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Gearbox Bikes - Where'd they go?

no skid marks

Monkey
Jan 15, 2006
2,511
29
ACT Australia
I assume you're coming back at my comments?

Aaron singled it out. I was making a correction.

Accusing of exageration is an exageration? Puh-lease. Aaron has a history of overuse of hyperbole to hype his bike. Fair play, it's a great bike. But if you're gonna spout **** (like: It's unbreakable, no fatigue etc etc) expect to be called on it.

I was in no way slating the Rohloff. I was commenting that nothing is 100% efficient. Like I said, I'm a pedantic asshole.

Lahar rocks. There's so much potential there... I hope you guys have the skills and can extract it.
Fair enough then. like I said everything is a compromise to some extent and everything is breakable,the Lahar is just thee best group of compromises to provide the most fun,fastest,reliable bike I've come accross.
Noskcaj those forks sound interesting,I can't wait to see your frame and forks.
 

rosenamedpoop

Turbo Monkey
Feb 27, 2004
1,284
0
just Santa Cruz...
The frame is coming along pretty smoothly, unfortunately i'm at school right now, so that has slowed up the process.

I have found all the parts I need to make my 888/Stratos fork, and have been researching damping a bit, and I found a few good articles and patents on high-end motocross dampers which have an orifice low speed damping circuit and a shim stack high speed circuit. The machining required for the dampers doesn't appear to be difficult, so i might experiment with a one-side air spring, one-side damping w/ 888 crowns/stem/lowers and gold stratos stanchions w/ the teflon treatment fork.

I also might have a different shifting/damping control system in the works for my senior design project next semester if the chassis rides nice.

I hope to have the chassis done by the end of spring break (Mar 10) and ill try to get some pics and the geometry/weight info to post.
Hey pal, this thread is reserved for bad jokes, needless personal/cultural slights, and occasionally geeking out about gearboxes. There is simply no room for geeking out about forks here. Sorry.:plthumbsdown:
 

gemini2k

Turbo Monkey
Jul 31, 2005
3,526
117
San Francisco
Accusing of exageration is an exageration? Puh-lease. Aaron has a history of overuse of hyperbole to hype his bike. Fair play, it's a great bike. But if you're gonna spout **** (like: It's unbreakable, no fatigue etc etc) expect to be called on it.
um.....they appear to be unbreakable. From talking to people who have owned/ridden them when I was in NZ they seem to be basically......unbreakable and no fatigue.

One frame spending 7-8 years for on the NZ national series is more......unbreakable. Especially when people told me of crashes they saw various lahars getting in, and walking away fine.

Ex. A guy crashed into a tree, snapped the lowers on the 40, the top crown, bars, front deemax wheel. Xrayed the frame and it was fine. So ya.....they are unbreakable for all intensive purposes, I think one will be my graduation present to myself, if i can ever get my hands on it.
 

Whoops

Turbo Monkey
Jul 9, 2006
1,011
0
New Zealand
gemini2k, you've totally missed the point.

Certainly they are bloody strong (or over built, depending on how you view it), but they're not unbreakable... nothing is.

And just because something has no 'fatigue limit' doesn't mean that it won't fail due to fatigue.

If I had the $, and the need I'd be buying one - so once again I'm not baggin' the bike - just the fanbois.
 

no skid marks

Monkey
Jan 15, 2006
2,511
29
ACT Australia
Everything is breakable,otherwise yes it's over built and pointlessly heavier than need be. Lahar has a fairly damn good record though. I don't think it's strength is of concern. Lahar are happy to warrenty and I'd safely say Aaron would apreciate seeing failures so he can refine the Mk9 even more.
Sorry for always butting in here,it's just my bike is currently being made and I want Aaron to stay in the shed building it instead of on here talking.There's my vested interest.
 

3D.

Monkey
Feb 23, 2006
899
0
Chinafornia USA
I think time will be the healer on this topic. You will find yourself disappointed if you think internal transmissions are going to suddenly appear on the majority of our DH bikes.

