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More Honda gearbox news

Old 01-02-05, 05:07 PM
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Its worth watching this to see how the gearbox works. Its a movie showing everything in real time and how it works.

http://www.honda.co.jp/HDTV/MTB/rn01-gearbox/

Its a streaming vid and is a little long but worth it if you are a gearhead.
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Old 01-02-05, 06:19 PM
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Looks like a derailler in a box
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Old 01-02-05, 06:23 PM
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Old 01-02-05, 07:15 PM
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Do these guys ever compete? And are they really good?
And roughly how much does this bike cost again?

And that track looks really fun.
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Old 01-02-05, 10:30 PM
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no they dont. and the bike is currently not for sale.
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Old 01-02-05, 10:41 PM
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Actually they do compete. And their Pro last year's World Champ Greg Minaar won the Norba Series and place 2nd in the World Cups. Not too bad for a prototype bike and a first year team. Greg's team mate (Can't remember his name) did well for a Japanese rider as well.

Estimated cost of the RN-01 is about $75,000.00 if it "were" for sale.
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Old 01-02-05, 10:52 PM
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Thats the prototype. I actually think this frame is going to be available, and much cheaper. The 75,000$ price tag was for the CVT drive train which they later dropped for this modified internal derailer system.

Another bike for your collection a2
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Old 01-02-05, 11:08 PM
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Almost bought another one a couple days ago.

My son wants to start BMX, and I almost bought a 24" BMX cruiser so I could ride with him.
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Old 01-03-05, 02:52 AM
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honda's new 5 maybe 6 speed "Derailleur-in-a-box" !
i do like how its protected from getting damaged, but a pain in the @$$ to repair or maintain.
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Old 01-03-05, 07:36 AM
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is it just me, or is the video in japenese?
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Old 01-03-05, 07:57 AM
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Originally Posted by Phatman
is it just me, or is the video in japenese?
You and my Daughter.... "Daddy, why is the computer talking funny?"

Any thoughts on longevity there, due to the shorter distance from chain ring to cassette, the chainline is gonna be drastic dont you think?
 
Old 01-03-05, 08:17 AM
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Originally Posted by Phatman
is it just me, or is the video in japenese?

それではHondaダウンヒルバイク「RN01」のミッションについて説明しよう。ケース内部には、ドライブスプロケット、ディレイラーシステム、ドリブンスプロケットの3つが、コンパクトに収められている。この ミッションの特徴は、後輪が回転していれば、ペダルの回転を止めていても常に変速が可能であること。
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Old 01-03-05, 12:20 PM
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My LBS dosn't reckon that the gear box will be around long...
...a new drive system has been developed with just one cog, but which 'changes sizes' so the rider can choose any ratio between the two outside ratios. It's been made, now all that needs to happen is for the price to be brought down, WAY down.
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Old 01-03-05, 12:30 PM
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Thats the CVT system honda (sounds similar) developed for the original RN01. And they dumped it for this system.

The next system, if it ever trickles down, will be a gearbox of some kind or better internally geared hubs.
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Old 01-03-05, 12:46 PM
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OT question for anyone familiar with Japanese...

How come every time I see Japanese writing, there's always some English mixed in with it? I notice this on Japanese packaging, Japanese signs, Japanese websites, etc. etc. etc.

However, you NEVER see Japanese mixed in with English.

Are there just some characters/phrases/words that can't be translated into the Japanese alphabet?
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Old 01-03-05, 12:50 PM
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The word likely doesn't exist in japanese. Same reason why some people, when speaking mandarin, will use both languages. My buddy back home had to do this because his father couldn't understand what he was saying if he tried to come up with a chinese word to match what he was explaining.
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Old 01-03-05, 01:11 PM
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Another OT story since you mentioned Chinese...

I used to volunteer to teach Junior Achievement in Oakland at a Chinese elementary school. Often I'd use a word the kids didn't understand but the teacher would repeat it in Chinese and the kids would then know what I was talking about.

We were discussing all the things your community does to help you...things like cleaning the streets, providing fire departments, police, education, etc. I then started asking them how this was all paid for. The kids had some guesses but didn't get it right so I asked if any of them had ever heard of "taxes"

One student's eyes lit up and he said "Yes! I know that!" I said "Great, tell the class about taxes?"

Surprised, I watched the kid get up and approach the large US map on the wall. He reached up and pointed at the southwest: "Right there. Texas is just north of Mexico!"

I maintained my composure but the teacher lost it
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Old 01-03-05, 01:31 PM
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Hahahahahahha. Nice storey and a smart kid. Thats freaking hillarious
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Old 01-03-05, 02:47 PM
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time to pay the texas. i hope i get a tex return
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Old 01-03-05, 04:57 PM
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AHHAHAHHAHA, lol, texas pays the taxes. Lawlz
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Old 01-04-05, 02:27 AM
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back to the gearbox,

the CVT unit is still under development and was never raced. it was only a demonstrator.
This Boxed Gearbox is the interim unit till the CVT thing is up and running reliably
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Old 01-04-05, 03:24 AM
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interesting for sure.
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Old 01-04-05, 01:47 PM
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ok, really I'm not being a troll... I just want someone to explain it to me......

Ugh. I can only sit and wonder why.
The only thing I can figure is that the enclosure keeps it cleaner and protects it, and maybe eliminates the need for a chain tensioner.

It looks like it weighs a few pounds, so theres basicaly no application outside of DH.

Its the exact same setup as a standard crankset/cogset/deraileur setup you see on most bikes, so the same points of failure exist. Unfortunately, since its enclosed, its not all that field servicable....

Other than a proof-of concept that we can hide components in a faux-gearbox and make bikes look more like motorcycles, exactly what use does it have?
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Old 01-04-05, 01:53 PM
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Its for a dh bike. Its main purposes are multipl

1 - gearing keeps drivetrain chainline straight, uses less chain making pedal effeciency very clean, this also reduces a tremendous amount of the wear and tear you get from the traditional drive train. The drive train chain itself is also short.
2 - drive train protected on a dh bike...if you don't know why this is important you obviously don't dh. Talk to anyone who dhills or freerides a lot and most of us hate deraileurs and deraileur hangers
3 - drive train that stays working in all conditions with little maintenance
4 - also if you watched the vid. Looked pretty basic o me. 3 hex bolts, pull off casing and fix chain/gears. Didn't seem to far beyond a deraileur to me.

Sorry if it doesn't fit in the xc world but dh and fr are closer to mx than to xc (thank god) and the parts are finally starting to reflect that. Wider hubs with big through axles, oversized bearings (should be oversized cup really). Next step is get rid of this crappy deraileur system with parts hanging off everywhere that can break. Then we will have finally gotten rid of the last bad part that we, unfortunately, adopted from road bikes.

Still isn't perfect, doubt it ever will be, the cvt system will be perfect but for 100,000$ for a bike, thats just nutty haha
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Old 01-04-05, 01:55 PM
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the CVT unit is still under development and was never raced. it was only a demonstrator.
This Boxed Gearbox is the interim unit till the CVT thing is up and running reliably
I am pretty sure minaar raced the cvt for a few races, but was dumped because of reliability. I remember some guys who worked beside the Honda tent and saw the cvt box and it wasn't anything like the current box being run.

I have heard to opposite but really don't care. CVT is a pretty sweet concept. I do know this bike is going public according to many sites, without the cvt. Obviously CVT will always be too expensive for the average person.

Oh and as a side note. It is actually a very lite system. (this is for stumpy) The bike itself is amongst the lightest on the dh circuit.
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