T.R | Title | User | Personal Name | Date | Lines |
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124.1 | Do It Yourself Track Bike! | MOSAIC::WASSER | John A. Wasser | Wed Aug 06 1986 17:51 | 13 |
| > 2.ANYONE KNOW WHERE I CAN GET ONE FOR UNDER $200.00?
You can probably find a 5/10/12/15 speed for under $200.
Remove the brakes and deraileurs. Fill the freewheel
with epoxy. Glue the freewheel to the rear hub (more
epoxy) so it won't unscrew when you try to slow down.
Select a gear and shorten the chain to match. :-)
-John Wasser
P.S. How do they attach the gear on a track bike so it
doesn't unscrew when you 'apply the breaks'?
|
124.2 | Another approach... | DRAGON::GAVIN | | Wed Aug 06 1986 18:09 | 27 |
| Track bikes use a special hub that has a narrower threaded section
where the freewheel would go on a regular hub. The single cog (without
frewheel) threads onto this section. Outside of the cog, the hub
is reduced in diameter and is threaded left-handed. A special locking
ring (looks like the lock ring for a movable BB cup) threads on
and presses against the cog. Pedalling forward pulls the cog onto
the threads, keeping it tight. Pedalling backwards or braking tries
to unthread the cog, which then tries to turn the lock ring with
it. Since the lock ring is left hand thread, this serves to tighten
it against the cog, preventing it from moving.
You can cheat for spring training by using a regular hub. Get a
track cog with the appropriate number of teeth. Thread it onto your
hub, then thread on a bottom bracket lock ring. Pull the cog up
tight, then pull the lock ring up tight against it. This isn't as
foolproof as the genuine article, but spring training in a fixed
gear should be somewhat less demanding than sprinting with Nelson
Vails.
Using an overweight clunker frame is not a real good idea since
you should be able to find a Raleigh Super Course or other decent
frame (used, of course) pretty cheaply.
There are (or were) some inexpensive track bikes on the market.
Paul Randazzo at Category 1 Cyclegoods was selling a Viener (sp?)
made in Italy for about $300 if I remember correctly. He has one
for his own use and it is a very decent training bike.
|
124.3 | save weight - no changers | RDGENG::DEARLOVE | Mike | Wed Aug 06 1986 18:15 | 26 |
| re .1
- Why not leave the brakes on the bike. They might prove useful
on a road bike.
- Why not fit a single fixed gear to the threads on which you normally
fit the freewheel. You should really fit a lockring but you can
proably get away without it.
- If you modify a five speed wheel to a fixed you may have to re-dish
the wheel and alter the spacings on the axle.
I have friend building me a 'fixed' racer as described above from
parts lying about in his 'dining room'. We could start a whole new
notes file just discussing his dining room !!!.
If he manages to get this thing built before I die (slow worker)
I hope to find out how good it is as a training bike.
Now did anybody mention what gear to use - how about 65 inches.
(just been reading about 120 tooth chainrings but I will have to
work up to one of those - probably good for bikeling down Everest)
Mike
|
124.4 | track bike as road training? | SSDEVO::HOFFMAN | | Wed Aug 06 1986 18:48 | 12 |
| I didn't think people still rode fixed gear bikes on the road.
It used to be encouraged for spring training, the theory being
that it forced you to spin, thus developing pedaling technique.
Since then, I read that it was still a good idea to do spring
training in lower gears, some times enforced by putting a single
cog on, but making it a freewheel. The thinking here was that
the fixed gear made it easier to only apply power on the
downstroke.
While it is loads of fun to descend a hill on a trackbike
fitted with a 65 and backpedal to a stop at the intersection
at the bottom, I don't know what training value it has.
|
124.5 | | APOLLO::DEHAHN | | Thu Aug 07 1986 09:30 | 33 |
|
Then you just haven't ridden one enough.
Training bennies:
forces you to concentrate on a smooth spin and power transfer
Keeps you out of dangerously high gears when your muscles are weak
and tendons/joints are not well supported by them
track bikes use short cranks, less leverage available so you really
have to work to climb
short cranks also make developing your jump easier, great for sprint
work
track bikes are also short wheelbase, very harsh riding on the road, will
condition your derriere for the many miles ahead
maintenance is much easier, just spray with gumout and hit it with
a hose, great for the dirty NE spring
There are many more reasons, as you can see I'm a F/G advocate.
BTW I use a Urago frame (carbon steel seamed tubing, rusty) with
mostly Campy Piste components except the wheels which are Pellisier/
Mavic Sport($4.00 each!). Total cost was $140.
Don't knock it until you try it. Riding F/G takes some getting used
to.
