![]() |
Originally Posted by spartanKid
(Post 20141865)
Aluminum track cogs seem like a huge risk for little reward, but maybe I'm wrong.
Putting a sharks tooth grind on the tooth shape helps. http://i.imgur.com/6c96QWg.jpg Cutting them like a regular steel cog is no good. http://i.imgur.com/MZ2gFAt.jpg It also helps if they are 1/8th inch and not 3/32nds. |
If it was aluminum, it's not worth the few ounces saved especially assuming he rode like a 12 or 13t. I've owned one. Used it once and tossed it.
|
I believe it was carbon
|
Originally Posted by Poppit
(Post 20141973)
I believe it was carbon
My teeth are worth more than the few ounces saved. |
He was using a road chainset/chain combo as well
|
Originally Posted by Poppit
(Post 20141979)
He was using a road chainset/chain combo as well
I'll bet a dollar to a dime that the next time you see him, he'll be on a proper track crankset with common chainrings and cogs. |
those british fellas put some power data on strava from their Minsk World Cup win.
Their TP starts with 20 seconds at 1000w, a minute at 650w, and overall, about 4 minutes at 530w. A ****load of power, god damn. |
Originally Posted by queerpunk
(Post 20142611)
Their TP starts with 20 seconds at 1000w, a minute at 650w, and overall, about 4 minutes at 530w. A ****load of power, god damn. That's wild |
Originally Posted by queerpunk
(Post 20142611)
A ****load of power, god damn. |
It wouldn’t just be about weight, it’ll be about watts and feel, e.g. http://www.peekrings.co.uk/
|
A chainring is one thing. You typically have around 3-4x more teeth in contact with the ring than a cog would, yet they both have to deal with the same amount of force being transmitted through them (via chain tension). Add the differing leverage ratios due to the differences in diameters, and the amount of force on each individual tooth is compounded many times.
To me, passing on a carbon cog would seem to be a no-brainer. On the other hand, I would test out carbon rings if they were available to me. |
On the topic of mantis like positions, this has changed a little since the word cup.
59.759 https://www.ridemedia.com.au/wp-cont...e-Glaetzer.jpg |
My eyeball aerodynamics say that looks like a very slippery position. It's funny, because if you rolled his torso up at the hips a little, he would look like a normal pursuiter in the mantis position, but here, the mantis is so low that his forearms are still almost level, yet still able to close off the airspace in front of the torso.
It looks like compared to his last position, his hands are basically raised "one hand width". The crappy thing about this, only 2 news agencies have picked up on the story from what I can see. |
It's the kind of position that only tall people can achieve with conventional gear - no short person can have a hip angle that can still generate power while being that folded up.
|
Originally Posted by taras0000
(Post 20143499)
To me, passing on a carbon cog would seem to be a no-brainer. On the other hand, I would test out carbon rings if they were available to me.
|
Originally Posted by taras0000
(Post 20143499)
A chainring is one thing. You typically have around 3-4x more teeth in contact with the ring than a cog would, yet they both have to deal with the same amount of force being transmitted through them (via chain tension). Add the differing leverage ratios due to the differences in diameters, and the amount of force on each individual tooth is compounded many times.
To me, passing on a carbon cog would seem to be a no-brainer. On the other hand, I would test out carbon rings if they were available to me. My thoughts would be along the lines that they might be more efficient/smoother or something along those lines, given the kgf guys do focus on small improvements |
Originally Posted by pierrej
(Post 20144908)
I'll admit I have no knowledge on the subject of carbon cogs, bit surely it's not in an effort to save weight as it would be one of the most negligible gains for obvious risks.
My thoughts would be along the lines that they might be more efficient/smoother or something along those lines, given the kgf guys do focus on small improvements |
Originally Posted by pierrej
(Post 20144275)
On the topic of mantis like positions, this has changed a little since the word cup.
59.759 https://www.ridemedia.com.au/wp-cont...e-Glaetzer.jpg Are there plans to take him to altitude and take a shot at Purvis' 56.303" that's been on the books since 2013? |
Originally Posted by Poppit
(Post 20144955)
Like I said about 5 posts ago
|
For all the Campy fans out there (which includes me when it comes to vintage Pista Record)
https://jalopnik.com/campagnolos-408...ory-1822278077 |
Originally Posted by carleton
(Post 20145074)
Jeez. I just realized that this is a new sea level world record. Wow.
Are there plans to take him to altitude and take a shot at Purvis' 56.303" that's been on the books since 2013? |
I'm usually all for carbon components (ran Fibre-Lyte chainrings on the road for years) but the rear cog... I dunno if I'm brave enough to try that.
I was playing with the idea of a big ring from aerocoach... but even that makes me nervous (plus it's quite a bit more than just a metal one) |
Hey Morelock, I tried sending you a PM about the IO clone you have that tested well. Do you have any info on which supplier it came from? I might be interested in getting one.
|
Originally Posted by rustymongrel
(Post 20146402)
Hey Morelock, I tried sending you a PM about the IO clone you have that tested well. Do you have any info on which supplier it came from? I might be interested in getting one.
AnglerWang1 was the ebay id. |
Originally Posted by taras0000
(Post 20145667)
I tried to find some data on Watt savings versus aluminum cogs/chainrings, and couldn't find anything. Any leads?
|
All times are GMT -6. The time now is 08:24 PM. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.