(whooshing)
- Merry Christmas and welcome to this
week's GCN tech clinic.
It's Christmas day and I'm still here
answering your questions, can you believe it.
And I've not even had my turkey didn't yet.
Anyway I'm looking forward to that,
let's crack on with your questions.
So first one is from RareRubyGamer RRG.
RareRubyGamer says can someone help my shifting
because it's hard to shift to the big gear on the
front the derailleur I have the Shimano 105 r7000.
Righty ho ho ho, right then the problem could
well be, I'm going to tackle the worst case
basically first of all because why not when you put
out of gear cable.
Into a bicycle and the components generally
we tend to fit ferals on the
ends that are made a plastic or metal and sometimes
the installer doesn't put them all the way
properly onto the outer cables,
So when you either break or you pull your gears
you know to change them.
What's happening is that the force
throughout all of the components where they're
joined with the cables the inner cable it pulls
the outer cable into position and more often than
not it takes a little bit of room in the feral or
alternatively goes all the way inside of a component.
So generally it's with a brake lever
tends to be the ones that which people don't put
in properly all the way and you won't be the first
person out there to pull a break and then think Oh
God it doesn't work and yet you just have to whack
it in a little bit further.
You don't Whack it by the way you
just place it in but in you're case you're using
mechanical gears there with the r7000.
So I reckon you've probably got a little
bit of cable stretch.
It could well be that the person who built the bike
didn't necessarily set it up correctly.
Maybe it's you RareRubyGamer I don't know but I would
personally put the, put the chain onto the smallest
chain link and then undo the little
bolt which holds the cable in place
the cable clamp then pull
through the cable nice and snug not tight not
really tight but get yourself some thin nose
pliers just pull it through and then re-tighten
that bolt and then try and change the gear again
cause I reckon it's probably just a little bit
cable stretch let me know how you get on though
Next up is Emil Irming who says hi John.
I've treated myself with a new seat post.
A carbon one that is.
Did you get for Christmas?
Before installing the new seat post,
I'd like to know how to clean
the seat tube from old gunk and grip paste.
Right and the easiest thing here get yourself a cloth
a nice clean cloth, put it down inside of the seat
tube as far as you can and just move it around and
then pull it out and try and remove everything like that.
What you could also do is maybe get
yourself a stick or a quite thick Allen key.
Something quite long and basically wrap the cloth
around it poke it down it in and then almost stir
it and try and remove it.
What I would not advise doing here is to get
yourself some degrease and spray that
on the inside.
The reason being that
could then go down wash, away or remove any grease
that's holding your bottle cage bolts in place or
alternatively and even worse your bottom bracket if
you've got a threaded bottom bracket down there
and you start removing grease well you could be in
a whole heap of trouble when it comes to removing
that bottom bracket but yet basically do that.
Right Next up is TWP CEW.
Twp Cew, I dunno know.
Anyway they say hello Jonnyboy, Jonnyboy?
Friendly, oh it's Christmas right I've got
Cannondale cat Optimo disk It's obviously got disc
brakes but with quick release axles.
Now that I'm looking for a pair of better disc
brake wheels they all come built for through axles.
Is there a way to get a nice set that can fit quick
release for now and then rebuild for
through axles when I get a higher end disc bike.
Yeah, nice question this and
something that you can get because loads of wheels
now come with hubs that have interchangeable axle end
caps so the axle inside is a is a hollow one
obviously and nice and big and basically you just
pop off the end caps for equip release and you
could put some other ones on for a through axle.
Everything is so simple these days of course not
every brand out there but have a little look
around brands like I think Zip DC Swiss they do it for sure.
Next up Vercin Festin, who says can I
change my spring on freehub pawls with the
strong and hard spring.
Yes, but don't do it.
Reason being if you start messing around with the
actual resistance and the spring tension on these
you could end up turning your bike
into a fixed wheel by mistake because they basically
had been pushed too far in one direction and
they're not able to release when you freewheel
which is going to come at quite a surprise when
you're riding along you try and freewheel and
everything gets ripped off or certainly your
rear wheel because of the momentum of the chain
trying to take it in the direction it doesn't want
to go in,
because your legs are forcing it back in the other way.
Although you don't know that it's
all subconsciously happening, it's a weird and wonderful
thing It happened to me once in a race and for 80
kilometers I had to ride fixed wheel because there
was no support car.
Absolutely awful, so yeah don't go ahead and
do that people they do say you can do this
and have a really loud free hub.
All it's going to do if you have a really tight
spring in there and when you do come to freewheel
it's going to slow down the wheel from rotating,
because obviously it's going to try and
basically as those free hub poles are beating on
the inside of the hub shell that's creating extra
resistance you're not going to be able to freewheel
for as longer.
Everyone likes to freewheel after all.
Stephen Clark says, could you not fit an 11
speed XDR cassette to work with Shimano 11 speed?
That question could also say could you fit and let
speed XDR cassette to work with 11 speed Shimano
So XDR fitting that is from Ceram
Right, so they both use a different fitting system.
The XDR uses a different free hub style of body,
whereas the Shimano that uses a traditional
style cassette body.
They will both work perfectly fine with one
another right because they're both 11 speed setups
the spacing is identical or near enough you know
it might be a very very you know a hair's
breadth in it but it works absolutely fine but as
for fitting that XDR cassette onto a Hyperglide
free hub body and vice versa.
No that won't happen
Now we've got one in from Popassassin81.
Hi there I have a Shimano 105 group set the last
version before the latest one
There's a little black plastic guide on
the inside of the front derailleur.
The chain seems to constantly rub this when in
the small ring at the front and the low gear at the back.
It's rubbed away the plastic but it
doesn't seem to be damaging the chain is this
normal for the 105 front the derailleur?
right it sounds to me like you need to actually
adjust the front derailleur first and foremost.
You can replace those little black bits they're
actually called a skid plate.
The purpose behind that it does in fact age
when it comes to shifting
from small to big chain ring and vice versa,
because it has a softer interface if you like
for the chain to meet the front derailleur where it
where it's shifted onto the chain ring.
meaning you can do less damage to each component but yeah
just buy one of those put it on there but
importantly you need to adjust that front derailleur.
Sounds to me like you've got a little bit of a
cable stretch possibly or you've been tinkering
around with those adjustment screws.
Right now we've got the final question this week.
It comes in from Richard Mijnheer.
Who says hi John I want to
buy a Shimano on r9100-P power meter crank set
without the chain rings.
I'm trying to save some money, nice one.
Can I put the R8000 Ultegra chainrings on it
or do I have to buy the
more expensive Dura Ace ones?
Right Richard, good question this one.
I've not tried this myself.
The innerchain ring should be absolutely fine.
The outer one though they look to now have an
identical profile.
The previous generation or maybe
it was the one before that they weren't
interchangeable because I remember a friend of mine
tried to put an Ultegra one on through Dura Ace so
vice versa and he had to basically dremmel a
little section away But you should be okay there
I've had a little look around and chainrings from
the likes of absolute black.
They say they are compatible with the
two so the Shamano ones I reckon should also
fit on there.
So I reckon the previous problem has been addressed.
Hopefully you're going to get yourself some well new power
numbers I guess when you buy that on r9100.
Right I hope you've all have a very good Christmas.
(sniffing)
No! the turkey is burning so I'm going to have to end the
video right now aren't I?
I hope you've enjoyed it,
a festive one after all.
Remember if you've got a
tech problem leave it for me down there in the
comment section below and I'll try and solve it in
a forthcoming episode and as ever remembered to
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