Bike Forums

Bike Forums (https://www.bikeforums.net/forum.php)
-   Track Cycling: Velodrome Racing and Training Area (https://www.bikeforums.net/forumdisplay.php?f=210)
-   -   Interesting finds around the web (https://www.bikeforums.net/showthread.php?t=929230)

carleton 04-06-18 08:17 PM


Originally Posted by taras0000 (Post 20269460)
One place where tweaking may help is in grip diameter. Small or large hands may benefit from variances away from the standard diameter. Could help those with smaller hands when it comes to explosive starts.

+1

I've always wondered why we use the same diameter that was set by road bikes.

Barbells come in at least 9 different diameters, from 22.2mm up to 32mm: https://www.roguefitness.com/weightl...lates/barbells

Yet 125lb sprinters use the same off-the-rack sprint bars as 250lb sprinters. Just doesn't seem right.

FES makes different bars for every sprinter in this photo:

https://i.imgur.com/ckOJ6hE.jpg

carleton 04-06-18 11:05 PM


Originally Posted by spartanKid (Post 20269628)
FWIW in Olympic weightlifting women's bars are 25 mm in diameter, men's are 28mm, and standard powerlifting bars are 29 mm. So even though there are large ranges, the far ends of the spectrum are used for specialty purposes, like children or specifically working on grip strength.

3-4 mm of diameter difference is similar to the difference between using the thinnest Lizard Skins bar tape (1.8mm) and the thickest (3.2mm).

OK. Maybe that wasn't the best example. I guess I could say that FES makes a different frame for every rider in that photo as well. Could be same design but different dimensions or different frame altogether.

pierrej 04-07-18 06:10 AM

There's a lot of generations/models of the fes frames and it's not uncommon for the same riser to use a different one for each event

taras0000 04-07-18 11:30 PM

Found this on VeloNews today

Photo Essay: The inspiring athletes of paracycling track worlds | VeloNews.com

carleton 04-08-18 12:49 AM


Originally Posted by taras0000 (Post 20271333)

That's awesome. They are really fast, too.

I saw this gem, "Coach Sarah Hammer..." Whaaat? Nice.

pierrej 04-09-18 07:20 PM

Almost looked like you could put levers on them too....
Maybe some 33s for the track bike and 39s for the roadie?

700wheel 04-10-18 09:32 AM


Originally Posted by spartanKid (Post 20275088)
I would be worried that the carbon wouldn't be designed for the clamping forces of a lever and would crack. Carbon parts are not natively friendly to compression forces.

Are these bars carbon or aluminum?

carleton 04-10-18 09:38 AM


Originally Posted by 700wheel (Post 20275968)
Are these bars carbon or aluminum?

Based on the shape, I'd guess carbon....but that's a great question that Dixie should have answered on the product page, but didn't.

topflightpro 04-10-18 09:55 AM

Given the price and shape, I'd expect them to be carbon. It's hard to shape aluminum that much.

Had I not just gotten some Scattos for Christmas last year, I'd be all over these bars.

Baby Puke 04-10-18 05:17 PM

The Dixie bars are carbon.

carleton 04-12-18 01:38 AM

"Monique Sullivan sees beauty — and madness — in what athletes put themselves through"


I pushed myself in sport for 15 years, fueled by the desire to be the very best. After both the London and Rio Olympics, I walked away fully drained. It took me 18 months to recover from the build-up to London before I came back to training, and now, post Rio, I know that I have nothing more to give.
Monique Sullivan sees beauty ? and madness ? in what athletes put themselves through - CBC Sports

carleton 04-16-18 01:16 AM

I'm not sure what it's called, exactly. But it's the time of year when a few Western riders race NJS Keirin in Japan for a few months.

https://i.imgur.com/CJUj2fp.jpg

This pic makes it seem like an 80's teen movie, hahaha:

https://i.imgur.com/CFmwZAv.jpg

All are on IG and some post sorta frequently:

