T.R | Title | User | Personal Name | Date | Lines |
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6.1 | | NEPTUN::DEHAHN | | Wed Dec 18 1985 07:52 | 19 |
|
I'm sure most of us have fiddled with them at some point of time.
Every time I've had wheels built by good, reputable shops (I didn't
have the time) they've fallen apart. So now I FIND the time to build them
myself. No free laps for wobbly wheels.
Factory wheels are the worst. Most are built on a Marchetti and Lange
or similar machine, which is no substitute for a good handbuilt wheel. Yes,
you do have a legitimate beef with whomever sold you the bike, IF you haven't
damaged the rim. Most shops don't bother to check tensions when setting up
a new bike, they just eyeball-true them. So, after the holidays, take it
back, and they should retension/retrue it for you. But they most likely won't
give you a new wheel, that's unnecessary.
Good luck
CdH
|
6.2 | | MENTOR::REG | | Thu Dec 19 1985 10:39 | 19 |
| My experience is similar to Chris deHahn's, eventually it is
best to learn how to do them yourself. You know its done right, you
know that the bike doesn't have to go into the shop for n days when
you want it the most (thats why they are so busy, everyone wants their
bike fixed when the sun shines), you also know that if you ding up a
rim on the road you can probably get it straightened out enough to
ride home on if you carry the little wrench. Any reputable bike shop
should true/tension a wheel from a bike they sold you, some will do it
free for the first year, others will even do it for free "forever"
(they want the traffic in the store and it makes fill in work). Now,
if you bought from a department or "toy" store things may be
different, they may have to give you a new wheel as the only way of
supporting what they sell.
Good luck with this, be an assertive consumer !
Reg (Who has knitted his own wheels since before he could
afford to pay other people to do it wrong)
|
6.3 | | PBSVAX::HALBERT | | Thu Dec 26 1985 10:42 | 5 |
| Wheelsmith in Palo Alto, CA, builds wheels using a robot. I have never owned
a set of these, but they have been praised as the best by a number of my
bikie friends there.
--Dan
|
6.4 | | SUSHI::KMACDONALD | | Wed Jan 08 1986 14:34 | 32 |
| I've built probably 150 -> 200 wheels in my bike mechanic days - some
things I've found out....
Machine built wheels are generally poor. You can usually tell a machine
built wheel because the "trailing" spokes are placed in the hubs with
the spoke head on the outside of the hub on one side of the wheel, and
the spoke head is on the inside of the hub on the other side. In most
handbuilt wheels the two sides are sort of mirror images of each other.
However, I have a machine built wheel that I got USED off a Gitane Super
Corsa in '73 (?) that's just finally starting to collapse for good. So
machine builts CAN be OK.
As for tensioning wheels - have found that most commercial rims are not
very round/true out of the box. So surprise, making a round/true wheel
out of one of these involves having slightly different tension on each
spoke. If the rim is real bad to start out with, the tensions may be
DRASTICALLY different. I would tend to avoid shops that guarantee
"wheels round and true within .00000009 nanometers" or such, if you
really wanted to ride those wheels. I try to strike a balance between
roundness/trueness and spoke tension, with the result that a new wheel I
build up might be perhaps a mm out-of-round (average tubular seems to be
about 4 mm out of round anyhow). A number of wheels built with this idea
in mind have not required any attention for several years.
When truing out a wobble in a wheel, it is a good idea to concentrate
your effort on several spokes - instead of tightening the spoke at the
center of the bulge 1 turn, tighten the spokes on either side 1/4 turn
and the one at the bulge 1/2 turn. And LOOSEN the spokes opposite, by
a similar amount. This distributes the tension and keeps the wheel from
going out of round. USE A GOOD SPOKE WRENCH THAT FITS YOUR SPOKES!
roll on,
ken
|
6.5 | better late than never | ZEPPO::LAMBERT | All in a days work... | Thu Nov 13 1986 17:44 | 24 |
| i know this a late reply to this topic, but i've only just become aware
of the conference....
wheels require constant truing, (at least if you're in my weight range
230-240, and you ride massachusetts country backroads to work daily). i
bought a low-tech minoura truing stand for about $28.00 and check my wheels
daily - they tend to need adjustment about once a week.
tensioning and truing are an art, once you've got the wheels trued to the
point of perfection, as mentioned, you can end up with lots of variance in
the tension. (you can check tension easily by plucking the spokes like harp
strings and avoid putting out $100+ for a spoke tension meter). Eventually,
if the wheel is in true, but unevenly stressed, it will warp out requiring
additional adjustment. eventually you get a rim that's been pulled into
reasonable shape and can be held there with relatively consistent spoke tension
all around - but you have to be constantly adjusting.
It not all that time consuming once you get through the first time, and you
do it regularly. the benefits are unbelievable, especially if you've been
riding on poorly trued wheels. Bicycling magazine ran a series of articles
on wheel rebuilding in the Feb, Apr, & May issues 1986 - copies available
on request.
-rfl
|
6.6 | | SUPER::CONNELL | | Fri Nov 14 1986 10:16 | 22 |
| RE: .5
Great to have you on the conference. Welcome aboard.