Speaking for myself and others that are currently waiting out the ridiculous US patent approval process (18months-4years!)… it sucks. You have this little sparkling rare gem that you're just dying to show the world and you really can’t. Sure we can start coming out with it early and apply the “patent pending” label to it while keeping our fingers crossed, but unless you are truly refined and ready for battle, you will stand the chance of a company taking your basic idea and bypassing your rights to it with a strategic reconfig or altering which could leave your claims section (most important part of a patent application) null and void... you have to be careful in the patent realm.

I think we’re in for some big surprises real soon. I don’t mean by interbike 07 or anything, but over the next 5-10 years our drive trains will be much different in the way of gear selection for sure.

Keep in mind that we have been exposed to Honda’s revolutionary sprock-in-a-can design for a time period that renders it almost old and dying to some, but the fact of the matter is; they’re still waiting on they’re US patent too. They have the bank role and legal backing to reveal this device while still in pending status, most of us low key types do not.

Be patient, there’s some clever designs coming. We will all look at what we ride now as being archaic soon enough.
 

thaflyinfatman

Turbo Monkey
Jul 20, 2002
1,577
0
Victoria
Yes - there is. The gearbox has to be spun, = energy = efficiency loss.

me= the worst pedant you'll ever meet...

In the real world - it's as if there was 100% eff, but there isn't quite. Maybe something like 99.95%. Not enough to be noticable to ANY rider, but not 100%. I HATE marketing exageration.

meh - who cares. It's a damn good bike

hahaha, that's like saying your cranks are less than 100% efficient because they flex hysterically and some of your pedalling effort is lost in the material damping. Did you know that wheels are horrendously inefficient because the spokes, like, flex and stuff? :clue:

However, what I said stands: as a measurement of friction losses within the gearbox, it is effectively 100% efficient. There are no friction losses other than the hub bearings (same as a normal hub). Accelerating the mass of the hub/gears is not an inefficiency.
 

Honus

Monkey
Jun 6, 2006
177
0
Boulder, CO
I'm pretty sure I'm going to be less than 100% efficient today- there's no way I'm going to expend more calories at work than I'm taking in....
 

dw

Wiffle Ball ninja
Sep 10, 2001
2,943
0
MV
Keep in mind that we have been exposed to Honda’s revolutionary sprock-in-a-can design for a time period that renders it almost old and dying to some, but the fact of the matter is; they’re still waiting on they’re US patent too. They have the bank role and legal backing to reveal this device while still in pending status, most of us low key types do not.
The amount of IP that honda has pending on gearboxes right now is astounding. The sprocket in a can is only one of about 15 differerent designs they have applied for. Finding a way around some of their preliminary claims is going to be a real feat. They actually claim any gearbox with an intermediate counter-rotating shaft. That's amazingly broad, and the patent office will probably allow it...

good luck!
 

Pip3r

Turbo Monkey
Nov 20, 2001
1,112
0
Foxboro MA
As far as the nexus hub designs go, I have trouble understanding how those even can be applicable on a DH bike considering their gear spread. I worked for a commuter bike company over the summer that used them (3, 7, and 8 speed) and while their pretty cool they are absurdly heavy and just don't provide the gearing needed for a DH bike.

Considering the Nexus hubs retail for a few hundred bucks, I am extremely surprised no companies have tried to develop something with the same technology but lighter and with a more appropriate gear range for DH use that could sell for several hundred $. Considering people are willing to dump 1400$ on a fork I dont see why there couldn't be a market for a 1000$ drivetrain...
 

