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Originally Posted by SyntaxMonstr
(Post 20179249)
Wait what's the reasoning here?
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I saw Colby Pearce picked up some Zen's in 3/32 the other day (from his instagram)
I'm not hip though... I like my big bulky 1/8 stuff :D Although If I find the "perfect" gear in time I might still end up going to 3/32... (and send it off to Atomic for some coating...) |
Going 3/32" isn't the end of the world. You just have to buy all of your own stuff new up front (used 3/32" is rare) and you probably won't be able to borrow anything in a pinch. But, borrowing should be rare.
With the chainrings being so big now, the weight savings could be significant. |
58/15 is what I'm thinking... but I need to ride it (and make sure it clears my track elite) a good bit to be sure. So currently just need a cheap 1/8 58t :D
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Originally Posted by Morelock
(Post 20179499)
58/15 is what I'm thinking... but I need to ride it (and make sure it clears my track elite) a good bit to be sure. So currently just need a cheap 1/8 58t :D
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Originally Posted by tobukog
(Post 20179436)
It's a joke. People usually fall into one of two camps, with 1/8 being the much larger group as far as I can tell, and it's often harder to find 3/32 in the the sizes you want. Sugino Zen is only 1/8, but my friend put together a special order/ request to have a run of large 3/32 rings. Endurance racers have often tended to favor 3/32. Morelock, who is looking for every last drop of wattage, would probably be better off on a 3/32. I have actually been using an 11 speed chain -- gasp!
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Originally Posted by SyntaxMonstr
(Post 20179572)
58 will clear a Track Elite. Friend of mine has a 60 on his.
nice, thanks! |
Originally Posted by SyntaxMonstr
(Post 20179576)
Oh, haha, I was wondering if there was some serious science behind it and I was just following dated trends. Thanks for the clarification.
There was talk of 3/32" providing better feel based on the chain chosen. 3/32" might be more elastic. This is stuff that I'm recalling from Fixed Gear Fever when it came up. I have no experience with 3/32". There are some prominent riders (enduros) that use 3/32". I raced with a guy that used 3/32". Strong enduro type, but could also lay down a mean 500M. It not any worse than 1/8"...just different. A side-grade, I guess. |
Originally Posted by carleton
(Post 20179653)
There are some prominent riders (enduros) that use 3/32". I raced with a guy that used 3/32". Strong enduro type, but could also lay down a mean 500M.
Originally Posted by spartanKid
(Post 20180271)
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Originally Posted by carleton
(Post 20179174)
Ummm...were you watching me at the track on Sunday? :foo:
I'm the old guy used to keep soft spinning on easy rollers between efforts, instead of almost sleeping on the ground. Not sure yet what's right, nowadays... |
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Originally Posted by Monkeyfudger
(Post 20182009)
It does offer left and right power measurement, which isn't a big deal. The biggest plus is the user-replaceable battery. The biggest downside seems to be the "< 5s" startup time (per official documentation). The price is $300 less than SRM. It seems to use the type of strain gauge that is plopped in the middle of the crank arm. I wonder if this hole in the crank arm affects how much torque the arm can handle before breaking. This might be a concern for the huge sprinters. https://www.bikerumor.com/wp-content...dy-to-race.jpg I love to see new Track Power Meters on the market. |
Yeah way too rich for me but I thought it was an interesting product non the less after reading your comments ref missing data from standing starts, seems they’ve tried to address this and also recognise that torque is also an important metric to be able to see/record.
Aye the always bang on about accuracy, it’s just something they have to mention to keep people interested. |
Originally Posted by Monkeyfudger
(Post 20182379)
Yeah way too rich for me but I thought it was an interesting product non the less after reading your comments ref missing data from standing starts, seems they’ve tried to address this and also recognise that torque is also an important metric to be able to see/record.
Aye the always bang on about accuracy, it’s just something they have to mention to keep people interested. The last power meter that was able to pick up early standing start data was the SRM Wired Track Cranks with PowerControl 5 head unit, using 2 reed switches. Standing start pickup time has less to do with a head unit "waking up" and more to do with the cranks rotating 2 full rotations (using 1 reed switch). That's how long it takes for a crank to calculate your cadence (time between each rotation). If you can complete 2 full rotations in 1 second, the head unit will start recording then. 2 reed switches helps because instead of 2 rotations being needed, you only need 2 HALF rotations...or 1 rotation :D But, this doubles your cadence readings which in turn doubles your power readings. So, the head unit has to be smart enough to halve the cadence data THEN calculate the power. SRM used to have a "2 reed switch" check box in its software, but to be compatible with others, it removed this. So, basically, SRM dummed-down the product to be more compatible :( |
This is also the result of the road-focus of the power meter products. "Who needs the first 5 seconds of a crit? I'm not even in my other pedal by then! lol..."
If the infocrank were truly making a track PM from the ground up, they would have taken this into consideration. More than half of the track events begin with a standing start. |
Haha, I’ve seen me take longer than that, nothing quite like that blind bit of panic when you fluff clipping in twice...
