MECHANICAL
From creaking bottom brackets to wrapping those new bars in cork,
a mechanic's job is never done.
Creaking bottom bracket
If a creaking bottom bracket is driving you crazy and you're sure
it's adjusted properly, try Teflon tape. That is the white stuff
they sell in the plumbing section of your hardware store. It usually
works quite well. The problem is a result of bottom bracket shell
that is either slightly oversized or just as likely an out of
round BB. This happens when a manufacturer machines their shell
before welding the frame up. It is less expensive that way but
can result in mechanical and alignment problems. Another option
is to try a high quality cartridge BB. At spectrum we really like
the Phil Wood system. All of Phil's products are well made and
very precisely machined. It is possible that the bottom bracket
is actually not the problem. You can get what you will swear is
a bottom bracket creak or click from a whole host of other sources.
These include but are not limited to: loose crank bolts, unlubricated
chain ring bolts, unlubricated or loose pedals, worn pedal bearings,
old cleats, creaking interface between cleats and shoe soles,
loose or dry seat post clamp bolts, dry saddle rail/saddle shell
interfaces, dry stem bolts, dry handle bar/stem interface, an
imminent frame failure, a loose press fit for your headset, an
imminent fork failure, etc...or maybe it is just your legs.
Chain-Lubes
As cycling continues to evolve, we cyclists are a fortunate bunch.
Not only do we have control lever shifting, really good road triple
setups, better and better rims and wheels, lighter and stronger
frames, etc., we also have a sub-industry beating each other's
brains out to develop better and better chain lubes. These guys
fight tooth and nail for an essentially no growth market. The
best products end up getting a bit more share of a stable market.
We are impressed with products from Psycho Lube and Rock and
Roll. They have developed "dry" lubes to compete for
the part of the market that White Lightning pretty much had a
lock on for some time. These products are a step up from the past.
Now that I have had a chance to road test the stuff, I can report
that the products (Psycho Lube and Rock and Roll Gold and Extreme
Dry) lubricate better and last longer than White Lightning. They
also hold up to water better. Neither of them picks up any dirt
once dry. They give the chain more of a wet lube feel out on the
road than White Lightning does. Finally, neither of them get that
wax buildup.
PSYCHO LUBE. This stuff is a two
part, aerosol system. You can get the system at your local dealer,
but they can only get the stuff from the manufacturer. It is not
available to them from any distributors. You or your dealer can
reach Psycho Lube at: www.psycholube.com The biggest drawback
to the product is that they really don't tell you how to use it.
The directions are vague at best, so here goes (I will do their
work for them): Put your bike up in the stand if you have one
to make it easier to work on. Find an old Terry Cloth towel or
rag. Fold it once so that it is double thick. Place the rag behind
the chain between the chain rings and rear derailleur (the lower
run of the chain). Using the "Step #1" can and the supplied
red applicator tube, spray a 6"-8" section of the chain
liberally so that you really soak the chain and the towel too.
Immediately grab the chain with the now soaked towel and rub vigorously
back and forth. Then back pedal enough to expose the next 6"-8"
section of chain and repeat. Once you have gotten all the way
around with "Step 1", wait a couple of minutes and do
the same with the "Step #2" can EXCEPT, watch out! You
need to be careful with the #2 as a full push on the spray cap
will give you a huge squirt of the stuff. Just push it hard enough
to give the chain (and towel) a good soak. Your chain will come
out super clean and the stuff works for about 120 miles unless
you get stuck riding in a lot of rain. You'l love it.
ROCK AND ROLL. Rock and Roll is
a lubricant company out in Montana. They offer all sorts of bicycle
related lubes and I gather that they sell huge quantities of some
of their lubes all over the world to a wide variety of industries.
Anyway, the products at issue here are their "Gold"
and "Absolute Dry" Chain lubes. The products are really
very similar, but the Gold is good for an extra 20 miles or so
on the road. At the same time, the Absolute Dry seems to actually
lubricate a tad better. Just my perception. I was introduced to
Rock and Roll by one of my customers who needed a long lasting
chain lube that wouldn't pick up any dirt. He uses the Gold and
averages 120 to 140 miles from an application. The reason that
he picked Rock and Roll over other dry lubes is that it simply
lasts longer. During the first 80 to 100 miles it seems to lubricate
better than anything else as well. I find that the Absolute Dry
lasts me around 110 to 120 miles. Unlike the wax lubes, Rock and
Roll will not build up or flake off. Application is pretty much
"Cave Man Simple," so the instructions that come with
the product are more than sufficient. After application, the chain
looks new and feel even better than new, very slick. We like this
stuff so much that we give away samples of it with each of our
bikes even though we don't sell it. It is that good. Go to our
links page to find the Rock and Roll site.