Pip3r

Turbo Monkey
Nov 20, 2001
1,112
0
Foxboro MA
:stupid: well, ppl already pay close to that for full xtr dont they?
well, that would be including cranks. An internal hub replaces the derailur, shifter, cogset, hub, chainguide. Unless you were to put the freewheel on the crankset instead of in the hub...
This would also be able to work on any frame and not limit suspension design, although you would be loosing the advantage of having less unsprung mass (mounting it in the frame). Of course, chaingrowth would be an issue but but there are ways around that.
You still get the benefit of shifting while coasting, a clean "single speed" setup, and no more derailurs busting.
I have left my nexus commuter hub sitting out in the rain and snow now for literally months and been riding it on salty roads and have never needed to service it, still shifts perfectly smooth.
 

xy9ine

Turbo Monkey
Mar 22, 2004
2,940
353
vancouver eastside
I have left my nexus commuter hub sitting out in the rain and snow now for literally months and been riding it on salty roads and have never needed to service it, still shifts perfectly smooth.
and this is the kind of reliability we should demand of dh bike drivetrains as well. the current derailleur based disposable transmission configuration is crap. definately the weakest link in dh bike design. the trannies in motorbikes can last the lifetime of the bike with nothing more than oil changes (and don't require constant tweaking to keep shifting perfectly), why shouldn't we expect the same level of dependability from bicycles at near similar price points? right now the rohloff hub offers that kind of long term reliability (i know a guy with 18000kms on one). i can only hope that the big guys (sram / shimano) are paying attention; i have no doubt they could produce a similar tranny at a lower pricepoint that would enable gearbox technology to trickle down from its current boutique niche. pushing disposable drivetrains is a great cash cow, though...

anyways, for better or for worse, i put my money where my mouth is. viva la revolutione!

 

xy9ine

Turbo Monkey
Mar 22, 2004
2,940
353
vancouver eastside
Beautiful. Very very nice.
(Final weight, Ride report?)
thanks. haven't had many rides due to crap weather, but its pretty much as advertised. super stable chassis, pedals really well, neutral under braking. really supple first few inches of travel with a nice midstroke ramp -ie, super duper plush, but not wallowy. really slack ha & long stays (compared to the pdc) is taking a bit to get used to; works better than expected in tight technical stuff though. my initial impression is that it sucks up / maintains momentum through the knarl better than anything i've ridden - there may be something to these high pivots. looking forward to doing some fast runs @ whistler. the rohloff is flawless. makes a bit of noise in the bottom gears, but seems to be getting quieter allready (apparently they require a bit of break-in time). as mentioned previously, gearbox attributed drag is pretty much imperceptable on the trail. neat being able to dump a handfull of gears quickly at any time. despite a preconcieved hate for twist shifters, i actually dont mind it in practice. i run a long enough grip that i'm not actually holding onto the twister. works great. drivetrain is really quiet (ie, lack of chainslap) as well - adds to the overall impression of 'solidity' when riding. so many unique, well thought out details & handsculpted bits on this bike - so much fun building this thing. current weight is ~39.5lbs.
 

Whoops

Turbo Monkey
Jul 9, 2006
1,011
0
New Zealand
thanks. haven't had many rides due to crap weather, but its pretty much as advertised. super stable chassis, pedals really well, neutral under braking. really supple first few inches of travel with a nice midstroke ramp -ie, super duper plush, but not wallowy. really slack ha & long stays (compared to the pdc) is taking a bit to get used to; works better than expected in tight technical stuff though. my initial impression is that it sucks up / maintains momentum through the knarl better than anything i've ridden - there may be something to these high pivots. looking forward to doing some fast runs @ whistler. the rohloff is flawless. makes a bit of noise in the bottom gears, but seems to be getting quieter allready (apparently they require a bit of break-in time). as mentioned previously, gearbox attributed drag is pretty much imperceptable on the trail. neat being able to dump a handfull of gears quickly at any time. despite a preconcieved hate for twist shifters, i actually dont mind it in practice. i run a long enough grip that i'm not actually holding onto the twister. works great. drivetrain is really quiet (ie, lack of chainslap) as well - adds to the overall impression of 'solidity' when riding. so many unique, well thought out details & handsculpted bits on this bike - so much fun building this thing. current weight is ~39.5lbs.
Groovy. Will you post up some impressions once you've hit Whistler?

re: details - can someone out there in internetland tell me why no one puts fork steerer stops on their frames (like Mountaincycle used to).. did MC patent it? I can't image that.
 

