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Loss of tire air pressure... raising blood pressure

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    #31
    Learned my lesson about pinching a tube a couple years ago while practicing on my road bike. Small skinny tire, extremely difficult to get on and off. My first 2 failed patches don't you know...
    My repairs all seem to fail with in 5 minutes after reinflation, after mounting in the tire. It's not a cut or hole, the air just seems to find a way out. I'm thinking that I am too impatient and don't let the glue dry thoroughly before setting the patch and/or not waiting long enough after setting the patch and rolling it down. How much time is necessary? Read something about a fingernail test? Would waiting a long time hurt at all?

    I plan on building up the rim, and will be sure and check for sharp spots. "
    Oh wait that was that walmart bike" Gulp...that's what this is off of. :-(
    See my completed Magic Pie V5 rear hub motor E-Bike build HERE.

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      #32
      Schwinn Cruiser 29er Death Trap Deluxe spent more time pushing it than riding it.
      2018 Motobecane Boris Fat Bike BBSHD Build

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        #33
        Checked rim and nipples for sharp spots or edges and filed down... cut holes in first rim strip to fit around nipples. Then added another strip on top. (rubber cut from old tube) Very careful with install...

        On the road again! Bike path in Illinois!



        See my completed Magic Pie V5 rear hub motor E-Bike build HERE.

        Comment


        • max_volt
          max_volt commented
          Editing a comment
          Iowa corn porn. Hard pore corn. Glad you are back in the saddle.
          Last edited by max_volt; 07-07-2018, 01:08 PM.

        • Rider
          Rider commented
          Editing a comment
          Sure that's not Nebraska? Lol...

        #34
        Wednesday's Tire Pressures Update!


        As of 6-6-2018...To recap. At this time I just changed my back tube with a thorn proof over sized one. It's been on the bike for a week. I try to take a couple mile bike ride every day. I plan on getting digital tire pressure readings once a week. My base line is skewed right off the bat :-( as I forgot to get the ambient temperature at the time of the first test and I started off 1 PSI low. Keep in mind, I'm doing my best to take a quick, solid one time reading...with the tires cold (setting awhile). but nothings perfect. Once read for the week, will try improvements recommended then reset to 40 PSI and start again. Bike rests on single stand.

        …...…......……...……..Ambient Temperature / Front Tire / Back Tire Corrective Action...…………………………..Comments:
        Base Line: 5-30-2018 UNKNOWN …………….39.0 PSI...… 39 PSI.. New Back Tube Installed
        6-6-2018...………….. 77 degrees ………......…35.0 PSI...… 30 PSI...Tightened Schrader Valve Cores (both)......Loss of 4 PSI front and 9 PSI back, seems excessive.
        6-13-2018...………… 75 degrees...……………36.5 PSI...… 38 PSI... Tightened cores a bit more (maximum) Added new valve stem caps with seals. Making progress! Loss -3.5 PSI front -2 PSI back.
        6-20-2018...………… 77 degrees...……………37.0 PSI...….38 PSI... Added Stans tire sealant to front tube. Finally adding some Stans! No change with new caps. Loss -3 PSI front -2 PSI back
        6-27-2018...………… 76 degrees...……………36.5 PSI...….38.5 PSI. Added Stans to the back tube. No improvement in front :-( Loss front -3.5 back -1.5
        7-4-2018...…………...80 degrees...…………….0.0 PSI...….37.5 PSI Front tire flat... :-P Ordered new thornproof tube. Loss Front -40 Back -2.5 Installed new front tube. 7-6-2018.
        7-11-2018...………….88 degrees...…………….37.5 PSI......37.0 PSI Could be as good as it gets...will add last bottle of Stans to back tube. Loss front -2.5 back- 3.

        Last update and epilog next week.

        See my completed Magic Pie V5 rear hub motor E-Bike build HERE.

        Comment


          #35
          [LAST] Wednesday's Tire Pressures Update!


          As of 6-6-2018...To recap. At this time I just changed my back tube with a thorn proof over sized one. It's been on the bike for a week. I try to take a couple mile bike ride every day. I plan on getting digital tire pressure readings once a week. My base line is skewed right off the bat :-( as I forgot to get the ambient temperature at the time of the first test and I started off 1 PSI low. Keep in mind, I'm doing my best to take a quick, solid one time reading...with the tires cold (setting awhile). but nothings perfect. Once read for the week, will try improvements recommended then reset to 40 PSI and start again. Bike rests on single stand.

          …...…......……...……..Ambient Temperature / Front Tire / Back Tire Corrective Action...…………………………..Comments:
          Base Line: 5-30-2018 UNKNOWN …………….39.0 PSI...… 39 PSI.. New Back Tube Installed
          6-6-2018...………….. 77 degrees ………......…35.0 PSI...… 30 PSI...Tightened Schrader Valve Cores (both)......Loss of 4 PSI front and 9 PSI back, seems excessive.
          6-13-2018...………… 75 degrees...……………36.5 PSI...… 38 PSI... Tightened cores a bit more (maximum) Added new valve stem caps with seals. Making progress! Loss -3.5 PSI front -2 PSI back.
          6-20-2018...………… 77 degrees...……………37.0 PSI...….38 PSI... Added Stans tire sealant to front tube. Finally adding some Stans! No change with new caps. Loss -3 PSI front -2 PSI back
          6-27-2018...………… 76 degrees...……………36.5 PSI...….38.5 PSI. Added Stans to the back tube. No improvement in front :-( Loss front -3.5 back -1.5
          7-4-2018...…………...80 degrees...…………….0.0 PSI...….37.5 PSI Front tire flat... :-P Ordered new thornproof tube. Loss Front -40 Back -2.5 Installed new front tube. 7-6-2018.
          7-11-2018...………….88 degrees...…………….37.5 PSI......37.0 PSI Could be as good as it gets...will add last bottle of Stans to back tube. Loss front -2.5 back- 3.
          7-18-2018...………….86 degrees...…………….35.0 PSI......35.0 PSI Even but low. Just added last bottle of Stans to back tube. Caps tightened. Loss front -5 back -5.
          7-25-2018...………….80 degrees...…………….39.0 PSI......38.0 PSI This is closest to where I'd like to be.



          Conclusions: Tubes leak. :-) My biggest gain was making sure the valve cores where tight, and that the stem caps where tight. I feel good about the thorn proof tubes from a tear and puncture resistance point.
          Maybe wrenching on the nipples with the tire under pressure tore my previous light skinned tubes. Still a mystery. Added extra protection in the front. Rear will be addressed also. Perhaps the Stans tube sealer will pay off in the future stopping a leak, but I don't see a difference now. Keeping my compressor as easy to use as possible. Eyeing a bit of a bulge/deformity in the back tire (sigh). Tires will be next.

          Well that's my data points as of now. Thanks to all for the responses.


          Best regards,
          T.C.

          See my completed Magic Pie V5 rear hub motor E-Bike build HERE.

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