Oh. I saw the title and figured would were talking about taking a 10t cog and making it a chainring, for your short legs. :)

-C

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Any run that doesn't include pooping in someone's front yard is a win.

I've seen 10T jockey wheels for the rear derailleur, but not for a cassette.

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Some are born to move the world to live their fantasies...

https://triomultisport.com/
http://www.mjolnircycles.com/

I think ADA will have to be your only option. I thought Tiso would have one, but it does not exist.

Shimano makes one. In fact they make a 9t as well. I think TNT used to make one. Magic Motorcycle did as well. Did you try Cycle Dynamics?

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https://www.kickstarter.com/...bike-for-the-new-era

really!? for road? shimano?

can you give any part no.s?

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Where would you want to swim ?

I'll look it up when I get back to the office. It is in my "big book of Shimano" I recall it is from their Capreo grouppo or some such thing. I'm pretty sure it is a 9 speed cassette. I've discussed it before on this forum. It is for a group designed for travel bikes and trikes using 17" or 20" wheels.

When I get the part #, I'll post it but I assume someone will have come up with it after an extensive google search.

-SD

ah, for 7-speed.... but anything that would work with a modern cassette?

one would think that a 10-tooth would be a necessity for a strong rider on 650's...

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Where would you want to swim ?

A 7 speed cog can be used on a 10 speed system. Just need a flat surface and some 80 grit.

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https://www.kickstarter.com/...bike-for-the-new-era

ah, ok. but i assume the '80 grit' installation system is not yet fully shimano approved.

and they all use the same spline system?

and the same last cog/lockring threads?

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Where would you want to swim ?

The 9t has its own lockring. I've never seen the 10t as a stand alone cog, so I don't know if it uses a standard Shimano spline or its own. I know the last cog in the cassette is the 9t and its spline is unique because the diameter is smaller than a current freehub, I'm not certain about the 10t.



If you can get a hold of the 10t cog, I'm sure it can be made to fit.

Steve Hegg used to roll a 10t too, I don't recall its maker.

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https://www.kickstarter.com/...bike-for-the-new-era

I just have to ask why anyone would think that a 9 or 10-tooth cog is a good idea. I have seen several posts that gave info to the effect that the friction goes way up as you bend your chain around a smaller and smaller cog. That is the first part of why I don't understand.

Second, does anyone really need bigger than 53x11? That is a huge gear that somebody like Super Mario used to sprint in, but normal humans don't have much use for that many gear inches. Especially in triathlon where there is no drafting--at least in theory--and it makes no sense from a wind resistance/energy expenditure standpoint to pedal much beyond 30 mph, if not more like 27 or 28 mph. On the flats spinning 53/11 at even 80 rpm would be riding at up over 30 mph unless I am totally out of my mind. Unless somebody averages a TDF time trial-like 30+ mph, 53/11 is overkill.

I'm dying to be educated here.

Chad


Je ne comprends pas.

"Second, does anyone really need bigger than 53x11?"

Yes. I use my 55x11 during flat time trials at times, or downhill.

Yes. I use my 55x11 during flat time trials at times, or downhill.


What kind of speed are you pedaling to spin 55/11? I spin out my 54/12 at like 36 mph, but only because it is fun in training. During a race it would be a total waste of energy.

I can buy into a bigger gear for stand-alone time trials that are fairly short and every second counts, but not in triathlon. Frankly, if they made more cogsets starting with 13 I would ditch the 12 as well.

Chad

650 c wheels.

also (my case) 700 c wheels in steep downhills, slight downhills, tailwinds, no wind, and all kinds of multiple variations of the above IN a triathlon (olympic dist., not IM). and that's 53 x 11, not 55 x 11.

55 x 11 is for lance and rolexman.

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Where would you want to swim ?

That kinda depends on how fast they are pedalling.



Styrrell

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Styrrell

because I like to push big gears and my cadence is not 80rpm when racing but much lower...around 60-65.

Motoring down-wind would wind you up over 30 easily. I've done several bike races where the pack was cruising at close to 38 on a downwind flat section. That gets a little exciting...

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Some are born to move the world to live their fantasies...

https://triomultisport.com/
http://www.mjolnircycles.com/

can I do this test behind a truck?

"motoring at 38 in a pack is a lot different then most guys doing tris or tts"

Yeah, no shit? I didn't realize that... My point was that there are more than tri race situations where the cog might come in handy. We don't ALL ride solo no drafting all the time.

"heres a test for you see how long you, by yourself on a flat road no wind can ride at 38mph"

Well I didn't think the criteria was "what percentage of the time will I use this cog" so much as "is there a situation where I might want this cog."

Whatever.

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Some are born to move the world to live their fantasies...

https://triomultisport.com/
http://www.mjolnircycles.com/

Does anyone know if ADA 10 tooth actually fits on a Shimano hub? In reading their site it almost sounds like it works only with their freehub body?

This would be great for me if Shimano sold a 10sp 10-20 or 10-21. I like to ride a 53/42, so at my 95rpm spin I can have a range of 15-31mph in the 42 and 19-39mph in the 53. This would hit all the speeds I am likely to see on flatlands without having to change rings. I find myself occasionally wanting at 10 where I am riding a momentary downhill and am already at 110rpm in a 42/11. With a 10 I'd never need to use the big ring as I could hit 40mph in the small ring. 90% of the time I am riding a 42/16 or 42/15 at 95-100rpm.

At 60rpm that is 9-20mph and 12-26mph. The difference between a 55/10 and a 55/11 is 23.5mph vs 25.8mph. 65rpm would get you 28mph with the 10 and 25.4mph with the 11, so I guess if your target is to stay under 70rpm and go fast then a huge ring and tiny sprocket is the way to go.

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