Yes it is a French invention, but it was an Italian, Tullio Campagnolo who applied the physics of geometry and artistic style to this device to create the modern parallelogram derailleur that functions beautifully.
Tullio also invented the quick release skewer, which we Americans have had such difficulty learning how to use properly that we have legislated against this fantastic invention, with lawyer bumps being required on forks that effectively render the quick release skewer useless. Dumas 'Mericans!
Stanglor
Posted: Fri Aug 03, 2007 11:31 am
Joined: 28 Jan 2006Posts: 555Location: Wallingford
A belt sander and 30 seconds takes care of the lawyer tabs. It's the only way to go.
_________________ Confidential to everybody: "Pearl necklace" is out. "Cheney" is in. Pass it on.
the dreaded ben
Posted: Fri Aug 03, 2007 11:35 am
Grumpy GreebJoined: 20 Aug 2005Posts: 5329Location: flavor country
i gotta go with the wheel.
bott
Posted: Fri Aug 03, 2007 11:39 am
will kill you in your sleepJoined: 27 Jul 2005Posts: 868Location: Landlandia
the 'love channel'
Happy Stick Person
Posted: Fri Aug 03, 2007 11:48 am
Joined: 20 Sep 2006Posts: 1168Location: Leschi
only topped by...
MyNameIsJeff
Posted: Fri Aug 03, 2007 12:28 pm
BOOSH!Joined: 17 Jul 2007Posts: 2042Location: Nearest bar.
I think my favorite part has to be the
_________________ See you in Hell.
pete jr
Posted: Fri Aug 03, 2007 12:45 pm
Joined: 13 Dec 2005Posts: 1930Location: balls deepx
Alex
Posted: Fri Aug 03, 2007 12:52 pm
Joined: 18 May 2006Posts: 3128Location: Roosevelt
coupdegrace wrote:
Yes it is a French invention, but it was an Italian, Tullio Campagnolo who applied the physics of geometry and artistic style to this device to create the modern parallelogram derailleur that functions beautifully.!
That isn't really true. All modern deraillleurs use the slant parallelgram design that was created and patented by Suntour in 1964. Suntour is a Japanese company. When the patent expired pretty much everyone adopted the design.
The book "The Dancing Chain" covers this in great detail. I bet that Aaron even has a copy in the ABR library.
alex
zanimal
Posted: Fri Aug 03, 2007 1:11 pm
Joined: 06 Sep 2006Posts: 135Location: West Seattle
Suntour made them. Campagnolo made them beautiful.
coupdegrace
Posted: Fri Aug 03, 2007 1:37 pm
Joined: 01 Nov 2006Posts: 168
Stanglor wrote:
A belt sander and 30 seconds takes care of the lawyer tabs. It's the only way to go.
Or buy an Italian made fork or bike that was not made to be exported to the US of Asses.
My Favorite part is a Columbus Nueron frameset hand assembled by Antonio Mondonico.
Last edited by coupdegrace on Fri Aug 03, 2007 4:00 pm; edited 1 time in total
coupdegrace
Posted: Fri Aug 03, 2007 1:49 pm
Joined: 01 Nov 2006Posts: 168
Alex wrote:
coupdegrace wrote:
Yes it is a French invention, but it was an Italian, Tullio Campagnolo who applied the physics of geometry and artistic style to this device to create the modern parallelogram derailleur that functions beautifully.!
That isn't really true. All modern deraillleurs use the slant parallelgram design that was created and patented by Suntour in 1964. Suntour is a Japanese company. When the patent expired pretty much everyone adopted the design.
The book "The Dancing Chain" covers this in great detail. I bet that Aaron even has a copy in the ABR library.
alex
The first derailleur that worked by moving the chain with an articulated parallelogram, called a cage, operated by cables, was made by Tullio Campagnolo in 1949. That model used two cables.
The first single cable parallelogram derailleur was Campagnolo’s Gran Sport, made in 1951. This derailleur would be recognizable as a modern derailleur, and is very similar to current designs.
In 1964, Suntour invented the slant-parallelogram rear derailleur, which allows the jockey wheels to maintain a more constant distance from the different sized sprockets, resulting in easier shifting. Once the patents expired, the other manufacturers adopted this design ...
We are both correct!
Alex
Posted: Fri Aug 03, 2007 2:19 pm
Joined: 18 May 2006Posts: 3128Location: Roosevelt
Shouldn't be a surprise since this is also my avatar...
