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Messages - G

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76
The Bike Shop / Re: Quick Questions
« on: August 07, 2015, 10:12:54 AM »
Dan's isn't carrying alum antigram axles? Anyone wanna trade for a steel one?

Are you insane?
:)
Why the hell wouldn't you check Empire first?!?!?!?!

http://www.empirebmx.com/odyssey-antigram-aluminum-axle

:)
G.

77
The Bike Shop / Re: What's the status on new Odyssey products?
« on: August 03, 2015, 07:10:45 PM »
where in the hell are those damned Dugan pedals??!!?

On my desk, my bikes and in boxes all over the place. Been having a few production issues to sort out with tooling etc but hopefully we are on the finishing straight now. Xmas is probably realistic but no promises.

:)
G.
 

78
The Bike Shop / Re: Odyssey Clutch Teardown?
« on: July 29, 2015, 05:43:52 AM »
Thanks for the vids, did well at explaining what was new and special about the hub.
Isnt there a risk of wear on the resistance mechanism? to me it looks like metal scraping against plastic.

And seeing how much trouble my c-clip gave me in the ratchet driver Im worried about the clip holding the hub together in this design...

This is a much bigger beefier clip and is essentially the same design that kept every Homer and Vandal rear hub together "back in the day". We NEVER had any issues with it coming out in those hubs, so it really shouldn't give any issues here.

:)
G.

79
The Bike Shop / Re: Chris Froome; Doping?
« on: July 29, 2015, 04:59:32 AM »
Nice to see some intelligent threads on BG over the last few weeks.

He also openly uses a sitting pedaling style and elliptical rings, both of which have the potential to really help.


Hey G, excuse my ignorance but what are elliptical rings? Oval chainrings? What advantages do these offer and if there is a significant difference why don't we use them in everyday cycling (or BMX for that matter)?

Just that. Rings where the teeth are arranged around an ellipse rather than a simple circle.

The reason we dont see them used that much (though the popularity is really growing now) is that Shimano had a crack at it in the 90's and made a total arse of it. They put the offset in the wrong orientation.

The idea is that you cant push in the top and bottom dead-spots so you want to get through those areas as quickly as possible and with less resistance. So at these points you have a diameter that is like a smaller ring, then in the places where you can really put the power down, you have a larger diameter.

I made myself an elliptical ring for my MTB about a year ago now and wouldn't go back now. For an MTB, especially when climbing, it is amazing, much easier to pedal up hard technical sections because you are much less likely to get stuck at the dead spot.   

I would happily run one on my BMX, chain tension is unaffected (if you get it right) and there is no reason your chain would be more likely to come off. Would be great for places where you have limited time to get your run up to speed, however on grinds it sticks down lower than normal so that isnt ideal.

Die-hard road bikers say that they "feel" strange and claim they are less smooth, but I think that this is actually more down to them being used to an unsmooth cadence from the round so when they try elliptical it being smoother feels weird. If you are actually putting any power down then an elliptical ring clearly offers better "matching" to the kinematics of your leg movement than a round one does.

:)
G.

80
The Lounge / Re: What have you made?
« on: July 29, 2015, 04:47:08 AM »
I converted a 2000 Ford Econoline (E150) into an adventure camper van....



Very nice. How long is the bed though?

:)
G.

Queen sized bed cut down 5" in length. Fits 2 people under 5'10" comfortably. Or 1 tall person diagonally.

Awesome. Looked about 5foot long to me in the photo and our vans aren't even that wide generally...

:)
G.

81
The Lounge / Re: What have you made?
« on: July 27, 2015, 05:47:20 PM »
I converted a 2000 Ford Econoline (E150) into an adventure camper van....



Very nice. How long is the bed though?

:)
G.

82
The Bike Shop / Re: Chris Froome; Doping?
« on: July 27, 2015, 10:58:13 AM »
I am very irritated by the way the press has looked at this and all the pseudo-science they have made up. Some guy tweeted how he woke up and the laws of physics had changed or some shit and that a guy making a lower power output beating another guy up a mountain was like a car doing 60 beating a car going 70.. utter bollocks.

Power and speed are NOT the same thing. That's why a 200HP sports car is quicker than a 800HP bus. Aerodynamics, weight and tactics are far more important.

