Re: What do you carry in your toolkit?



I wrote:

One thing I have never been able to understand is the "perceived need"
many folks have for tire levers - a stock item in many toolkits. They

[snippage]

Andre Jute <fiultra1@xxxxxxxxx> wrote:
Oley Maloney, I wouldn't even try getting beaded tyres on and off with
my hands. A writer is a manual labourer who earns his living with his
hands on his keyboard. I can't afford as much as a fingernail torn
into the quick. Anyway, those belted Marathon Plus and Satellite Elite
Hardcase are a killer to get on even with tyre levers working at waist
height on a table, never mind scrabbling around on your knees in the
scrub beside a road.

Huh. I'd never even consider a fingernail to be in the least danger (no
clawing at the tire required), so it may be a technique thing, or I just
have (and have always had, through various sizes of bike and tires) easy
tires/wheels. Most recent tire I put on was a wire bead Michelin
transworld city thing - supposedly also belted/puncture resistant, but I
don't know if it's "especially easy to put on (or take off)" as compared
to your examples. It's a 559. Took that off at least once in the
process, also took off the old tire, whatever it was. I suspect it's
technique, but I don't know if a text description will do the job of
demonstrating. Definitely not like Sheldon's method per his website.

To remove - if not already flat, let all the air out, or remove the
valve core if you have Schraders and a valve core tool handy. Presta
users might need to unscrew the valve stem and push it down into tire, I
don't use those so I'm not sure - it's sometimes needed with the base of
the Schrader. Squeeze tire all around to release bead from rim. Squeeze
bead together in vicinity of valve stem, push down into middle of rim.
Set that part on the ground. Grab opposite side of tire and push over
the rim - both beads at once, pushing with the heels of your palms and
balls of your thumbs, using fingers to grip tire and twist it towards
the side you are pushing it to. The rim is more-or-less vertical in the
process, so you have the ground to push against. Both beads are down in
the center of the rim as far around as possible to give the most slack.

Installation is darn near the reverse of removal. Just make sure that
the tube (barely inflated) is down inside the casing, not sticking up
between the beads. Drop the valve stem in the hole, squeeze the bead in
that area into the middle of the rim, and work the tire over the other
side both beads at once. Check both sides carefully for tube in wrong
place before inflating.

Once mounted, inflating to 5 psi or so, bouncing the tire on all sides
and then deflating before reinflating supposedly helps with tube kinks,
and seems worth doing. On the second inflation I worry about seating the
bead well when there's a little bit of pressure, then take it up. One
bead blowout bang is more than enough for a lifetime.

If the above offends since it's not the canonical method, go right on
doing what you do now - but it works for me, and it's a lot less fuss,
IME, than that whole one-bead-at-a-time method and tire levers.

--
Cats, coffee, chocolate...vices to live by
.



Relevant Pages

  • Re: Tire blow off
    ... tire bulging wider than the rim. ... That same tension pulls on the tire bead ...
    (rec.bicycles.tech)
  • Re: Clinchers and Cyclocross
    ... myself are using, what is the lowest pressure you ... I recognize that proper bead seating may initially require a higher ... ago, and with a brand new flexible-bead tire on the front, he rode back ... since it will hold onto the rim better. ...
    (rec.bicycles.tech)
  • Re: Thumb test
    ... the edge of the rim's hook, rather than the external pull of the tire ... bulging wider than the rim. ... It was unclear to me what you'd meant by 'lateral pull', ... bead like a rope wrapped around a pole. ...
    (rec.bicycles.tech)
  • Re: Clincher tire bead tension
    ... on what casing does to the bead. ... Because tire blow off is such a closely related effect, ... pushing inward on the casing between the edges of the rim serves the ...
    (rec.bicycles.tech)
  • Re: Tire blow off
    ... casing tension which is not radial. ... Friction will not hold the tire in place, ... the hook of the bead by inflation pressure, ... canceled by tire casing constriction. ...
    (rec.bicycles.tech)