okay Hawkins do it again there wasn't
fast enough
oh hi everyone coach Calvin here for
Park Tool Company on tech Tuesday today
we're gonna look at what we want to
inspect when we have a lot of bikes to
look at this would be for someone say a
coach who's got a big fleet of bikes
behind him or if you're running a fleet
you have a large community group
you're not very technical this can
happen but we can still do a lot so
we're gonna walk through the bike
without tools and see if we can solve
problems by identifying them then we can
get somebody else in we can take it to a
bike shop but again the important thing
is identifying the problem then we can
worry about how it's going to be fixed
so we're gonna have a look at this race
bike here we're gonna start at the front
of the horse and we're gonna work our
way to the back just to be consistent
and get yourself a system so we're going
to begin again right up front we're
going to inspect the tire are we wore
out or the knob shot if it's a slick
tire were you showing casing give it a
good squeeze yeah so pressure gauge is
nice when you have one but it's also
good to learn that oh I'm not really
sure I better get the gauge you will get
a sense after squeezing a lot of tire
what's reasonable after squeezing for
tire pressure we grab the whole wheel
pull back and forth feeling for knocking
here we've got done we give it a spin
and see it's reasonably true that's nice
we also spinning and we see the brake is
not rubbing we're gonna reach down here
and we're gonna grab with one finger I'm
gonna pull on that Stuart pull it
doesn't open
that's probably tight we're gonna leave
that alone
I come up to the top here I'm gonna get
behind I'm gonna look at the crown the
two legs here and I'm gonna look at the
bar so how does our bar compared to our
crown are we straight that's good
is the stem tight on the bars I'm gonna
grab and twist the grips also we're
tested this way no twisting of the grips
let's stand in front
no wiggle there that's all looking good
up front and then bounce it around
bounce that thing around think it's
gonna take some pounding so you're not
hurting anything
see if there's a rattle or a knock also
the levers you want to just give these a
simple twist I twist look I twist these
nope that one should not be moving like
that easily problem right there we also
want to grab our levers and give them a
good pull see if we think they're going
to stop the bike the right lever feels
fine the left ones coming all the way up
to the grip so it's gonna lose its power
we're gonna have serious problems with
this brake they should feel more or less
the same we got issues on the left lover
so from here we move on back we're gonna
go now so the crank set it's good to
give it a spin
I'm sighting from above and looking at
the Rings are the Rings wobbling nope
these look look pretty good that's
that's great I'm gonna grab a crank arm
here go back and forth go left to right
there's no play no clunking there we
like that let's keep moving back now
we're at the saddle up and down up and
down see the little bit of flex normal
it's not slipping it's not popping how
about left right left right that's good
is this straight that's another thing to
check we're coming to the back we're
checking the tire the casing and also
the trueness of the wheel give it a spin
huh little brake rod here we also want
to check the rear skewer as we're
walking through them again it'd take the
one finger here
oh yeah not good so two things you
needed here one is it tight skewer the
other points being your coach education
this athlete needs to learn how to get
that wheel in properly tight one of the
last things we're going to inspect is
the shifting it's nice to have a stand
for this we're going to see that we get
one click I'll put the lever for one
gear in back see how that goes it does
seem to shift it is really nice
even for our non mechanical technical
people to learn to really push the
limits I'm gonna put a finger the upper
knuckle here I'm going to put my thumb
below and I shove that and you'll notice
even though the click stopped here the
limit the wall of that adjustment is
allowing it to go beyond into that cog
into the spokes that is going to ruin
somebody's day in a hurry so this would
need some adjustment and the outside
same concept I pull and see that it
doesn't come off front derailleur you
want to shove all the way to see if it
falls off the front you want to also
shift inward to see if it's gonna drop
it on the bottom package one of the last
things quickly to look at is just a
quick inspection cracks don't see any
cracks that's why it's nice to have a
relatively clean bike any frame cracks
will show up and while we're inspecting
the frame we also want accessories we
can check here this used to be a bottle
cage broken off this should probably be
removed we can hear that wiggle that
bolts probably not good it's loose this
should come off the pump attachment
could stay there going to be better off
we don't want extra sharp objects on our
bike for our rider that's it
coach Calvin you're done hit the showers
time for a change of hats now it's
mechanic Calvin now you know the
problems now you can start fixing so
remember walk through your bike
systematically
find the problems talk to your mechanic
let them do their job that's it for tech
Tuesday we'll see you next time thanks
for watching if you enjoyed tech
Tuesday's check out a repair help video
library which has detailed guides to a
wide variety of common pipe maintenance
procedures and of course be sure to
subscribe to our youtube channel for the
latest videos from Park Tool