CdH
|
124.6 | I havn't done it since I got my new toys (bikes)... | EUREKA::REG_B | The micro_wave popcorn gourmet | Thu Aug 07 1986 09:57 | 8 |
|
Guilty, but not lately. Longest day ride in recent years,
double metric, fairly hilly. Have brakes but, as any fixed wheel
snob knows, its a matter of pride to never use them. Was riding
51 x 19, with a 16 on the flip side, up until end of '84.
Reg
|
124.7 | | SUPER::CONNELL | | Thu Aug 07 1986 10:09 | 13 |
|
I rode a fixed gear during early season training for two years.
Really enjoyed it.
Raced on one once in a criterium -- one of the most painful
experiences of my life -- it used these strange muscles I didn't know
I had inside my thighs -- couldn't sit or stand for the rest of the day.
Never again.
Train in a 48/21: equivalent to a 42/18 or so.
Chuck
|
124.8 | Ounces | SHIVER::JPETERS | John Peters, DTN 266-4391 | Thu Aug 07 1986 13:45 | 2 |
| re .1, Epoxy is pretty heavy in the quantities required to
fill a freewheel...
|
124.9 | My trash, er, TRACK bike.... | SUSHI::KMACDONALD | Engineer on the Train of Thought | Thu Aug 07 1986 15:21 | 11 |
| My track bike is an old Nishiki touring frame, DB tubing, 43" wheelbase.
For a while I used a derailleur hub, fixed cog and bottom bracket
lockring (REQUIRED for this to work); now have a real track hub. Track
bikes seem to be kinda hard on spokes; keep in mind if building track
wheels for training. Bike also comes with 1 brake (front) and 1 fender
(rear), clincher tires. Great for sloppy weather commutes; essential for
icy weather commutes. Fixed gear gives more control for stopping in the
slippery, by my reckoning.....
keep on trackin'
ken
|
124.10 | Parts for another approach...? | ASIC::NBLIAMPTIS | multiprocessing as a way of life | Wed Dec 23 1987 13:31 | 10 |
| RE: .2 etc.
I'd like to try riding a fixed gear bike early next year.
Track cog and BB locking ring on a regular hub sounds like a good
plan. Although I might be able to find the locking ring, I've never
even seen a track cog. Can anyone suggest a good place to find these
parts (or a whole fixed wheel for that matter)?
Thanks,
Nick B...
|
124.11 | | MENTOR::REG | | Mon Dec 28 1987 09:21 | 16 |
| re .10 Depends where you are located. ASIC:: doesn't suggest
a geographic location to me.
BB lock ring on a "regular hub" (whatever that is) sounds dangerous
as all hell to me. Spend the bucks and do it right, last thing you
want is it all coming undone at 25 + MPH.
Anyway, now is a good time to be looking for fixed gear stuff.
The gift shopping stuff is over with and fixed for spring training
is what bike shops should be stocking up on. Find out where your
local racers hang_out/buy_their_stuff, thats where to shop for a
track hub. International in Alston ahs it all, OK if you're near
to Boston.
Reg
|
124.12 | Back to it this spring (well it was still winter) | MENTOR::REG | Keep left, except when not passing | Tue Apr 05 1988 11:15 | 28 |
|
I just rediscovered this old topic. As noted elsewhere I have
"had another relapse" and bought another fixed wheel bike. Its
slower and harder, but I've come up to condition faster this year
than in the past 3 or 4 (verified by timed rides on the derailleur
equiped bike). I love the extra control, I can tuck in behind someone
(that I trust) and hold within a a couple of inches of their wheel
for a long time without having to grab for a brake if they back off a
bit and then catch back the lost 12 or 18 inches again, speed/spacing
control is accurate at microscopic levels and its a lot less stressful
than trying to do it with brakes. I'm also back into jumping railroad
tracks, the technique of riding up on the rear pedal to gain body
height while losing speed, then pulling the bike up makes for some
Loonnnngggg jumps, just not practical with a freewheel and brakes. I
seem to gain ~100ft of road distance over other riders at track
crossings.
I'm dead against any of the epoxied freewheel suggestions, they
cost you a hub, they COULD come all undone at the worst possible moment
and it costs no more to get a wheel threaded fixed on one side with six
speed on the other, so you may as well do it right. I saw some of
these wheels made up at Goodale's in Nashua a couple of weeks ago, I
didn't ask the price, but its the cheapest way to try fixed riding,
since you get a whole "regular" rear wheel to use if you don't like it.
