[Closed] Elliptical single speed chainrings

takisawa- couple of 33's and 35's left. The next batch on the cnc will be in a few weeks apparently.

I like the sound of Tazzies special ring

DD- if you ask nicely, i'll let you try it out 😀

Things have gone all wonky, cheers Taz
[url= http://farm6.staticflickr.com/5321/7070287921_9d0fe09db5_b.jp g" target="_blank">http://farm6.staticflickr.com/5321/7070287921_9d0fe09db5_b.jp g"/> [/img][/url]
[url= http://www.flickr.com/photos/rocketdog/7070287921/ ]Wonky[/url] by [url= http://www.flickr.com/people/rocketdog/ ]rOcKeTdOgUk[/url], on Flickr

Here's a question, if the chainring feels 2 teath easier (i.e. a 34 feels like a 32), do you either;

a) drop your cadence to suit
b) pedal at the same cadence but go faster
c) neither of the above, you pedal at the same cadence, with the same HR, and shift up a gear at the back, it just feels easier on steep climbs as there's less of a deadspot?

A bit of B and some of C imo.

There's no free energy available, but you do use the effort / cadence more effectively. I was on a 32/19, now a 34 oval/19 and seem to climb as 'easily' on middling / low cadence climbs ie no real difference in perceived effort, maybe more ability to avoid stalling on steep stuff considering it is a slightly higher gear; I can accelerate faster, I really notice it most out of corners or a quick spin to start a descent; spinning along the flat at a set cadence is obviously a tad faster at the same effort level ie not much. It's like an automatic very-close-ratio 2-speed imo, if that makes any sense..

Humm, I was considering one of these but can't quite decide on my gearing to match.

Im considering one of these for my cycle speedway bike, for snap out of the corners and off the start....

I'm not thinking of one of these, but I like reading about them.

I presume there's test evidence using power meters, hrm data etc to establish these do work?

😉

first thing I'm gonna do when I get one is try it out with a powertap 🙂

I'd be interested to see the results.

I can't see how getting your foot through the dead spot faster has any advantage other than psychological.

I'd figure that it's more like the difference between riding your normal gearing and a monster gear (let's say 5 times higher than normal). In the monster gear, you'd theoretically use the same energy/power but since you can't actually push it round with five times the force, even if you can reduce your cadence to match, you actually go slower.

i'd like to know more, any linkys?

can't see how getting your foot through the dead spot faster has any advantage other than psychological.

It may well be just that. According to Rotor (who would be positive about it, but it makes sense from my exp of using the 34 oval and 32 rounds on and off), it's that speed through the dead spot plus the resulting 'leg momentum' toward the mid/end of the downstroke that counts. So you get a good 'run up' at the power stroke around 4 to 5 oclock position, when the ring is at its largest radius - ie you can turn a slightly larger equivalent for the 1/6th or so of the revolution where it counts, and rest-easy elsewhere. The 1:6 effort:rest ratio per leg of pedalling a bike has been looked into and shown to be pretty effective, although I forget where I read that now.

I guess you'd need to look at av speed on steady climb vs HR to say for sure, I just tried them and liked them )

[url= http://www.rotorbikeusa.com/images/science/pdf/qring_test_summary.pdf ]science testing bit for elliptical rings just for AL[/url]

Where's the executive summary and will it make women fall at my feet?

I picked a 35t up at the weekend from kev to go on my 1 x 9 carbon 456, just waiting for the bloomin frame to arrive...

Out of you guys who've now got them, how many of you have tried them??

Thoughts in use??

Lovin mine. Set up ss 35tx20, hoping to try it out in 1x9 mode also before hopefully buying another one. Does seem to smooth/even out the pedal effort and cadence on the ups and downs.

I've been using them for a while,quite like it.of course I'll never be a riding god like Taz(so he tells me) but it feels beterer to me,so I'm a happy bunny.

noticed Brad Wiggins was using wonky chainrings today... in the Tour de Normandy

😆

Any news on direct mount Middelburn rings? I need a new Uno and fancy giving a wonky ring a go.

Cheers, Rich

"Leg momentum"...I find if I don't push my legs round really hard, the bike stops...

Interesting test tho...3% gains...why aren't all the pros using them I wonder.

Christoph Sauser
Ned overend
the niner ergon team
cervelo team
etc..
nope no pros there using elliptical rings 😀

Oh and if anyone wants a go on one I'll be racing on an elliptical ring (single speed) at E6 next week some come and have a play on it after the event

2 individuals and 2 teams and "etc"...

...so are they winning everything?

no Al 'cos it's snake oil obviously 🙄

*gives up with "big hitter" and goes back to having fun*

What's 'big hitter'?

If those pros did win everything they wouldn't say it was down to the rings. That'd be daft )

oh dear, wonky rings didn't do Wiggo any favours today...

Yes, saw that too. Although it may have been that he changed from a really big ring to a really small one ?

Wiggo doesn't have a beard though

I'm just trying to see what evidence there is tazzy, you'd think there'd be more than that (biased, imo) one test if there really was a 3% benefit.

anybody using the elliptical\q-ring on a singlespeed and flat pedals? would they work?

no, the flat pedals would cancel the elliptical concentricity and sinusoidal frequency resonance of the system as a whole making a small tear in 3d space leading to annihilation of earth and most of the big hitters.

(of course it'll work 😉 )

I meant work as in equally effective but I caught your drift 😉

Since we are at it, I currently run a 34x18, should I get the 34 or the 33t elliptical ring?

