels who don't have near the turning radius of a chair with 25". They are constantly backing into stuff, I can't imagine what 700's would be like - THEY ARE HUGE! I'm willing to wager bathrooms you are accustomed to would feel a lot smaller.
        559 with 2.10 or 2.50 is taller than a 26. What i really want is a set of 700c's to replace my 26" for high pressure skinny tires. Not everyone likes short wheels, i hate 24's.

        Comment


          #5
          Yeah I'm trying to do similar.

          Originally posted by giles88 View Post
          559 with 2.10 or 2.50 is taller than a 26. What i really want is a set of 700c's to replace my 26" for high pressure skinny tires. Not everyone likes short wheels, i hate 24's.

          Comment


            #6
            I'm trying to come up with a tire wheel combination so when I come in the house I can just swap wheels and keep the same geometry/cog/(no brake) adjustment etc.

            I'll be running 25" 559 wheels outside with larger tires.
            I'm currently using:
            25"*1" rims with a tire - 60-559 (26*2.35) 30-55psi Big Apple Schwalbe: which give an actual measured outside diameter @55psi of 26 7/8".

            on my other chair I'm running :
            26"*1" rims with a tire - 42-590 HS 349 Schwalbe :which give an actual measured outside diameter @maxpsi of 26 1/2".

            So a 26" (590) wheel is already too small...

            I would like to know what is the most common wheelchair (non-marking) wheel/tire size greater than 26" that anyone is running....... and hence can measure for me.. before I splash out any cash on this experiment.

            Must be some larger folks out there.

            the 622 - 700 C seems the most likely, but what do folks do for push rims ?


            cheers.

            Comment


              #7
              find the ETRTO size here (or any other circumference list):
              https://www.cateye.com/data/resource..._chart_ENG.pdf
              There should be a few of these out there because back in ye olde days before GPS we had to use them to program cycle computers.

              Then plug in the circumference into any circle calculator like this one:
              http://www.onlineconversion.com/circlesolve.htm

              And there you'll find all the diameters you'll need!

              See my post about handrims here:
              http:///forum/showthread.php?256495-...68#post1815568

              Comment


                #8
                These guys make very nice chairs that they offer with 26" or 28" wheels as standard: http://www.carbonblacksystem.com/design
                I have heard good things about the 28" wheels but have never used them.

                Comment


                  #9
                  Yeah great info.
                  I'm just after a real world measurement, from folks who roll on wheels larger than the standard 26" (590)

                  If you've ever compared two tires from different manufacturers same size. you'll easily get 1/8" -1/4" difference in the final diameter.

                  Plus I am taking tires which are meant for wider rims and putting them on 1" regular wheelchair rims so that in itself again throws out the measurement by a factor enough to take perfectly balanced chair to completely tippy unusable without adjustment.

                  As an example I'm running 26*2.35 which schwalbe calls (60-559) other manufacturers call them (58-559) ... the catseye chart gives me a circumference of 2083mm, a diameter of 663mm
                  26 1/8" Where the actual real world measurement gives me 26 7/8"

                  1/2" is too great a difference for my brakes to function with no adjustment.

                  Originally posted by brian View Post
                  find the ETRTO size here (or any other circumference list):
                  https://www.cateye.com/data/resource..._chart_ENG.pdf
                  There should be a few of these out there because back in ye olde days before GPS we had to use them to program cycle computers.

                  Then plug in the circumference into any circle calculator like this one:
                  http://www.onlineconversion.com/circlesolve.htm

                  And there you'll find all the diameters you'll need!

                  See my post about handrims here:
                  https://www.carecure.net/forum/showt...68#post1815568

                  Comment


                    #10
                    Looking like 700C is the standard wheelchair size ETRTO 622, some folks call em 27" some call em 28"

                    Using Brians charts with 27" x 1" or 28"x 1" (700x28C) (622mm x 28mm) . circumference= 2138mm : diameter = 680.5mm
                    26 13/16" so theoretically close enough to my 26 7/8" with 60-559 (26*2.35) tires I'm currently using.

                    Carbon Black wheels support only tubular tyres of the size appropriate to your wheels size (26 or 28” [700c]).
                    - from the carbon black website.

                    Originally posted by Adrian View Post
                    These guys make very nice chairs that they offer with 26" or 28" wheels as standard: http://www.carbonblacksystem.com/design
                    I have heard good things about the 28" wheels but have never used them.

                    Comment


                      #11
                      A (27"/28") sun wheel with a grey non-marking Cheng Shin tire (700x28c 28-622) @ 100psi actual measured diameter measurement 26 7/8".

                      funny there are no "inch" markings anywhere on the tire or wheel.

                      From the Schwalbe website :
                      28" :: 28-622 :: 28 x 1.10 :: 700 x 28C

                      From http://biketiresize.com/

                      28-622 :: English size 28 x 1-5/8 x 1-1/8 :: French size 700 x 28C 700C :: German size 28 x 1-1/8 x 1-3/4 ::
                      Last edited by NW-Will; 12 Jan 2017, 8:46 PM.

                      Comment


                        #12
                        So for those interested
                        my 559(25") rim with a - 60-559 (26*2.35) 30-55psi Big Apple Schwalbe attached to a 622 (27"/28") sun wheel with a grey non-marking Cheng Shin tire (700x28c 28-622) 700c via a long axle. It's hard to show in pictures, my tire(the black one) is barely a 1/16" bigger, but due to the inflation pressure difference, they pretty much end up being exactly the same when loaded. I can swap them onto my chair and the brakes line up.

                        My issue now is the Spox Hub fits over the axle, The sun rim is flush to the axle ,so it looks like I'd have to go with identical hubs to really make it work, otherwise I'll be too wide!














                        Comment


                          #13
                          That looks like a good set up, probably what i will end up using, except i really like the Maxxis DTH folding bead on the 559, very light.

                          Comment


                            #14
                            So rolling around on the (27"-28") 700c 622-28 in the house, and have to say not sure I could have got any closer if I tried.

                            So have an outside inside wheel/tire combination where I can keep my big tires(559(25") rim with a - 60-559 (26*2.35)) for outside etc .

                            All this so I have non-marking tires in the house.

                            The next issue is hubs !!

                            Need some hubs that recess like the spox hubs.. they give about a 1/4" a side so shrink me about 1/2" which I really need. I'm hovering at the 30" wide point.
                            can't adjust my axles as I'm using spox spinegy wheels for my outside tires !

                            Need to find some 700c spox wheels used anyone have any they don't want lying around ??
                            Or anyone know of other wheelchair wheel hubs that recess like the spox hubs do ?

                            Comment


                              #15
                              These are available in 700, with a 6 tab handrim... http://www.spinergy.com/products/spox-sport-x-laced

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