Reg
|
124.13 | fixed until spring | IC::NBLIAMPTIS | multiprocessing as a way of life | Mon Nov 21 1988 13:27 | 29 |
| Well, it took me a year, but this past weekend I picked myself
up a combination fixed/freewheel rear wheel with a 15 tooth cog on it
(did it right at International Reg).
First, I mounted it with too much slack, which allowed the chain
to slip. However, when I tried to remove two links, that made the
chain too short. So I replaced my 39 tooth chain wheel with a
42. This barely allows me enough chain length to safely attach
my rear wheel to the rear dropout of my Cannondale.
Damn near killed myself on the first test ride.... I tried to
"coast" after a standing sprint up a hill!
I'm still a little concerned about this setup so I have a few
questions;
Do only certain freewheel/cog combinations work on a bike of a
given chainstay length?
Is there any way to determine this other than experimentation?
Is it worth it to remove the derailleur until spring?
How does one slow down sans brakes? All I can do is the reverse
of a jerky pumping motion. Will I eventually develop a smooth
pedalling in "resisting circles"?
What else should I know?
Nick B...
ps - Reg, if you jump RR tracks do you peddle in the air, or rip your
legs off when you land and have to peddle at 25 mph again? For the
forseable future this is a purely academic question.
|
124.14 | | SUSHI::KMACDONALD | loose chips sink mips | Mon Nov 21 1988 14:58 | 16 |
| > Is it worth it to remove the derailleur until spring?
> How does one slow down sans brakes? All I can do is the reverse
> of a jerky pumping motion. Will I eventually develop a smooth
> pedalling in "resisting circles"?
I've ridden a fixed gear bike for several years, at one point riding 20
mi a day commuting in Washington DC. I NEVER got to be able to stop the
bike well without brakes. I'd recommend getting at least a front brake
if you're planning to ride out in general society. For me, it seemed
like reverse pedalling was the moral equivalent of about 1/2 of a brake
for stopping power.
Take the derailleur off! Saves wear, looks kool, and by spring you
wouldn't want to put it back anyway! :-)
ken
|
124.15 | | WEA::BUCHANAN | Bat | Mon Nov 21 1988 19:01 | 11 |
| > First, I mounted it with too much slack, which allowed the chain
> to slip. However, when I tried to remove two links, that made the
> chain too short. So I replaced my 39 tooth chain wheel with a
> 42. This barely allows me enough chain length to safely attach
> my rear wheel to the rear dropout of my Cannondale.
I've never riden one so... Does the Cannondale have vertical dropouts? If so
then it doesn't seem like there is any way to adjust the chain. Seems that you
need the "normal" dropouts where there is about an inch of movement which
should be more than enough. Don't track bikes have dropouts that open straight
back?
|
124.16 | Braking at 140RPM? | EIEIO::LITSIOS | | Tue Nov 22 1988 04:06 | 20 |
| Having ridden a fixed wheel bike for years I think I can add some
knowledge here.
>> How does one slow down sans brakes? Will I eventually develop
>> a smooth pedalling in "resisting circles"?
Yes. Although it will never be as good a brakes.
>> What else should I know?
Two words of caution.
1) Make sure the rear sprocket is as tight as possible and then put a
second "toothless sprocket" to lock it in.
2) Remember that you will be pedaling all the way through the turns.
Use shorter cranks if you have them or never forget to slow down...
Ken
|
124.17 | Hold at 200 RPM; for a count of 200.... | MENTOR::REG | these specs are only for reading... | Tue Nov 22 1988 09:27 | 21 |
|
Yeah, WayTaGo !
Only an opinion, but I'd guess you're geared a bit high. Awww,
I *_KNOW_* it feels kinda weird to be spinning so fast ALL THE
TIME, but its a thing you get used to, just don't try to ride as
fast as you used to ...YET ! Try to get down closer to mid/low
60 gear inches, for now anyway. Re braking, yes, it takes a while
to develop smooth hold back 'resistance circles', whatever. It
also takes a while to develop the other sets of muscles that you
need for this - another reason for lower gearing. As a very rough
check, you should be able to lock the rear wheel at ~12 - 15 MPH
on a decent road surface, if not then gear down until your holding
back muscle group develops more. I like to use a chainring closer
to 50 teeth, it makes 1 tooth rear cog changes smaller. Re; taking
the rear shifter off til spring - why put it back on, EVER ?:-^)
Re; landing after jumping railroad tracks - Oh, I just lay a 30ft
strip of rubber(Yuk, yuk, yuk; well, you DID ask).
Reg
|
124.18 | Bigger chainring makes cog changes smaller? Nah! | SMURF::BINDER | And the quarterback is *toast*! | Tue Nov 22 1988 09:51 | 13 |
| Re: .17
> I like to use a chainring closer to 50 teeth, it makes 1 tooth rear
> cog changes smaller.
