[Banga]

Biopace!

 

[manhattanprjkt83]

ummmm whats the point?

 

[chicodude]

ummmm whats so secret?

Please tell me you get the joke....



That's what he gets for thinkin' he's too good to run a bash ring.


ink:

 

[Kntr]

Look at the shape of the ring.

Any more info? Looks interesting.

 

[Transcend]

Please tell me you get the joke....



That's what he gets for thinkin' he's too good to run a bash ring.


ink:

If you look, you will see he does indeed have a taco on that guide. It would be damn hard to hit a chainring and do that much damage with one of those on there. You'd have to miss the taco, and still get the ring 1cm away...

 

[Kntr]

The chainring looks oblong or is it the just the pic?

 

[Banga]

Nah, all I know its from the Tignes Airwaves Four Cross in the french alps, in snow.

this lanky bloke had a new bike too.

 

[WheelieMan]

The chainring looks oblong or is it the just the pic?

Photoshop.

If the chainring really was oblong light that, then it would contact the chainguide roller.

One of my clunker bikes has biopace, crazy stuff.

 

[Banga]

The chain ring is the whole point, its not round, hence the biopace comment.

 

[Superdeft]

Bio-pace Strikes Back! DH is one of the few places where I could see this technology working.

 

[Transcend]

He must have been run into then, (4x) I could see that happening fairly easily in that case. Well, sortof.

 

[zmtber]

why would he care wouldn't he jsut get another one from his sponsors

 

[ThePriceSeliger]

Is Peat wearing the Royal Racing jersey still?

 

[Kntr]

Could someone explain Bio-pace a little better?

I thought it had something to do with.....

The chainring is oblong so you get a better stroke while pushing the pedal down.

 

[Transcend]

biopace info

http://www.sheldonbrown.com/biopace.html

 

[-dustin]

i heard that's a proto e13 guidering.

 

[Kntr]

biopace info

http://www.sheldonbrown.com/biopace.html

There you have it. Thanks

 

[wingman24]

Is Peat wearing the Royal Racing jersey still?

Petey will more than likely always wear royal kit because he owns a good bit of the company. Royal was just bought out by Valencia Sports Group (661) and so it will finaly be a worldwide type of thing instead of mosty U.K., we could all be sporting Royal colors soon.
Long live the king (i mean Peaty)

 

[zedro]

why would he care wouldn't he jsut get another one from his sponsors

uhh because he'd lose the race if he can't pedal

 

[ThePriceSeliger]

Petey will more than likely always wear royal kit because he owns a good bit of the company. Royal was just bought out by Valencia Sports Group (661) and so it will finaly be a worldwide type of thing instead of mosty U.K., we could all be sporting Royal colors soon.
Long live the king (i mean Peaty)

Won't that cause problems with Santa Cruz Syndicate? I also thought Peatey sold his part off? If Valencia bought it, I guess he want to keep a little so he can make some money now it is world wide. I wouldn't mind wearing Royal Colors.
Long live the king!

 

[zedro]

biopace info

http://www.sheldonbrown.com/biopace.html

actually this is not Biopace, if you read Sheldons description it is the opposite. Biopace has the small radius engaged at horizontal cranks, this ones the opposite.

 

[slobeone]

i can't tell if this is serious. the chainring is bent from an impact. there is a small bash gaurd on the bottom of the guide but it did not stop the damage caused by a rock or root.

 

[Transcend]

actually this is not Biopace, if you read Sheldons description it is the opposite. Biopace has the small radius engaged at horizontal cranks, this ones the opposite.

read next paragraph. It describes biopace.

 

[zedro]

read next paragraph. It describes biopace.

uhh, yeah isnt that what i said:"Biopace chainwheels have the small radius engaged when the cranks are horizontal, the large when they are vertical. " The pic shows the opposite.

 

[Kntr]

i can't tell if this is serious. the chainring is bent from an impact. there is a small bash gaurd on the bottom of the guide but it did not stop the damage caused by a rock or root.

The chainring in NOT bent. It is an oblong shape to maximize stroke. Read the article Transend posted the link for.

 

[Transcend]

uhh, yeah isnt that what i said:"Biopace chainwheels have the small radius engaged when the cranks are horizontal, the large when they are vertical. " The pic shows the opposite.

I understood you meant his description wasn't. And ya, it is the opposite of biopace, the patented "knee destroyer" chainring.

And also, it isn't bent. There is also no way it could work with that chainguide. It would either jam, or drop the chain depending on if you set it up for the high part, or low part.

 

[Kntr]

The pic of the chainring does make sense though. You would want a easier or smaller gear when the cranks are vertical and a harder or bigger gear when the cranks are horizontal.

 

[MOTODH]

biopace info

http://www.sheldonbrown.com/biopace.html

thanks for that I had no idea what was happening here, anyhoo isn't barel bb height around 12"?

 

[zedro]

The pic of the chainring does make sense though. You would want a easier or smaller gear when the cranks are vertical and a harder or bigger gear when the cranks are horizontal.

read the Sheldon article, that logic only works in a static analysis, dynamically you actually want the reverse.

 

[Transcend]

read the Sheldon article, that logic only works in a static analysis, dynamically you actually want the reverse.

Not to mention it will completely obliterate your knees in a hurry.

 

[Zutroy]

It looks like an Osymetric ring, they started to show up on the roadie guys bikes about 2 years ago, i had heard he had a couple DH guys looking testing them The idea is to optimizew the shape during the power portion of the pedlaing cycling.

 

[sleepinggiant]

^^^Thats what I was thinking too. Bobby Julich has been using them for quite some time.

 

[Zutroy]

^^^Thats what I was thinking too. Bobby Julich has been using them for quite some time.

Yeah he ran one at the olympics in 04 when he got the Bronze.

 

[Transcend]

Question is...how the hell does the guide work with it?

 

[zedro]

Question is...how the hell does the guide work with it?

why wouldnt it? it just has to be set with the larger diameter

 

[Transcend]

why wouldnt it? it just has to be set with the larger diameter

Right, and with an LG1 it has to go through the top idler thing. When the ring drops down it will no longer be in the idler and the chain can easily drop.

 

[Zutroy]

I haven't seen the LG1 in person, but it looks like the top idler is prpetty big, maybe the ring is aways in it, even with the shape change.

 

[Transcend]

I haven't seen the LG1 in person, but it looks like the top idler is prpetty big, maybe the ring is aways in it, even with the shape change.

I was trying to figure that out by looking at the image (pictureing a circle in my mind), it is hard to tell. It looks like it wouldn't be in there the whole time, but it may be touch and go. The angle of the photo isn't helping.

The top idler is pretty deep, probably about the same coverage as an front derrailleur would give.

 

[vitox]

think what you might i actually came up with the idea and posted about it here on RM around 2001, after i put an actual biopace chainring on a disco volante and figured with some adjustment, it could be set up in such a way that it countered the bobbing that occured when pedalling, actually this is fun because some people call pedal-induced-bob "biopacing"

it would be interesting to hear more about this concept.

 

[zedro]

Right, and with an LG1 it has to go through the top idler thing. When the ring drops down it will no longer be in the idler and the chain can easily drop.

well i never claimed it would work well

I'm not buying into that ring at all....