Chain line and "Q" Question and Answer
I have a Spectrum Titanium circa '92 with the grease guard BB.
I have recently changed from the Campy Record to the " Racing
Triple " which I like very much. To get correct chainline
with the Record I changed the spindle from the 113mm that came
with the frame to a 109mm.When I changed to the Racing Triple
I have kept the same axle (which is centered) and get an acceptable
chainline of about 48mm(recommended 46+/-1.5) Everything shifts
great. The problem is that the drive pedal is nearly a centimeter
farther from the centerline than the left side. It feels OK and
I didn't notice a problem until I thought about it. Would it be
better to replace the original axle and offset it to the non drive
side or stay centered with this axel? Q is about 149mm as I measure
it. (Also I noticed earlier you recommended a very short BB for
the Dura Ace 7410 crank to somebody, I am at the bevels now ,
Could I change to a shorter one in the future if I wanted to?)
Thanks
Answer:
To decide whether you should go with a longer spindle with your
new setup in order to get even left and right "Q", you
need to look at two things. First, you need to look at how much
inward movement your rings can handle and still work properly.
You mentioned that your current chain line is a tad longer than
recommended. If you move the spindle to something like a 45mm,
will you have enough chain cross clearance? If so, that will do
much to even up your "Q." If you need to leave the rings
where they are to retain a properly working front derailleur and
chain cross clearances, then you can either leave it be, or go
back to your 115 spindle and shift it left. My guess is that you
will be better off moving your current spindle left a couple of
mm. Second, you have to ask yourself if you need even "Q".
Many cranks, especially the older ones never had even "Q"
anyway. In general though, even "Q is desirable for medical
(orthopedic) reasons.
Good question on the spindle flats. Your 113 and current 109
spindles have the original Phil design with the pretty long flats.
The new ones under 111mm have shorter flats and a longer 17mm
cylinder length. We recommend the Phil 105 for both the Dura-Ace
7410 and Record/Chorus cranks. That sounds a little long, but
the Phil flats are a bit different and you need to add an average
of 2mm to the original spindle length to get the right clearance.
When you use the Dura-Ace cranks with the 105 spindle, both cranks
fit perfectly into the ends of the BB shell. It is such a good
fit that it actually works to help protect the bearings from water
and grit. It also means that there is essentially no spindle flex
with the cranks so close to the outer edge of the bearings.
Let me know what you end up doing and how it works. Keep riding.
Headset adjustments
So many of the frames we receive for repair and refinishing have
trashed headset bearing races that I thought I'd explain how to
adjust threaded headsets. I will ignore Ahead type headsets because
following manufacturers' instructions for them is pretty straightforward.
First, keep in mind that if a headset is either a tiny bit loose
or a tad tight, you can ruin the races in as short a time as a
hundred miles. When I say a "tiny bit," I mean as little
as a sixteenth of a turn of a wrench. That is not much, and it
is very easy to screw one up. Compounding this problem is that
fact than many headsets and some frames and forks tend to "seat
in" during their first few hundred miles. During seating
in, the headset can come out of adjustment. As with all headsets,
the first step must be the preparation of the frame and fork.
But let's assume that your frame and fork are prepared perfectly.
Installing the headset requires the correct tools: a headset
press and a crown race slammer. Don't try it with home made stuff.
When pressing in the head tube races, make sure that they are
as reasonably tight as possible. This will reduce seating in time.
This also holds for the crown race. If you have a King headset,
special King tools are absolutely required for installation. You
cannot fake it. If you are using a Campy Record or Chorus headset,
notice that the two bearing sets are different. The little ones
go on top. Grease your bearings well with good stuff. After assembly
of the bearings, washers and lock nuts, you will need to assemble
the rest of the bike. You cannot properly adjust a headset until
everything is assembled. The front brake needs to be installed
and adjusted. The handlebar stem must be in place and TIGHT. If
it is not fully installed, final tightening will readjust the
headset.