>
> Reg
Aw, c'mon, Reg, don't pull that line. A change from 14 to 15 teeth in
the back is exactly the same percentage of difference, regardless of
what size the chainring is, namely 7.143%. It's also exactly the same
amount of chain takeup change, namely one-half of a link.
- Dick
|
124.19 | b'sides, it LOOKS harder to ride:-^) | MENTOR::REG | these specs are only for reading... | Wed Nov 23 1988 12:24 | 9 |
| re .18 Nah to your nah !
What I had mean was if one is running on about a 50 tooth wheel
up front then the cog at the back will be closer to 20 than the
16 or so that one would use with a 40 or so toothed wheel up front.
i.e. 5%'ish steps vs 7%'ish.
QED & all that stuff ?, right, lets ride.
|
124.20 | I see, said the blind man... | SMURF::BINDER | And the quarterback is *toast*! | Wed Nov 23 1988 15:05 | 7 |
| Re: .19
Okay, now I see what you mean. You're right, and it also makes a setup
that will last longer because it suffers slightly less wear. So let's
ride!
- Dick
|
124.21 | Fixed until ... when? | ASIC::NBLIAMPTIS | multiprocessing as a way of life | Mon May 08 1989 14:48 | 13 |
| I've been using a fixed rear wheel since December, although
I didn't do very much riding until February. This is the first
year I've used a fixed wheel.
I believe it's helped me get into shape faster with less stress
on my knees than in previous years.
However, at some point I believe I will be getting diminishing
returns from continued fixed riding. I've put on ~600 miles including
a couple ~50 mile rides, and I'm starting to get tired of "fixed
wheeling".
The question;
When do you put on you put on your freewheel back on and why?
|
124.22 | Take it off now | CURIE::WAGNER | | Wed May 10 1989 11:41 | 18 |
| I am a real believer in the benefits of fixed gear training. I
started using one when I lived and raced in Southern California.
The fixed gear is best used as you begin to build your mileage base
before the season begins. I always use it for 1-2 months. Out
west I'd put it on in December and remove it at the end of January,
with about 800-1200 miles on. Out here, this season, I started
with it about the middle of January and took it off about the middle
of March with about 500 miles on.
The fixed gear helps develop a nice round pedaling style and a smooth
spin. However, if you're into racing, you also need to be concerned
about speed, strength, climbing, sprinting, etc., and a fixed gear
won't give you those.
That's my 2 cents worth.
Jim
|
124.23 | 42x15 Fixed Gear Fun | ODIXIE::RRODRIGUEZ | Where's that Tour d' France thang? | Wed Nov 18 1992 15:24 | 27 |
| I took the plunge today and went 14 miles on a fixed gear set-up.
It was BIG fun. It certainly takes concentration. I had never
realized how often I coasted. For instance, when raising to sort
out the wrinkles in your shammy--I almost killed myself!
I also get about a quarter inch off of the saddle to go over a bump.
I just have to get used to raising up while keeping my feet moving.
I think I'm going to enjoy this...
FWIW: A few pointers that I'll watch out for next time.
1. Give other riders enough space to "let-up", or in a worst case,
cut you off.
2. Even though I used my "trash-bike" I'm going to switch my
strapless peddles from my good bike over to it. I had to
pull out of the binding once, and I had to lean on a mail box
before I could get resituated. I just couldn't follow that peddle
around with my foot at 90 r.p.m.--forget strapping in! I'd welcome
any hints!
3. RELAX! I found that relaxing my legs on hard downhills was more
effective than trying to spin at 120 r.p.m. I still expect to
go through some brake shoes this winter : )
r�
|
124.24 | | MOVIES::WIDDOWSON | Rod, OpenVMS Eng @EDO | Thu Nov 19 1992 04:55 | 15 |
| r�,
Welcome to the converts ! Fun isn't it, what gears are you using ?
> I'd welcome any hints!
Track-stands ?
FWIW I always use Looks for f-w (because I cannot track-stand), I also
have to use my good bike since my other bike has vertical drop-outs.
Do you find that when `coasting' you are stretching your hamsstrings
much more than ususal ?
/rod
|
124.25 | | KIRKTN::GGOODMAN | Born loser | Thu Nov 19 1992 06:03 | 12 |
|
Little hint (you may already be doing it, if so ignore me...):-
Have you got brake calipers that have the little adjuster to change the
distance from the rim to brake block? If so, set it up so that when it's
closest it's actually rubbing the rim. When descending flick it to it's
closest setting so that you are in effect constantly braking while
descending. Let's the mind concentrate on other things such as keeping
pedalling...