Cranks are universal. You can't really have a bike without them. They are one of the three human interface parts and the one most tied towards getting leg power to the road.
The mid-90s Ritchey Logic are my favorite despite the large ugly logo. They are strong, light, have a low tread (Q-factor), run nicely as a double or triple, have the stronger and more elegant hidden 5th arm in the spider, and a great finish. I have them on almost all of my bikes and a few spares just in case. They made them in 110/74 and 94/58, the best BCDs ever offered.
alex
john
Posted: Fri Aug 03, 2007 2:20 pm
AAAARRRRRGGGGbllll pppphtt!Joined: 26 Aug 2006Posts: 725Location: In the lab.
record hubs.
only thing better is a slight modjob.
_________________ In der Not frisst der Teufel Fliegen.
Joined: 25 Jul 2005Posts: 5547Location: Columbia City
john wrote:
record hubs.
only thing better is a slight modjob.
I rode Alister's bike for first time with his new wheelset yesterday at Westlake. The ceramic bearings coupled with Phil hubs, is seriously nice
dennyt
Posted: Fri Aug 03, 2007 2:53 pm
rocket mechanicJoined: 02 Aug 2005Posts: 2708
langston wrote:
I rode Alister's bike for first time with his new wheelset yesterday at Westlake. The ceramic bearings coupled with Phil hubs, is seriously nice
I'll buy a six pack for anyone who can show me test data that shows a statistically significant difference in rolling resistance between a phil wood w/ ceramic balls and a bone stock shimano hub, as measured through a rolling tire test.
Tire variability will probably swamp out all of that bling.
martin
Posted: Fri Aug 03, 2007 3:11 pm
Joined: 30 Jan 2006Posts: 712
dennyt wrote:
langston wrote:
I rode Alister's bike for first time with his new wheelset yesterday at Westlake. The ceramic bearings coupled with Phil hubs, is seriously nice
I'll buy a six pack for anyone who can show me test data that shows a statistically significant difference in rolling resistance between a phil wood w/ ceramic balls and a bone stock shimano hub, as measured through a rolling tire test.
Tire variability will probably swamp out all of that bling.
"According to reports from real world testing done by ZIPP sponsored Team CSC an average reduction in wattage of three to four percent under our standard bearing systems, already the tightest standard within the industry can be expected. For an average trained cyclist developing 250 watts, that's a savings of approximately 10 watts. At any level of competition, that is significant. The key is every part of the bearing system has seen marked improvements in precision resulting an a total benefit greater than the sum of its parts. Similar to current math theory, at some point numbers reach a point where the rules just don't hold true any more. "
john
Posted: Fri Aug 03, 2007 3:24 pm
AAAARRRRRGGGGbllll pppphtt!Joined: 26 Aug 2006Posts: 725Location: In the lab.
ah doo bereive dawts uh beeer dennehtee...
udderwize we needa godawn ta norwesta laradories un gimmem sommin bikey thangs annun dat'd cawst a beechin buncha beer munnah an'n we's dunnin wannin tado dat!
_________________ In der Not frisst der Teufel Fliegen.
3-4%? I thought the total drag from bearings was less than that, or close to it. Anybody have a copy of Bicycling Science on hand? I'll have to look it up at home.
And I said test data, not hand-wavy stuff from a marketing guy.
Besides, Andrew (martin) doesn't drink. :)
TrikerTrev
Posted: Fri Aug 03, 2007 3:33 pm
Joined: 23 Oct 2006Posts: 2303Location: FOCO, MOFO!!!
mmmmm, titanium!
_________________ Insufferable ass, est. 1969
martin
Posted: Fri Aug 03, 2007 4:18 pm
Joined: 30 Jan 2006Posts: 712
dennyt wrote:
And I said test data, not hand-wavy stuff from a marketing guy.
I warned you!
btw - my favorite:
The drop handlebar. Beeeeea-utiful.
jeff
Posted: Fri Aug 03, 2007 4:36 pm
SOC pussyJoined: 05 May 2006Posts: 4501
If you rolled old-school ABA or USBA you had to have a pair of these.
gsbarnes
Posted: Fri Aug 03, 2007 8:07 pm
Joined: 15 Aug 2006Posts: 2666Location: No Fun Town, USA
dennyt wrote:
3-4%? I thought the total drag from bearings was less than that, or close to it. Anybody have a copy of Bicycling Science on hand? I'll have to look it up at home.
