Current Projects chat and miscellany

still dont quite understand what 10 pitch is.... sorrry

"Metric chain - Shimano designed chains with a 10 mm pitch instead of the conventional half inch pitch as well as sprockets and chainrings for use with this metric chain; however this did not catch on. For a time 10 mm pitch chains, sprockets, and chainrings, were used for motor-paced racing, to reduce the size and weight of the transmission system."

smaller links = smaller sprockets for the same gear inch. Also lighter. They weren't allowed for use in Japanese Keirin as they were seen to give an advantage so Shimano stopped production after a couple of years.

smaller links = smaller sprockets for the same gear inch. Also lighter.

Also higher chain tension, more chain bendáge and corresponding lower efficiency. Changing pitch doesn't get you round the fundamentals of roller chain transmission physics, and all the "advantages" of 10mm pitch were also claimed for MicroDrive, using lower tooth counts on ½" pitch, equally fallaciously. You get the same effect by using 40/16 ½" pitch as you get from 50/20 10mm pitch. Yes, the mini drive train is lighter (although small ½" pitch is better than 10mm in this respect, since you also cut the number of rollers, bushes and pins), but light weight is not something to chase after at the track if it compromises drivetrain efficiency. That's why nobody* uses 12t sprockets at the track, you're always better of with a 13t and a bigger chainring.

*Some tosser will now find an example, e.g. Obree, but he's a freak.

12t sprockets are quite difficult to find and also the smaller the sprocket the more wear you get on the sprocket, which then wears out the chain, which then wears out your chainrings

NOS Miyata Team Pista 1986

Great build.

Jealous!

VP components something, sold locally under "Konstruktor" brand. very nice, seald bearings, light etc.

You know it needs PD-7400, don't you?

thanks for the info
but i still think it will look better with a bigger chainring that all
(i am still very jealous)

i feel you've missed the point some what

dura ace 10 pitch = diamond encrusted rocking horse shit

i don't think he has.
aesthetically it would (in his opinion) look better with a bigger chainring, simple as that.

also it's a great looking build.

personally i wouldn't run a different pitched chain with no advantages at all just for the sake of it though. chains are something i'd like to be able to replace.

restoring this now, funny how i have lots of friends when i can get them a cheap bike!

sadly it may get a flat or riser bar

You know it needs PD-7400, don't you?

hehe, them contact points, i can do whatever i want, right?*

to others - thanks, and yes, i have all the spares

• simply ran out of cash...
  

new road racing proyect

frame its a little small for me but im going to try make it fit
frme is a bernardi tratto with 1" full carbon fork. 1200g frame, 350 g fork

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It's been like this all winter now, and it won't be changed from here on in:

@scorch - that's a beautiful bike. Top work!

thanks guys

i feel you've missed the point some what

i do understand
aesthetically more pleasing with a bigger chainring-only my opinion

heh
i have seen so much less understanding of the build on the Moscow forum, basically zero
aesthetics is one thing, and it's realy cool and macho-looking to run 54/14 in usual gearing, but DA10 transmission is different, you know? different. that's the key word here.

dismantling this for the new owner...

i love it ;)

Got bored of the Nitromors (apparently some forms of paint are much less susceptible to it's powers) so took it to the shot blasters. Got the old headbadge holes filled by the guy opposite at the same time.

Not the neatest brazing but then again I always knew that... off to the powder coaters this afternoon hopefully.

that looks like the thinnest top tube

reminds me of this

Or it's a mixte frame that I'm building for my girlfriend.

haha! fair enough.