My guess is that Froome (and all the other top riders) are doing what most people would call "doping" but I very much doubt that he is using anything that is clearly illegal under the terms of the rules. Team Sky are too clever for that, and over weeks of a tour I doubt it would help. He openly uses an inhaler. He also openly uses a sitting pedaling style and elliptical rings, both of which have the potential to really help. Movistar managed to get two guys to the podium, perhaps if their tactics had been better they could have traded second and third for first! Team Sky seemed to have traded absolutely all the rest of the teams energy for his result.

Spectators (and journalists) accusing Froome of doping when Contador (and others) are right there too is crazy. Contador was caught using and was barely sanctioned at all, nobody is saying a word about his very recent and very successful doping, while Froome gets all the shit simply because he is winning.

Getting good sleep, cool down, massage, stretching, nutrition, optimised bikes, and tactics are incredibly important.

IF Froome is doping, then you can be sure as hell that the next 5 guys behind him are doping just as much or more, so his win is unlikely to be because of it.

83
The Bike Shop / Re: Odyssey Clutch Teardown?
« on: July 27, 2015, 10:39:44 AM »
So the stick-tion of the resistance mech is unaffected by being greased? I assume then the resistance mech is designed to be run wet? Just lookin for the usual G details

Last one, do you have an aluminum or ti axle planned for down the road?

The resistance mech should be greased ideally, but it isnt critical, it will work just fine "dry", if there is any grease in the hub then there is nothing to stop it getting into the resistance mechanism so it will likely have some.

No aluminium axle for this and no plans for a Ti one, there wouldn't be much point as the axle really isnt a big part of the weight. A 14mm Ti bolt would probably be worthwhile as there is still plenty of strength and the weight saving is good.

:)
G.

84
The Bike Shop / Re: Odyssey Clutch Teardown?
« on: July 26, 2015, 09:32:18 AM »
...the only worry i'd have is about the plastic wearing over time or breaking some of thge finer plastic parts off...

There is very very little stress on any of the plastic parts. In terms of wear, the area that "resists/drags" is nearly 200mm^2 this compares with less than 1mm^2 on the steel balls of the current designs... There really is a lot of life in this part before it wears out, I would be very surprised if anyone ever wears one out even with decades of use.

I just watched all the videos and am a very happy person right now as George says some things that I've been saying for years.

I'm super glad he mentioned the part about the tolerance between the drive side shell bearing inside internal bearing race having a loose fit to the drivers outside bearing race and this causing problems.

I can't remember if I posted it on here or on Instagram, but G also corroborates the reason I gave why they want with a 3/8ths female axle on the drive side. 

This looks like a super durable hub and I will be getting one, if not more than that.  My only real question now is, Will it crankflip?

Glad to get your approval. Crankflipping is more likely to be successful than with current designs because of the "stick-tion" feature of the plastic.

Two questions. One, does the clutch require being all greased to hell, and if so will it be done at the factory or will it require teardown before use?

Two, is this actually the g-coaster, or do you still have another design on the back burner? Seems like I remember you mentioning lots of fiddly little internal parts and tolerances being hard to achieve for it on a full manufacture run

It will work fairly dry, but I would always recommend a good amount of grease. It should be pretty well greased from the factory but if it does need more you dont need to open it up, just use a grease gun to inject through the adjuster hole and it should work its way around.

G Coaster is radial engagement, this is axial engagement. G Coaster is meant to be the big shift, and the Clutch just a refinement of the threaded clutch mech we already use

Yes. This is a stepping stone to the G-Coaster. The G-Coaster has been dormant for a long time because we just couldn't get factories to take it seriously; they would make one prototype, mess up the hardnesses and then take forever to try to fix it. In the end, it seemed sensible to do the best job we could with the original design and hopefully get enough sales history to persuade factories to do all the extra work needed to tool up for the G-Coaster. This design does still have some minor flaws left, bearing life will be shorter than ideal (the angular contact bearing around the driver is still going to wear faster than is ideal, so it will probably need to be replaced every couple of years or maybe less if you want to keep the hub feeling perfect (but it wont explode without warning like the old driver bearings did)) and we have to make separate left and right hand versions etc. BUT it is a very useable hub that is leaps and bounds better than anything else on the market. In fact, it is so good, that I am a little worried that there wont be the need to develop the G-coaster at all...   

:)
G.

85
The Bike Shop / Re: Odyssey Clutch Teardown?
« on: July 23, 2015, 09:52:30 AM »
sheepdog and a few others here are involved with 3d printing stuff...

3d files for the plastic bits?

No.
Most 3D printers will only print PLA or ABS which just aren't suitable, most home machines also wont achieve a good enough tolerance or surface finish.