And I said test data, not hand-wavy stuff from a marketing guy.
What? Are you implying that 'similar to current math theory, at some point numbers reach a point where the rules just don't hold true any more' is not an intellectually rigorous statement?
_________________ I have always thought in the back of my mind: Cheese and Onions
zuvembi
Posted: Sat Aug 04, 2007 6:18 am
Joined: 24 Jul 2005Posts: 942Location: Little Addis Ababa
dennyt wrote:
3-4%? I thought the total drag from bearings was less than that, or close to it. Anybody have a copy of Bicycling Science on hand? I'll have to look it up at home.
Yup, it's bullshit. Standard watt dissipation in a hub is about 1/2 watt. Ceramic bearings might gain you a five percent reduction in friction, theoretically. In reality, they're more fragile and not really designed for bicycle applications.
In other words, it's marchitecture, not engineering or design.
Fuck, my generator hub, which is a totally different order of beast only absorbs 2 watts.
Quote:
And I said test data, not hand-wavy stuff from a marketing guy.
"Hello." he lied. --Marketing agent (for anyone).
_________________ When the revolution comes, we're going to need a longer wall
Remington
Posted: Sat Aug 04, 2007 6:22 am
Joined: 23 Jan 2006Posts: 457Location: Remington Country
Strong wheels. These things still didn't need to be trued after 2 months of use/touring, until a branch flipped up into the rear spokes the other day.
Aaron and Nygard might like this photo.
To everyone who can tell I'm kissing ass trying to get a larger discount, shhhh...
dennyt
Posted: Sat Aug 04, 2007 11:27 am
rocket mechanicJoined: 02 Aug 2005Posts: 2708
Bicycling Science 2nd Edition P. 142 wrote:
bearing losses... 2 percent of total drag on a bicycle at 20mph
eternalignorance
Posted: Sat Aug 04, 2007 12:32 pm
Joined: 08 Jan 2006Posts: 359Location: Imaginary Places
LUGS! So many shapes and sizes and oh so pretty.
Aaron
Posted: Sat Aug 04, 2007 10:10 pm
Joined: 25 Jul 2005Posts: 4645
Those are some sexy lug pictures!
Thanks everyone for the bike love!
Bikes are what we all love!
the dreaded ben
Posted: Sun Aug 05, 2007 12:12 am
Grumpy GreebJoined: 20 Aug 2005Posts: 5329Location: flavor country
Jeff was close but these make me wetterist
196 grams! !!!!!!!!!!!!!!!!wowie zowie!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
the dreaded ben
Posted: Sun Aug 05, 2007 12:40 am
Grumpy GreebJoined: 20 Aug 2005Posts: 5329Location: flavor country
super efficient bike duds can't be discounted either
keyholefish
Posted: Sun Aug 05, 2007 8:05 am
Joined: 25 Jul 2005Posts: 268Location: somerville, ma
the dreaded ben wrote:
super efficient bike duds can't be discounted either
zipp marketing guy wrote:
He saves over 150 grams in fabric weight, and much like current theories of humpback whale hydrodynamics, his ample hair improves boundary layer mechanics by 10-15%.
Remington
Posted: Tue Aug 07, 2007 6:36 am
Joined: 23 Jan 2006Posts: 457Location: Remington Country
zipp marketing guy wrote:
He saves over 150 grams in fabric weight, and much like current theories of humpback whale hydrodynamics, his ample hair improves boundary layer mechanics by 10-15%.
Pfff, I'd rather train with heavy water, and then switch to 'water with gas' for the race.
gsbarnes
Posted: Tue Aug 07, 2007 9:59 am
Joined: 15 Aug 2006Posts: 2666Location: No Fun Town, USA
Remington wrote:
zipp marketing guy wrote:
He saves over 150 grams in fabric weight, and much like current theories of humpback whale hydrodynamics, his ample hair improves boundary layer mechanics by 10-15%.
Pfff, I'd rather train with heavy water, and then switch to 'water with gas' for the race.
Feh. I've already told you that steam is the answer. It's lighter than air, so it's negative weight! Put steam in your bottles!
_________________ I have always thought in the back of my mind: Cheese and Onions
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AAAARRRRRGGGGbllll pppphtt!
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rocket mechanic
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