Thomas Babek (CZ): https://www.instagram.com/tomasbabek/
Theo Bos (NED): https://www.instagram.com/bostheo/
Matthew Glaetzer (AUS): https://www.instagram.com/matthewglaetzer/
Joe Truman (GBR): https://www.instagram.com/joetruman1/
Matthijs Büchli (NED): https://www.instagram.com/matthijs.buchli/
Sam Webster (NZ): https://www.instagram.com/sammywebster/

We've all seen NJS bikes before. But, it's cool to see a rider go from this:
https://i.imgur.com/mKoANRD.jpg

to this:
https://i.imgur.com/SHhOTfb.jpg
(Truman's bikes above)


Glaetzer's new whip:
https://i.imgur.com/77Ra5vb.jpg

I took my new steel beast for a spin today! I expected it to flex heaps and feel like a noodle but I'm stoked with how it turned out. I have my first practice race tomorrow so that will be the true test.
So...if these guys can't flex properly built steel frames, we can't :D

Baby Puke 04-16-18 01:42 AM

This is generally called "International Keirin" over here. They used to have special shorts for them but now it seems like they just wear the usual s-class shorts.

topflightpro 04-16-18 06:02 AM

There's a YouTube series on this from when Shane Perkins and Theo Bos did it a few years ago: https://www.youtube.com/watch?v=Qyem...ature=youtu.be

queerpunk 04-16-18 07:02 AM


Originally Posted by carleton (Post 20286799)
So...if these guys can't flex properly built steel frames, we can't :D

Ever see the video that Pervis made, where he put a gopro on his headtube facing his BB?

These guys can flex steel frames.


carleton 04-16-18 07:28 AM


Originally Posted by queerpunk (Post 20287024)
Ever see the video that Pervis made, where he put a gopro on his headtube facing his BB?

These guys can flex steel frames.

https://www.youtube.com/watch?v=v8kYzTKG8Ws

No doubt!

They can also flex carbon frames just as much (depending on how they are built).

I can only assume that the rider in this video doesn't make 2,300-2,500W like Pervis probably can:



This demonstrates the flex in the chainstays for a carbon fibre road bike (a Cannondale SuperSix EVO). This flex is completely normal but also surprising to realise how much movement there is in the carbon fibre.
As I'm sure you'd agree, the frame's build quality is the biggest factor in frame stiffness. More so than simply the material used.

TejanoTrackie 04-16-18 09:01 AM

I can’t produce over 1000W, and can still flex the BB on my old steel Paramount P14 track frame. My old steel road frames auto shift when I really stomp on them. Anyways, as I’m sure you know, other factors such as wheel flex play an important part as well.

taras0000 04-16-18 09:38 AM

These steel frames still flex quite a bit. More than their usual carbon steeds. A lot of that flex is where and how the frame will flex. Being able.to spread that same amount of flex over the whole of the frame leads to a bike that feels more predictable. It's when the tube choices concentrate that flex in a certain area that it starts to feel noodley, because it makes for a disconnected feel. Even back in the day the guys were flexing their steel frames quite a bit. Singleton' s bikes had almost parallel head and seat tune angles, but when you look at pics of him laying the power down, you can see how twisted his frames get.

carleton 04-16-18 02:58 PM

In talking to a frame builder in Portland, he taught me that the best way to make a frame stiff is with the downtube. The more contact the downtube has with the head tube and bottom bracket, the more stiff it will be with regards to deflection during standing starts.

So, picture a typical NJS frame, then:

- Use an integrated headtube that has a wider circumference.
- Use an oversized bottom bracket.

Even if you use thin-walled material (carbon or aluminum), you'll get a stiffer frame.

https://www.pedalroom.com/p/look-l96-14774_18.jpg

This is also what made Tiemeyer's very stiff:

https://www.pedalroom.com/f/95503c7e5e_2.jpg

It's difficult to find steel in shapes like that. But, you can buy aluminum pre-formed like that:
http://img2.everychina.com/img/c6/90...le_section.jpg
http://i01.i.aliimg.com/photo/v1/112...il_up_to_4.jpg
(this isn't the exact shape of Tiemeyer's tubes, just random images from google)

Tiemeyer's downtubes and seat tubes were shaped basically like the second image above, but without the sharp tip.

taras0000 04-16-18 07:17 PM

Guru used to make a track bike similar to the Tiemeyer, but their BB was machined out of a solid billet of aluminium, giving a HUGE welding interface. Required some interesting tube miters. Ill see if i can find a photo. I know I have them somewhere.