I'm a little hesitant to start out by disagreeing with something
you said, but I guess that's part of the reason for the conference;
exchanging ideas...
I find that properly trued and tensioned wheels should not need
much attention. I wonder if you don't have them tight enough?
This is often a source of trouble. (The spoke that is pointed down
at any time is deloaded by the weight of the rider. If that spoke
is not tight enough, the tension can drop near zero, causing the
nipple to turn and loosening.)
Lock-Tight is also good for problem wheels. Build the wheel with
clean spokes and nipples then Lock-Tight each after a short break-in
period.
Hope these ideas help.
Chuck
|
6.7 | | APOLLO::DEHAHN | | Fri Nov 14 1986 10:20 | 9 |
|
I agree in part with Chuck (as usual). Properly built wheels will
need very little truing unless they've been damaged. After truing,
spoke tensions SHOULD BE RELATIVELY EVEN. If not, you're not truing
them correctly. If there is a serious mismatch in tensions on adjacent
spokes, you have rim damage, and the wheel is basically junk.
CdH
|
6.8 | | APOLLO::DEHAHN | | Fri Nov 14 1986 10:25 | 14 |
|
Re: Loctite
I don't use it, I tried it once and it was more hassle then it is
worth. If you use top quality spokes straight out of the box, the
thin film of grease on them (assuming they're stainless) will lubricate
the threads enough to properly tension the wheel, but not enough
to cause slipping. If you feel they're too well greased then wipe
the thread ends off with a rag before lacing the wheel. Make sure
there's some lubrication, though, or there will be too much friction.
CdH
|
6.9 | Pre-destroyed rims still available? | SUSHI::KMACDONALD | Cybernetic Entomologist | Fri Nov 14 1986 10:57 | 18 |
| > If there is a serious mismatch in tensions on adjacent
> spokes, you have rim damage, and the wheel is basically junk.
Unfortunately, back when I was building a lot of wheels, often the rims came
pre-damaged for your convenience, usually with a big flat spot, out of
round spot, or side-to-side jump at the spot where the rim ends were
joined together. It's been a number of years since I had to build 15 or
20 wheels a month, hopefully the manufacturers are doing better now? I
just built a Mavic rim that was pretty nice; they used to be one of the
worst offenders, but it's too small a sample to judge.
As for truing stands, I got one about 2 years ago. I'll check the brand.
Took about 1.5 hours with a file and Dremel tool before an axle would
fit down into the two slots on the uprights! I'm still not very happy
with it.....
roller time again,
ken
|
6.10 | | SUPER::CONNELL | | Fri Nov 14 1986 14:44 | 14 |
| - Thanks for correcting my spelling of Loctite, Chris.
- Chris raises another good point that I forgot to mention.
Lubrication on spoke threads (or any threads anywhere) helps you
to tighten the joint and results in less loosening in the future.
This may seem counter-intuitive. In fact, I grease EVERY nut and
bolt when I am asembling a new bike. I also grease the lug nuts
on my car wheels (a great help in getting them off too).
- The only exception I would make to greasing spoke nipples is if
you like the Loctite route. Then you should make them dry so the
Loctite wil hold.
Chuck
|
6.11 | grease 'em all, except ... | BANZAI::FISHER | | Mon Nov 17 1986 05:28 | 11 |
| I find it useful to restrain myself from lubricating a few of the threads,
namely, those on the bottom bracket cups and those on the shifter bolts.
(That is, I do not grease them, anymore. I can only recall problems
whenever I did.)
As a matter of fact, I have never greased the threads on a steer tube,
either, and I don't think I would.
But, yes, 1st rule of mechanics: Grease those threads!
ed
|
6.12 | | JETSAM::HANAUER | Mike...Bicycle~to~Ice~Cream | Mon Nov 17 1986 09:04 | 8 |
| I envy those of you who have the skill and patience to true wheels.
Every time I have tried they end up worse than where they start, not
that I'm complaining (much). Have seen them do my wheels in Lexington
Cycle. In the time it takes for me to figure which nipple to turn,
Mark has finished the job.
So i leave it to Mark.
|
6.13 | on spoke wrenches | NOVA::FISHER | | Mon Nov 17 1986 09:45 | 8 |
| A local bike shop owner told me that some advice given to him many
years ago was, "You can make more money by giving away spoke wrenches
than by selling them."
Of course, nowadays, the cost of liability insurance would go through
the roof.
ed
|
6.14 | Lubricants and Torque | EAGLE1::CAMILLI | | Tue Nov 18 1986 10:13 | 7 |
|
I prefer Anti-Seize (TM, probably some non-standard spelling,
too) for lug nuts. You need something pretty heavy for stuff
on cars. It makes it possible to properly torque bolts and
nuts, and it makes it possible to get them apart in the future.
(The alternative is to move to Arizona, where the bolts don't
rust.)
|
6.15 | | SUPER::CONNELL | | Thu Nov 20 1986 16:28 | 5 |
| RE: .13
I like that... (I had to think about it a bit to get it.)
Chuck
|