When you have the bike assembled, straddle the front wheel facing
the rear of the bike. Assuming that the front brake is controlled
by the left brake lever (now on your right), grip the bar and
brake lever with your right hand. Squeeze the lever so that the
front brake locks the front wheel. With your left hand, use your
index and second finger to feel for the crack between the upper
race cone and cup. With your left hand in this position, use it
to rock the bike forward and backward against the front brake.
If the headset is loose, your fingers will feel a "click"
or "clunk" with each rocking motion. If the headset
is either correctly adjusted or too tight, you will not feel a
click. In the end, you want to get to the point where you are
within a few degrees, at most, from getting a click without actually
getting one. Now we start adjusting. First you want to get to
the point where the upper race and lock nut are snug against each
other and there is still a small click. Just take your time either
loosening or tightening both the race and lock nut till you are
to that point. Once there, you will need to know that holding
the upper race stationary while tightening the lock nut will actually
tighten the bearing adjustment. At the same time, loosening the
upper race against a stationary lock nut will loosen the bearing
adjustment. This becomes useful, as we want to end up with the
correct adjustment at the same time that the upper race and lock
nut are tight against each other. If you feel that you are close
to the right adjustment, but a bit loose, just hold the upper
race stationary and tighten the lock nut a bit. Check for click.
If you have lost the click, loosen the upper race against the
lock nut and check again. If you have not lost the click, tighten
the lock nut further. Eventually, by incrementally tightening
and loosening the upper race and lock nut, you will get to the
point where there is almost, but not quite a click, and the race
and nut are fully tight against each other. That is the sweet
spot. You will want to check adjustment for the first two hundred
miles every ride or so to make sure that things are staying in
adjustment. Don't be surprised if you have to touch up the adjustment.
A few final things, King GripNut headsets do not need very much
lock nut pressure. Go easy on them. Dura-Ace and Ultegra headsets,
while self-aligning to an extent, are a bit harder to feel click
with. Most headsets today use aluminum for their wrench flats.
It is very easy to bugger them up. Take your time adjusting your
headset. A few extra minutes now can save an expensive part of
your bike from a premature death.
Bar Tape Tricks
Over the years many of our customers have asked us how we get
our bar taping to look so clean. Well, here it is for everyone.
The trick is, you guessed it, "Superglue." I'll do my
best with this considering that I don't have pictures to go along
with this treatise.
First, we almost always use Cinelli Cork tape. I like the way
it feels and works especially well when the sweat gets bad. I
am aware that it does not last very long. I just think that the
feel is worth it. This taping method will work fine for any of
the padded stretchy tapes out there anyway. Second, I should say
that the purpose here is not really to have a tape job that works
any better than any other. I just like making them look good.
It sucks if you deliver a wonderful new bike with a crappy tape
job. The basic concept is to end up with what appears to be one
continuous tape wrap that looks as though it goes right through
the control levers without wrapping around them. Also, we want
to eliminate any of that silly Cinelli electricians' tape for
the end of the tape at the stem.
Materials and tools needed: Cinelli Cork bar tape, a straight
edge razor or Exacto knife, Super Glue'(the Permatex stuff works
well) and 3"X 10" piece of cardboard.
Before starting to wrap, peel back your control lever gum hoods.
They should remain on the bodies, but you can peel them forward
easily from their rear edges. Ergo lever hoods need to be peeled
over the release levers as you go. You can hold the bike best
if you straddle the front wheel while facing the rear of the bike.
This way, you can grip the front wheel with your knees.
Start your wrap at the end of either side of the bar making sure
that your wrap goes over the top towards the outside of the bar,
not the inside. This will assure that once you are finishing up
at the stem, the tape will be wrapping over the top away from
you as you ride. Do not try to start the wrap exactly at the end
of the bar. Start it so that there is at least half of the tape
width overhanging the end of the bar. This way you will be able
to trim the excess with your razor later for a clean look. The
yellow paper strip comes off as you wrap to expose the double
sided tape As you wrap, keep the tape tight enough to prevent
any looseness gaps, but not so tight that it tears. Also, as a
rule of thumb, you want to overlap the previous wrap by about
one third of the width of the tape. Less, and you risk gaps, more,
and you risk running out of tape. Watch out around the bends as
you will need to tighten up the wrap width to prevent gaps.
As you approach the bottom of the control lever, try to time
your wraps so that the last wrap just barely hits the bottom of
the control lever. If you have to make that last wrap with a bit
more overlap, no problem. No one will notice. As your wrap goes
past the bottom of the control lever, continue your wrap parallel
to the previous one till you run into the control lever body.