Morelock 04-17-18 04:11 AM

On the other hand, there was the old HOOKER elite (and also a track version I believe) which was way ahead of it's time aerodynamically, but holy crap was that bike a noodle. I rode a friend's (with 700/650 split wheels even!) a few years ago and I could feel it flexing, and that was just riding it in normal TT mode. Add the Aero or Die bars and so-so aero brakes to that and it made for an unnerving ride.

carleton 04-17-18 10:22 AM

Found these:

https://www.pedalroom.com/p/hooker-e...1-18674_40.jpg
https://www.pedalroom.com/bike/hooker-elite-cat-1-18674


https://www.pedalroom.com/p/90s-hook...ike-5567_6.jpg
https://www.pedalroom.com/bike/90s-h...rack-bike-5567

Follow the links for more pics.

I imagine that the bike above was probably supposed to be used with aerobars and a 650 front wheel like this:

http://wattagetraining.com/ttSetup/images/hSide.jpg
http://wattagetraining.com/ttSetup/hooker07/hooker1.jpg
http://wattagetraining.com/ttSetup/hooker07/hooker2.jpg
Show me your time trial bike - Weight Weenies

Morelock 04-17-18 11:23 AM

yeah... that thing is a BLADE in person, for it's time really impressive how far they went with the "narrow is aero" mindset. There's a great picture of Bostick on his at the TN State TT somewhere on the web.

Those "fully committed" bars :D
http://i44.tinypic.com/345bxvm.jpg

taras0000 04-17-18 12:27 PM

FOUND THEM!

http://i.imgur.com/TJPammz.jpg

http://i.imgur.com/kgF0BHm.jpg

Found another, but on a road going bike

http://i.imgur.com/aVoo6fH.jpg

carleton 04-17-18 04:00 PM

Those bars are nuts. How does one get started on them?

That BB is also nuts. Very cool.

We really need to start an archive of track bikes with as much detail as we can find. There is a lot of history, innovation, and engineering in the sport. I, for one, have hundreds of photos. Some are crazy cool.

Morelock 04-17-18 04:15 PM


Originally Posted by carleton (Post 20290542)
Those bars are nuts. How does one get started on them?

That BB is also nuts. Very cool.

We really need to start an archive of track bikes with as much detail as we can find. There is a lot of history, innovation, and engineering in the sport. I, for one, have hundreds of photos. Some are crazy cool.

When I tried it I started with my hands on the pads. Getting up to speed and into the tuck was a little sketchy. I assume the idea is that you just start (with a holder) already in aero. A few years later I used some Scott 100k bars on my tri bike, they flared out enough that you had a moderate representation of a base bar position (although still narrow) Definitely not going to be doing any out of saddle sprinting on either!

I asked the owner of the Hooker what he thought about riding it... he said that every time he started up on a U-turn on course he was positive he was going to die.

Aside - that BB is area is pretty slick. Never seen that

queerpunk 04-17-18 04:38 PM

That BB shell reminds me of what's on the Dolan TC1 - though it does look a lot thiccer on the Guru.

https://www.dolan-bikes.com/media/ca...w-logo-gmg.jpg

taras0000 04-18-18 01:40 PM

A little bit more on GURU. For anyone that isn't familiar with the brand, they were Canada's boutique bike builder. Everything from custom aluminum, custom carbon, custom Ti, as well as off the rack in your LBS. Sort of like rolling Tiemeyer, Serotta, SEVEN, Calfee, and Cannondale into one medium sized manufacturer.

https://www.slowtwitch.com/Opinion/The_Death_of_Guru_5574.html

m_sasso 04-19-18 03:23 AM

Some of the GURU past employees have started a new company called T-Lab, no track bikes posted however does not mean they are not going to make them.
Welcome to T-Lab

taras0000 04-19-18 10:55 AM

I saw that. It was interesting to see a lot of design cues that were taken from their old bikes, like that flattened top tube.


All times are GMT -6. The time now is 09:13 AM.


Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.