If they’re always going to rely on Ant+/Bluetooth then a track crank will always be unfit for purpose in my mind unless they do something different with the data. Perhaps a track specific PM as well as broadcasting on Ant+ as it does now should also be storing the data internally and start recording as soon as torque is applied so that torque and power can be analysed later. |
Originally Posted by carleton
(Post 20182834)
Standing start pickup time has less to do with a head unit "waking up" and more to do with the cranks rotating 2 full rotations (using 1 reed switch). That's how long it takes for a crank to calculate your cadence (time between each rotation). If you can complete 2 full rotations in 1 second, the head unit will start recording then.
2 reed switches helps because instead of 2 rotations being needed, you only need 2 HALF rotations...or 1 rotation :D |
Originally Posted by Monkeyfudger
(Post 20182888)
Haha, I’ve seen me take longer than that, nothing quite like that blind bit of panic when you fluff clipping in twice...
If they’re always going to rely on Ant+/Bluetooth then a track crank will always be unfit for purpose in my mind unless they do something different with the data. Perhaps a track specific PM as well as broadcasting on Ant+ as it does now should also be storing the data internally and start recording as soon as torque is applied so that torque and power can be analysed later. Wired is the way to go if you really care about scientific levels of data collection. Wireless is simply convenient and easy to install.
Originally Posted by jsk
(Post 20182992)
That would be true for magnet-based Cadence sensors, but is it true for accelerometer-based cadence? I know some of the pedal-based PM's supposedly record 30+ readings per crank revolution, I don't see why they would need two revolutions to start recording power.
The way that many head units calculate cadence is that they receive torque readings every so often: - 10NM @ 1:00:30 - 11NM @ 1:00:31 - 11NM @ 1:00:32 - 13NM @ 1:00:33 And then it says, "Thanks for the torque! I see that you (cranks) are sending me (head unit) torque every 1 second based on the elapsed time between each reading. I calculate your cadence to be 60RPM! From there I'll take that 60RPM and that torque and calculate your POWER!" This calculation can be made after 2 readings and updates after every subsequent reading. |
Ever wonder why some riders race international competition in their national team colors and other race for a pro team? Here's a good explanation why: https://www.beatcycling.club/en/blog...have-achieved/
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Originally Posted by carleton
(Post 20183713)
Ever wonder why some riders race international competition in their national team colors and other race for a pro team? Here's a good explanation why: https://www.beatcycling.club/en/blog...have-achieved/
It'd actually be really interesting if trade teams got to compete in Olympiad events or world championships. Like yeah, most of them are largely alt-teams for national squads, but you'd get a wider variety of representation from countries that might have promising athletes but no support or programmes in place to send them abroad otherwise. |
Saw in my email today that Flo Cycling is going to start offering their 6 / 9 wheels in track configuration. Nice option at that price range.
On an aside... I ordered my front Walker Brothers disc at the end of December... and it still hasn't been shipped. They've had some growing pains/family issues, but we're far enough out now that I am beginning to whine online about it... unfortunate because I really like their discs. |
Olympic Speed Skating.
I just saw the 1000m men's race winning time was just under 1m 8s - according to the commentator the guys in this event see 2-1/4 g. In cycling most g-forces are resisted by the saddle whereas in skating all the g-force goes though the legs. It used to be that speed skating was a perfect winter training for track cyclists (e.e. Heiden, Young) - I do not hear that anymore. |
Still its of crossover, at least in the Dutch team Laurine Van Riessen is a member of both the Dutch Olympic long track squad and the national sprint team.
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Apparently this is the new Cervelo T5....not sure if any difference to the GB T5 that was used in Rio? The bars are Hope, nice to see them branching out into track parts - i love their kit for mountain biking.
https://pbs.twimg.com/media/DW4VOmgWkAAIIgY.jpg |
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It looks fast
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Originally Posted by 700wheel
(Post 20187704)
Olympic Speed Skating.
I just saw the 1000m men's race winning time was just under 1m 8s - according to the commentator the guys in this event see 2-1/4 g. In cycling most g-forces are resisted by the saddle whereas in skating all the g-force goes though the legs. It used to be that speed skating was a perfect winter training for track cyclists (e.e. Heiden, Young) - I do not hear that anymore. |
Is there going to be a pursuit specific T5?
The pictures above one has an integrated cockpit and Kenny's has a more "normal" stem/bar. |
Originally Posted by Morelock
(Post 20192534)
Is there going to be a pursuit specific T5?
The pictures above one has an integrated cockpit and Kenny's has a more "normal" stem/bar. |
I am counting a 66x14 combo on Laura's bike -__-
I am also of the opinion that smaller frame won't have the dropped stem/headtube junction for engineering reason. Laura Kenny is 5'4''/1.63m so on 48 or 51cm frame. Meanwhile Katie Archibald is 5'10''/1.78m so probably on 56cm frame. Also if people are willing to share the source for those pictures I would like to have them. I always love to see track tech on instagram, website or even facebook. |
Originally Posted by Godsight
(Post 20193190)
I am counting a 66x14 combo on Laura's bike -__-
I am also of the opinion that smaller frame won't have the dropped stem/headtube junction for engineering reason. Laura Kenny is 5'4''/1.63m so on 48 or 51cm frame. Meanwhile Katie Archibald is 5'10''/1.78m so probably on 56cm frame. Also if people are willing to share the source for those pictures I would like to have them. I always love to see track tech on instagram, website or even facebook. |
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