At this point, you want to use the razor to cut the tape at a
point so that it can be glued to the control lever body, but not
so long that the body hood can not easily get over it. Usually,
this works out to about 12-15mm onto the body. Apply two small
drops to the inside surface of the tape end you have just cut.
WARNING: DO NOT GET THE GLUE ONTO ANY PART OF YOURSELF! Stretch
the tape a bit as you stick it to the lever body, locating it
so that tape wrap appears even with the previous wraps. You have
about two or three seconds to get the location right as SuperGlue
sticks really fast once air can not get to it. Hold the glued
end of the tape onto the body tightly for about ten seconds. That
is enough.
Your next steps is to take the short extra piece of tape supplied
with your kit, and trim the ends of it to fit your control lever.
This short piece is one of the "tricks" to this tape
job. You are using it to apply a tape wrap, which appears to go
right through the control lever body. So before you remove the
paper backing, hold the short piece in place overlapping a third
of the last wrap and parallel to it. You will notice that for
clean ends of this piece, you will want to trim their ends diagonally
so that once the tape is applied, the ends will be cut vertically.
The Shimano levers do not require that you cut with much precision.
Campy levers do require it however. With Campy levers the lower
cut should be done so that the tape fits onto the short part of
the body just behind the ridge. This will give you only about
three millimeters to stick it to. It works, just cut accurately
so that the cut angle keeps the short piece of tape parallel to
the previous one. Your top cut of this short piece just needs
to be located so that the piece will have a good sticking area
well inside the lever hood. Once you are satisfied with the short
piece shape, peal off the paper backing, apply SMALL amounts of
glue to the ends and stick the LOWER end to the inside of the
control lever. Hold it tight for about ten seconds and then stretch
the piece around to the outside while holding the inner end and
stick the outer end to the body . Give the short piece a minute
or two to set up.
Now for the last piece, start above but still overlapping the
inside end of the short piece. Again, trim the end (if necessary)
so that the first wrap will be parallel to the short piece. If
you have Campy levers, you will need to make a more complex cut
to get around the release lever. Be careful to keep any tape away
from that release lever. Apply glue to the end, stick it in place,
wait ten seconds or so and start to wrap. At this point, you should
be wrapping over the top AWAY from the rider. Keep wrapping, keeping
the warps even so that you won't look like a geek. When you get
to the Ferule (Cinelli bars) or bulge (everyone else's), stop.
Here is where the final trick comes in. You have already thrown
away the end tape, didn't you?
OK. The tape will be coming over the top of the bar towards you
but somewhat diagonally. With the paper backing still on, place
your piece of cardboard behind the tape, supported by the top
of the bar. Decide where you want the tape to end when you are
all done wrapping. On Cinelli bars, this is usually right at the
ferule. With most other bars it will be at the start of the bulge.
If you use clip-ons, you will probably need to end further out.
Use your razor to carefully cut the tape perpendicular to the
bars. This will give you a tape end shaped like a sharp dagger,
tapering to a point. The cut itself is usually about 5" long.
Peel back the remainder of the paper, apply your glue in that
last 5" of tape, right up to the tip. Without gluing yourself
to the tape or your bike, finish the wrap so that the tape appears
to blend into itself and disappear without any lumps. Pretty Cool.
Don't worry; you'll get the hang of it after you do it a couple
of times.
Now to finish. Pull the lever cover back in place. With Campy
covers you will need to clear the release lever and kind of stretch
and wiggle it at the bottom to get it to click into place. Next,
take your razor and carefully trim the floppy end of the bar tape
where you started at the bar end. You want to cut it so that it
is flush with the bar end. If you use Cinelli bars, just stick
the end plugs in making sure that the Cinelli logo is upright
(not cool otherwise). With most other bars, you need to stick
a bit of leftover tape (a 1cm. piece) onto the plug tabs before
using the plugs. The inside diameter of those bars is a bit too
big for the plugs. DONE - at least for the first side. Now just
do the other side. If you get really screwed up doing this, I
just hope you had the smarts to try it on your friend's bike first.
Then you can do it right on your own bike.
Stems
The bicycle stem is a very important piece of equipment. The stem
is a highly stressed part of your bike and can cause serious injury
if it fails so choose wisely. Though we do not make Titanium stems,
we do like some of them for road applications. Many major manufacturers
including Cinelli and Seven make Ti stems for road bikes but for
mountain bikes your options are basically Seven and Moots. Although
the Seven and the Moots stems are indeed the best Ti stems on
the market, a mountain bike may not be the best place for them.