RhinofromWA

Brevity R Us
Aug 16, 2001
4,622
0
Lynnwood, WA
Groovy. Will you post up some impressions once you've hit Whistler?

re: details - can someone out there in internetland tell me why no one puts fork steerer stops on their frames (like Mountaincycle used to).. did MC patent it? I can't image that.
Only bikes I have seen that one are the MC and the Rotecs....

Do the new Rotecs have them?

Edit: yep they still have them....look just behind the fork on the DownTube. They also have a mounting point for the steering damper....no headset cup worries. Smart designing.
 

Pip3r

Turbo Monkey
Nov 20, 2001
1,112
0
Foxboro MA
i think welding crap onto a frame just for fork bumpers is a bit foolish. why not just use some adhesive rubber?
 

Whoops

Turbo Monkey
Jul 9, 2006
1,011
0
New Zealand
Nicolai offers it as an option on all frames.
Cool - so easy, so simple, so tidy. Sure for a WC racer it's un-needed weight, but for the rest of us mortals it's got to be a good thing.

Sorry for the thread jack.

So, about those gearboxes... what do you reckon owning the patent on derailluers would've been worth in the last 20 years? (not that anyone did) - Do you think that's what Honda's aiming for for the next 20 with gb's?
 

Punter

Chimp
May 8, 2006
54
0
39.5 pounds, ya see x-9ine thats why these fandangled gearbox bikes won't take off, they are just to damn heavy.

sheesh
tracks are getting less and less pedlier in general. The benefits of a 35pound pinger will become less significant in relation to hot suspension due to frame mounted transmissions in the future. Although agreed, lighter = better and faster.

I think all this thread has worked out, is that most people want a gearbox but no one can afford one.

I wonder how much money sram would loose in one year if 70% of non XC riders bought a gear box instead. ouch, they'd hurt bad.
 

dw

Wiffle Ball ninja
Sep 10, 2001
2,943
0
MV
I wonder how much money sram would loose in one year if 70% of non XC riders bought a gear box instead. ouch, they'd hurt bad.
They might notice, but it wouldn't come even close to giving them a sales defecit. The DH market is tiny compared to other MTB diciplines.
 

RD

Monkey
Jul 31, 2003
688
0
Boston, MA
They might notice, but it wouldn't come even close to giving them a sales defecit. The DH market is tiny compared to other MTB diciplines.
Definitely. Seems as though everyone in DH has some sort of hook-up anyway. I'm honestly amazed there is any money in DH to make product manufacturing economically viable. People must really do it for the love of it, no one is getting rich by any means.
 

OGRipper

back alley ripper
Feb 3, 2004
10,650
1,121
NORCAL is the hizzle
Definitely. Seems as though everyone in DH has some sort of hook-up anyway. I'm honestly amazed there is any money in DH to make product manufacturing economically viable. People must really do it for the love of it, no one is getting rich by any means.

I totally agree, and this is why the conspiracy theories earlier in this thread about the big guys blocking development of gear box bikes really cracked me up.
 

3D.

Monkey
Feb 23, 2006
899
0
Chinafornia USA
The amount of IP that honda has pending on gearboxes right now is astounding. The sprocket in a can is only one of about 15 differerent designs they have applied for. Finding a way around some of their preliminary claims is going to be a real feat. They actually claim any gearbox with an intermediate counter-rotating shaft. That's amazingly broad, and the patent office will probably allow it...

good luck!


It is pretty unreal how many variations they had for this current frame design. I was referring to there latest “can” design because it seems to be next for their approval status… there application is approx. 10-15 spots ahead of mine on the official list and I like to view their design drawings frequently.

I was hoping you could explain their counter-rotating shaft claim for me, I’m confused with the “intermediate” part of the claim. And, do you possibly know which claim number is related to this?

With the already approved existing patents for gearboxes, it seems as though it might be tough for them to receive approval for any kind of counter rotational claims… don’t you think?