Graham.
|
124.26 | 42-17 | VO2MAX::DELORIEA | I've got better things to do. | Thu Nov 19 1992 11:09 | 20 |
| I've had two fixed gear wheels that I built. The first I sold to Mark Reid who
is in this conference whne I needed some money. The fixed gear wheel I built this
past time was from an inexpensive Mallard track hub. I took out the solid short
axel and put in a normal 7 speed hollow axel with spacers. For the rim I looked
around for a good box section rim with strong double eyelets. The rim takes
more of a beating than a regular rear wheel does, so build it stronger than
normal. I found an old tubluar rim that was just what I wanted. Tubluar tires
are great for soaking up road imperfections. They also hold the road better than a
clincher. With normal three cross lacing I built my wheel in an evening.
Riding:
The first time you ride a fixed gear you want to find a flat as possible route.
It's not the up hills that get you but the down hills. Just get used to being
fixed before riding any serious training rides. Find out what gear you can use
by using your regular bike in that gear all the way through your training loop.
Just remember that you don't want to use a gear to low that will cause you to
spin uncontrolled on the down hills. Most of all have fun.
T
|
124.27 | If I can keep my knees off my chin... | ODIXIE::RRODRIGUEZ | Where's that Tour d' France thang? | Thu Nov 19 1992 15:48 | 27 |
|
Thanks for the help. Yes, I was surprised to find that the down-
hills made me more apprehensive than the uphills. The tip about
letting the brake shoes rub is great!
Yes, my hamstrings felt like it was a twenty-four miler, not
fourteen. I figured it had more to do with how tense I was than
what kind of work I was doing(?)
I am using a 42X15 (75.6 inches) with a very broad chain. The hills
around the Alpharetta CSC are mostly 1/2 mile or less in length. I
normally use a 52/42 x 13/23 in this area. I am using a wired-on
Weinmann box rim with an old Shimano 600 hub that I got "second
hand" from a bike shop. I have an old Mavic front wheel in a closet
that I plan to mount a tire on so that trash my "so-fine" MA40/Dura-
Ace front wheel by slamming over hazards...
This was just going to be an experiment for me, so I was trying to
keep as much of the "good stuff" off of the bike as possible. Judging
from the components mentioned, you guys are heavily committed to this
BONZAI!!! form of training. I plan to put in five or six hundred
miles like this before going back to the freewheel.
Thanks for the encouragement!
r�
|
124.28 | Progress Report | ODIXIE::RRODRIGUEZ | Where's that Tour d' France thang? | Fri Dec 18 1992 13:03 | 15 |
| I've been doing some asking around and it seems that most of the
people riding F/G are using a 70 gear or lower. I am doing this
for the first time and I chose a 76 gear--more of a blind choice
than the macho choice. Maybe you guys have steeper hills than we
do?
On the other hand, while I am quite comfortable with my 42x15 set-up,
I don't ride it nearly as FAR as some of you have mentioned that you
ride. I do a couple of lunch hour rides (14+ miles) and a 25 mile
weekend ride in addition to cross-training (swim/bike).
So far so good. Am I headed for trouble? or does my configuration
somehow cause me to miss out on some of the benefits of F/G riding?
r�
|
124.29 | | MASALA::GGOODMAN | | Fri Dec 18 1992 14:58 | 9 |
|
What revs are you doing. If you are averaging 90-100 revs on the flat,
then wahetever suits you. If you are usually a big gear masher and this
gear lets you mash at the same rate I'd advise you to gear down a
little. This is a good time to try and spin more (which IMHO, is the
better way to ride) and will also lessen the chance of knee injury as
the cold sets (has already set?) in.
Graham.
|
124.30 | Guess I'm Okay? | ODIXIE::RRODRIGUEZ | Where's that Tour d' France thang? | Mon Dec 21 1992 10:35 | 14 |
| Thanks for the info. My revs vary greatly, of course. On my
"beaten path" there are at least four downhills in which I am
sure I hit 120+ rpm's, but I've taken the cadence gadget off
of that bike. I've used cadence extensively, so I have a rough
feel for what my spin rate is. It drops to around 60 on the
uphills. I tend to spin a bit higher in the level areas than
I would have shifted into if I'd had a freewheel & dreaileurs!
Anybody out there ever noticed how "big" cyclists seem to have
more difficulty keeping a high cadence than others? I normally
spin in the mid eighties ( 6'0" 195 lbs.). This F/G riding has
smoothed the "bounce" out at a higher rate, though.
|