I'd stick with the tried and true stems on mountain bikes. Check
out a stem like the Salsa, it may be a bit heavier but at least
you know won't have to worry about it. We no longer offer custom
steel stems. They looked great, were built to last, but they didn't
hold your bars any better than other stiff, high quality stems
did.
How to use a Silca frame pump.
Trying to teach people how to use a Silca frame pump sounds pretty
silly, but there are good reasons. Let's walk through the logic.
* A frame pump is intended to get you home after a flat tire
and to beat off dogs, not to pump up your tires day after day.
A floor pump is designed for that purpose.
* Once you have fixed your flat tire, getting back on the road
quickly is paramount, dynamiting your tire up to eight or nine
atmospheres is not as critical as some would make it out to be.
* Silca frame pumps used properly will enable you to get your
repaired tire up to riding pressure (6-8 bar.) faster than any
other frame pump. Because of the larger shaft diameter, Silca
pumps give more pressure per pump than the others.
* Of all the full length frame pumps, the Silca is the lightest.
(the collapsible frame pumps are really cool but they are only
useful as devices for forcing you to take a long rest during your
rides.)
Silca pumps come with four different types of heads. They all
work the same, but the sealing grommets are only adjustable on
some of them. The sealing grommet is the rubber donut which the
tire valve goes through in the pump head. At this time, the most
common head is a dual finger type made by Silca shaped somewhat
like the old Campy steel heads. Although the fingers tend to break
pretty easily, the head actually works quite well. This type of
head uses a slotted screw at the back end of the head to adjust
the seal grommet. The older Silca made heads did not have adjustable
grommets. The Campy steel heads were adjusted by tightening the
screw-on grommet retaining cover. I say "were" because
Campy has not marketed their steel heads for years and the supply
has dried up. If you have one or can get one, DO IT! and sell
it to me. They were the best.
There are a few tricks which one must use while pumping tires
with Silca pumps. The most important thing to understand is that
presta valves can be bent or broken quite easily and one must
take steps to avoid doing so. Get into the habit of pumping your
tires up by only holding the pump, NOT by holding the wheel or
tire. The easiest way to do this is to pump up the tire with the
wheel off the bike. Work the pump head onto the valve stem by
moving the pump shaft back and forth while pressing the head onto
the valve. At all times, the head must be aligned with the valve.
If there is any pressure still in the tire, you must prevent the
pump handle from being forced out of the end of the pump by the
tire pressure. To do so, hold the handle and pump shaft tightly
together in one hand and, make sure that the head is perfectly
aligned with the valve as you press the head onto the valve. Once
the head is well seated on the valve, grasp the head and pump
end by wrapping your index finger around the end of the head and
holding the shaft tightly with the rest of your hand. Lift the
wheel off the ground with the pump, keeping the head and valve
at 12:00 o'clock. Always keep the head and valve aligned with
each other so that the valve has no bending pressure on it.
Start pumping up your tire. Be sure to not pull the handle too
far back. You can pull it right out of the shaft if you try. Once
the tire pressure begins to climb, you will find it more difficult
to pump. To get that last atmosphere or so in, you will want to
use leverage to your advantage. For the easy part of the pumping,
most people will have had the pump shaft running from side to
side around waist level. When the pumping gets more difficult,
you will want to end each stroke with the pump shaft almost perpendicular
from your waist with the head end away from your belly. That way,
you can pull the head end of the pump straight in while holding
the handle end in at your belly. Thus, while the pumping is the
most difficult, you will have the most leverage. This may sound
awkward, but once you get the rhythm, it is very efficient and
quick. With a bit of practice, you will be able to easily reach
7 atmospheres (about 100 lbs.) quite quickly.
Once you have pumped up your tire, the last trick is removing
the pump without harming either the pump or tire valve. Place
the wheel back on the ground with the valve still at12:00 o'clock.
Hold the pump handle in one hand and strike straight down on the
pump shaft with you fist as close to the head as possible. It
should pop right off.
Things to remember:
* A frame pump is to get you home, not for day to day use.
* Always keep the head aligned with the tire valve.
* Don't pull the pump handle out of the shaft.
* Never apply any lateral or torsional force to the tire valve.
* Pop the head off when you are done, don't wiggle it off.
* Send me all your extra Campy steel heads, prepaid shipping.