I was a bit more fond of their “gear reduction” models, more drag but really neat.
 

3D.

Monkey
Feb 23, 2006
899
0
Chinafornia USA
I totally agree, and this is why the conspiracy theories earlier in this thread about the big guys blocking development of gear box bikes really cracked me up.
Yea, I don’t think anyone can afford to block any product that could possibly advance this sport and make it more user friendly…
 

WheelieMan

Monkey
Feb 6, 2003
937
0
kol-uh-RAD-oh
Cool - so easy, so simple, so tidy. Sure for a WC racer it's un-needed weight, but for the rest of us mortals it's got to be a good thing.
What exactly is wrong with rubber bumpers on fork stanchions?

I'm still waiting for an internally geared hub that is cheaper than the Rohloff, has fewer gears, weighs a bit less, and is compatible with a trigger shifter! I think thats where the real future is for bicycle transmissions. Having the transmission on the swingarm allows for more suspension design possibilities. I find the "mass centralization" and less unsprung weight arguments of gearbox bikes to be overhyped anyway... The real advantage here is reliability.
 

EVRAC

Monkey
Jun 21, 2004
757
19
Port Coquitlam, B.C., Canada
I'm still waiting for an internally geared hub that is cheaper than the Rohloff, has fewer gears, weighs a bit less, and is compatible with a trigger shifter! I think thats where the real future is for bicycle transmissions. Having the transmission on the swingarm allows for more suspension design possibilities. I find the "mass centralization" and less unsprung weight arguments of gearbox bikes to be overhyped anyway... The real advantage here is reliability.
Shimano Alfine comes close to your list, with reliability the big "?".
 

dw

Wiffle Ball ninja
Sep 10, 2001
2,943
0
MV
It is pretty unreal how many variations they had for this current frame design. I was referring to there latest “can” design because it seems to be next for their approval status… there application is approx. 10-15 spots ahead of mine on the official list and I like to view their design drawings frequently.

I was hoping you could explain their counter-rotating shaft claim for me, I’m confused with the “intermediate” part of the claim. And, do you possibly know which claim number is related to this?

With the already approved existing patents for gearboxes, it seems as though it might be tough for them to receive approval for any kind of counter rotational claims… don’t you think?

I was a bit more fond of their “gear reduction” models, more drag but really neat.
I'll have to look it up for you when I get some time. what's your e-mail address? Some of their gear reduction models are defintely pretty cool for sure, and all of the IP stems as continuations and CIPs from that first patent application. It's an impressive volume of work they have there. Enough to make me decide to concentrate my efforts elsewhere.
 

big-ted

Danced with A, attacked by C, fired by D.
Sep 27, 2005
1,400
47
Vancouver, BC
The amount of IP that honda has pending on gearboxes right now is astounding. The sprocket in a can is only one of about 15 differerent designs they have applied for. Finding a way around some of their preliminary claims is going to be a real feat. They actually claim any gearbox with an intermediate counter-rotating shaft. That's amazingly broad, and the patent office will probably allow it...

good luck!
I don't get this. Aren't Honda still claiming they have no plans to market the RN01? What's their reason for the patents then? Just to keep us all using old technology for another five years until the patent expires? Or are they trying to deceive us and in fact once all the patents are aproved, they'll magically wheel out an RN01 that we can rush out and buy?
 

dw

Wiffle Ball ninja
Sep 10, 2001
2,943
0
MV
I don't get this. Aren't Honda still claiming they have no plans to market the RN01? What's their reason for the patents then? Just to keep us all using old technology for another five years until the patent expires? Or are they trying to deceive us and in fact once all the patents are aproved, they'll magically wheel out an RN01 that we can rush out and buy?
Wish I knew, but I seriously doubt that Honda is looking at downhill mountian bikes as any kind of revenue increasing division. Maybe a marketing piece. Honda always introduces high and sells low. We'll see someday. If I was forced to bet I'd say they have their eye on commuter bikes more than anything else, but I find it tough to believe its all anything more than a pet project for Honda.