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7/24/2019 How Do I Stop Chain Rattle
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01 Cut the valve off an old inner tube. Begi nwrapping the tube around your chainstay;
trap the first wrap of tube under the second to
hold it in place.
T H E B I G Q U E S T I O N
Q&AHow do I stopchain rattle?
THIS MONTH:SILENCE CHAINNOISE, CHAINSTAY PROTECTION,SHOCK BUSHINGS SERVICE
YOUREXPERT
AL VINES
A shop mechanic
for 13 years, Al has
been there and fixed
that. He owns 10
bikes and says his
least favourite job is
sorting out internally
routed cables.
QMy bike is noisy when riding over
really rough ground, and the flapping
chain is starting to damage the paintwork.
What can I do?
Keith Roberts, email
AYou cant silence the noise completely
unless you opt for a singlespeed
drivetrain, but there are two ways you can
stifle it. Firstly, you can limit the flapping
movement of the chain so that it hits the
frame less often, and secondly you can
dampen any noise by placing padding andprotection where the chain hits the frame.
In addition to this you can employ
mechanical means. The finest invention for
this purpose is a clutch rear mech, either in
the form of Shimanos pioneering Shadow
Plus design or SRAMs Type 2. Both vastly
increase the tension in the derailleur cage
and this reduces the movement of the chain,
resulting in less noise. A clutch mech makes
a huge difference and, thanks to technology
trickling down to Deore level, a Shadow
Plus can cost as little as 49.99. It will not
only make your bike quieter, it will also
make it less likely that the chain will become
derailed from the chainring handy if
youre running a 1x drivetrain.
The key difference between the two
systems is that Shimanos top-end XTR and
XT mechs have adjustable tension, which
means you can get the perfect balancebetween chain retention and smooth gear
changes; on the SRAM the tension is fixed.
Both products allow you to reduce tension
when removing the rear wheel with Shadow
Plus its via the on/off switch, whereas the
Type 2 has a catch to hold the cage in its
forward position, which does a similar thing.
To minimise the amount
of chain flapping around
and save weight, measure
the chain length by
passing the chain around
the largest chainring
and the largest sprocket
(avoiding the rear
mech). Shimano then
recommends adding
two whole (male and
female) links, while SRAM
suggests adding one
link and a Powerlock or
Powerlink connector.
On many full-
suspension bikes the
distance between
the cassette and the
chainrings grows as
the bike is compressed.
Shimanos advice is to
measure the chain length
with the suspension fully
compressed to indicate
maximum chain growth.
My personal method
is to fit the chain around
the largest chainring
and sprocket, through
the rear mech, and then
remove enough chain to
have the rear mech at
near full stretch with the
bike fully compressed (on
a full-suspension bike).
CHECK CHAIN LENGTH
H O W T O
100 PEUJANUARY 2014
Take compression
into account when
cutting your chain
MAKE A CHAINSTAY PROTECTORUsing an old punctured inner tube to protect
your chainstay may not be pretty but its really
effective. The rubber reduces noise from chain
slap plus its tough, durable and free.
01
02
W o r l d M a g s . n e t W o r l d M a g s . n e t
W o r l d M a g s . n e t
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Pull the tube nice and tight as you wrap it. Use electrical tape as
shown to neaten it up and make the tube extra secure.
03 Continue to wrap the rest of the chainstay, spacing each wrap
evenly. Finish the end of your protector with a good few tight
wraps of electrical tape.
02
FITTING SHOCKBUSHINGS
QIve got some play in the
rear end of my bike and it
seems to be the shock bushings.
Are they easy to fit, should I gofor offset ones (Nukeproof
Mega seems to be slack
enough with a low enough BB
already?) and what ones do I
need? Are they standard?
Monte, forum
AFirst, check the shock
bushes are definitely the
problem by placing your finger
on the shock mount as shown
above, and lift the saddle up
and down to unweight and
weight the bike. Any play will be
felt through your fingers. Also,
check both mounts becausethey sometimes wear at
drastically different rates.
If youre happy with the
geometry of your bike then
dont mess it up just fit a
standard bush. You need to
get the correct size for your
shock though, as different
manufacturers use different
diameter shock eyelets. Most
shocks use a 12.7mm bush,
but TF Tuned has a guide on
its website (tftunedshox.com/
MountKitGuide.aspx) so you can
find out. Regarding removal
and fitting, you can
bodge it with a socket
set and a vice, or get a
proper tool like BETDs
(see mountainbike
components.co.uk),
which will cost
you 28.99.
FURTHER READING
QAre there any mountain
bike maintenance books
you would recommend for the
home mechanic?
Andy McKeown, email
AWe like Park Tools Big
Blue Book of Bicycle
Repair(24.99). Its in its third
edition now, and it should be up
to date for a while. Also, make
sure you keep an eye on thehow to pages in this ere mag.
And if theres anything youd
like to see or think weve
missed, let us know via
UPGRADING TO 10-SPEED
Q My current wheels have
Deore XT hubs fitted to
DT rims. However, the M756
freehub I have says it is for 8-9
speed. I will be using a 2x10
set-up. According to what I can
see I need part FH-M756A for
the 10-speed cassette. Am I
going to give myself grief if Igo ahead and fit my 10-speed
cassette to the 8-9 speed hub?
Ive seen 10-speed spacers for
sale do I need one?
markrussel78, forum
AAny Shimano 8- or 9-speed
freehub can take a
10-speed cassette. So you don
need to upgrade this part; you
can just buy a new cassette
and chain, and fit them. The
10-speed spacer you have seen
is for road riders who want
to run a 10-speed
cassette on
an 11-speed
body.
QUICKFIXES
Hands-on job: youll
soon get a feel for
detecting bushing play
JANUARY 2014PEU10
Got a question
about fixing your
bike? Email
mbr@ipcmedia.
com with Q&A in
the subject line
Chainstay protectors either stick on or
wrap around your chainstay to deaden
noise. The stick-on stuff includes
protective clear tape often called
helitape, as it was originally designed
to protect helicopter rotor blades, but
its great at protecting against
paint damage all over the bike.
For greater sound
deadening there are
wrap-around guards made
from neoprene or a
co-moulded plastic.
Neoprene offers
a universal fit,
whereas the
plastic guards
are made to fit
a certain specific make and model of
bike. If you dont want to spend much
money then there are other options,
including Velcro, 3M rubber mastic
tape and even an old inner tube.
10-speed cassettes will
fit without a spacer
DEADEN THE NOISE
03
There are numerous
products on the market
for reducing chain rattle
W o r l d M a g s . n e t W o r l d M a g s . n e t
W o r l d M a g s . n e t
http://worldmags.net/http://worldmags.net/