I always thought G had a deeper voice.


Actually liked the video got a better idea of the hub

More like something nerdy from the BBC. When does does it arrive in CANADA.

Not sure on Canada, probably about the same time as the USA.


G: amazing looking product. worthy upgrades to a traditional khe

questions:
What is the listed weight? What are the bolt sizes and tpi being used? thanks!

It annoys me when people refer to any axial design as a KHE clone. The axial clutch design goes back nearly a hundred years in coaster brake hubs. We (BMXers) were taking the brake shoes out of coaster hubs over 30 years ago. ACS were making the RL hub about 30 years ago too. Even the Odyssey Reloader pre-dates the KHE by a significant margin. The Poverty hub had the ball springs long before the KHE hub came out (though they were welded instead of screwed), and I think that that was just an off the shelf hub so I have no idea who came out with those. 
What did KHE bring to the party? They have a patent on their through axle gap adjustment (though Yu Hub claim this was their idea) and that is about it?

 
is the driver just running on the needle bearing? How is the load of the drive side bearing transfered to the axle? Can't really tell from the pictures

Yes. The driver only runs on a needle bearing inside and the usual angular contact bearing around the outside to the shell. The axial loads on the wheel are NOT transferred to the axle through the driver at all, this is how we can eliminate the 6802's and be certain that the driver bearings wont explode. There will be a separate video to explain the bearings...

:)
G.

86
The Bike Shop / Re: Odyssey Clutch Teardown?
« on: July 21, 2015, 09:14:40 AM »
https://instagram.com/p/5KaHH2NWO1/?taken-by=gsportgeorge

Should be up on odysseys page shortly

Cant believe there are people here who don't already follow me on Instagram!!!! :)

Resistance mechanism is a blend of plastics including PTFE and Kevlar. The beauty of using plastic for this is that we get high precision very easily, and also we get the benefits of "stick-tion" (ie. the dynamic coefficient of friction is lower than the static) so there is less resistance when pedaling but more before you start so the clutch can engage solidly.

I have done a load of videos using the cut-away hub etc. All on the Odyssey site now.
:)
G.

87
The Lounge / Re: What have you made?
« on: July 14, 2015, 06:06:22 AM »
Does anyone on here have like real access to 3D printer by a chance?

Yes. I do.

:)
G.

To get something made, is it really as simple as sending the maker a google sketchup and choosing the material?

I imagine not all 3D printers are capable of working with all materials but something like ABS Plastic or nylon is pretty standard isn't it?

I've also seen examples of 3D printers at the local Staples and all of it looks really rough and has burs. Is that something that I can sand out to make smoother or will it damage the integrity of the material?

I just want to make a little figurines.

It depends what machine they have and exactly what your model looks like. If you have someone willing to help you out, then they may be happy to accept a Sketchup file and convert it for you, but they wont be able to print directly from that. The file needs to be "sliced" into layers that the printer can then print.

Most home printers (like mine) are like a tiny glue-gun that lays down a bead of plastic in layers. Obviously those layers need something to print onto. For the first layer, you print onto the print bed, but from then on you are printing onto the model so you have a problem with overhangs and other unsupported layers. However, the software can add "support layers", little columns of material under unsupported areas to keep then where they should be, and you then snap these off. This actually works really well, but yes you will need to hand finish the surface if you want it smooth.

How smooth the part comes out will depend on the print resolution. If you want it super smooth then you can do very thin layers, but this then takes many many extra hours to print.

:)
G.

88
The Lounge / Re: What have you made?
« on: July 13, 2015, 06:19:19 AM »
Does anyone on here have like real access to 3D printer by a chance?

Yes. I do.

:)
G.

89
The Bike Shop / Re: Fly geo
« on: July 08, 2015, 02:07:53 PM »
Maybe I am being stupid, but did it say what the geometry is?!?!

Also, dropped chainstays are terrible. Makes the chain tensioner easy, but way too prone to grind damage IMHO...

:)
G.

90
The Bike Shop / Re: Which bike size for a 5 year old?
« on: July 08, 2015, 02:04:23 PM »
No way you can get one bike to last from 5 to 9, unless he's a really big 5 year old and you stop feeding him...

Getting a really good bike second hand is a good bet. They keep their value way better than adult bikes so you should be able to sell on for pretty much what you paid in a couple of years time when he outgrows it.

Weight is always a battle.

:)
G.

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