Kev (and another lad) said that you can go 2 teeth up on what you normally would run, due to the "benefit".
I was going to run a 34, which I thought would be pushing it originally, but I bought and use a 35t.
This is on a 1 x 9 btw, 11 - 34 cassette and it's going pretty good on all bar really long climbs.

[url= http://farm9.staticflickr.com/8009/7242345464_b8e3da221f_z.jp g" target="_blank">http://farm9.staticflickr.com/8009/7242345464_b8e3da221f_z.jp g"/> [/img][/url]
[url= http://www.flickr.com/photos/47638700@N06/7242345464/ ]Untitled[/url] by [url= http://www.flickr.com/people/47638700@N06/ ]jerrypc69[/url], on Flickr

.
Also in ...Uno flavour .......

As old as the hills. Shimano biopace from around 1990.
Waste of time IMO.

tomstickland - Member
As old as the hills. Shimano biopace from around 1990.
Waste of time IMO.

[img] ?w=360&h=450[/img]

Tom, after extensive research it's been found the Biopace was flawed and wrong - Shimano got it wrong. These rings are way way different and do actually work and there's been nothing but praise for them. There's been loads of work done on the actual ellipse too and the paperwork to prove it is quite exhaustive.

Good
I used bio-pace first time around and loved it .

*shrugs* ......I still liked Bio-pace

Is the black coating on these rings normal anodising, or something harder that will help prevent the rings wearing as quickly?

is this the STW version of Mornington Crescent or genuine? If the latter, should I assume a tensioner is required?

Why would a tensioner be needed ?

no, no tensioner is needed, you just need to know how to set up the chainring correctly with the correct tension at the right point of the "wobble" and low and behold you can mosh the tits off it without it dropping. there are various instructions and guides floating around for set up.

(there is a little bit of variance in the tension but it all works fine in practice) the only time I had an issue was using an elliptical with a cheapo cog on the back with small flexy teeth. Chucked a surly on the back on been fine for 2 years of hard smashin on my race ss.

[img] ?psid=1[/img]

a wibbly ring and no fugly tensioner in sight 😀

A bit off topic but Tazzy what size rear tyre have you on your Selma ...as I have an Ardent 2.25 and have only got about 2mm clearance ....ok when dusty but the UK don't do dusty much

2.25 rocket ron, even made it though E6 this year which was a bit, erm.....claggy

for full on winter use a beaver, but to be fair the jones comes out to play in the sloppy goppy stuff to keep selma pretty and cannock out of my Fox's

Thanks for the info tazzymtb.

Why would a tensioner be needed ?

Has anyone tried elliptical sprockets?

Has anyone tried elliptical sprockets?

no but I do have one leg shorter than the other after some serious tests and a power sander, I found it was more effective for super cadence.

I do now run around in circles though 😀

I tried elliptical sprockets

they were shit
they were great
they were shit
they were great
...

In the end I decided it was all just hyperbole

geek humour! brilliant 😉

😀

I'm gonna saw the right hand side of my bars shorter as my riding loops are usually clockwise

*touches forelock* 😳

If my right leg is stronger could I develop a more even cadence by using one crank at 170 and the other at 175 which would equalise the leverage ?

If my right leg is stronger could I develop a more even cadence by using one crank at 170 and the other at 175 which would equalise the leverage ?

no what you need to do, is only eat using the left side of your mouth, which will starve the right hand leg of nutrients and balance things out without resorting to such silly things as odd crank lengths.

Singlecrack,
Is that a one off, or are there others floating about?
Be interesting to try on the Pugsley.....

Thanks for the info dodget.

Do the rings come in 3/32 btw?

PS nice UNO ring, wonder if they will make a version for the sram x9/x0

Flashes .....no not a one off they supply UNO rings as well now ...give Dan a ring at BETD goldtech

*says in a giddy and excited squeal*

they are making Ti wibbly rings. YEY!!! will hopefully get my paws on some soon!

*wanders off to sell a kidney on ebay*

the UNO rings only work with an EBB or a longer BB spindle though as they foul the chainstay on most frames as at the moment they don't have the offset of a middleburn Uno.

Ti oval rings.. oh-yeah )

Go on then...how much ?

ti wibbly!!

let us know when you have some 😀

got an email from Kev tonight saying that the next batch are due for production and he's thinking of ltd ti run as well. I'll have a chat tomorrow to get prices and stuff. Email me if you're interested and I'll let you know the score.

*is now looking at ti spaceframe jones to go with his ring*

Whats you email tazzy?

shhhh it's a secret

Thanks.

I am interested as well, as long as the rings are 3\32 compatible. Email in profile. 😀

I'd be interested in a 34 t if they become available.
The recent mud ate my renthal so replacement would be handy soon.

finally fitted mine yesterday and went for a mince around
[url= http://farm9.staticflickr.com/8028/7304175294_4e8d9d2700.jp g" target="_blank">http://farm9.staticflickr.com/8028/7304175294_4e8d9d2700.jp g"/> [/img][/url]
[url= http://www.flickr.com/photos/rocketdog/7304175294/ ]the it's all gone One Key ride[/url] by [url= http://www.flickr.com/people/rocketdog/ ]rOcKeTdOgUk[/url], on Flickr
thoughts on it here http://a-pic-a-ride.blogspot.co.uk/2012/05/it-all-gone-one-key-ride.html

What? Not even a comment about the state of my garden?

What? Not even a comment about the ride with the wobbly ring?

Too niche i expect

RD, cranks need cutting/polishing,and the less said about your 'garden' the beterer.........

Erm bit late to this, but are there anymore available?

holy-thread-resurrection under a different title

http://singletrackworld.com/forum/topic/anyone-running-a-q-ring-on-ss