Recent Posts

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21
General Discussion / Re: That go-to meal
« Last post by John Nelson on November 22, 2014, 09:07:27 pm »
My go-to meal is one Subway foot-long sandwich. Ingredients: one Subway foot-long sandwich.
22
Routes / Re: Southern Tier, highway 78 Glamis to Palo Verde, Ca
« Last post by Westinghouse on November 22, 2014, 05:03:43 pm »
I reported what happened. Anyone's credulousness as to the facts is irrelevant. I was alone. The chances of those many events being mere unplanned happenstance are absolute zero. Believe whatever you need to believe. You were not there, or were you. I reported it to the FBI. What do you know about extremist groups, about me, about anything? Another cyclist noticed something similar to this. I believe it was on this forum. You said they didthat to me and me alone? How would you know that?
23
Gear Talk / Re: Seeking Feedback on new gear system
« Last post by vectrgear on November 22, 2014, 03:02:13 pm »
I saw the report on your product on Bike Rumors today so it seems you are really not a troll. 

I am honored.

I agree that the rotational feel is going to be very lumpy and, indeed, the video clip shows the pedaling action to be almost a ratchet.  I also wonder about keeping the chain on the "chainwheel" teeth since it is unsupported so many places in the rotation.   I think a lot of real world testing will have to be done to show the concept is viable or to conclude it was just another of the many "new and improved" bicycle transmission ideas that didn't work.
Reallize, this is a working model so it is not as smooth and polished as a prototype. Some of the unevenness of the video is due to video quality -- which I will work on improving.

Initial real-world testing shows lumpiness is less than people expect for reasons I describe in the reply to Lucas.

I actually expected most of the resistance to be from those who know other expanding chainring devices have not succeeded.  I think the advantages of mine over predecessors is its simplicity, which leads to it being lightweight and inexpensive to produce, and that I have designed it to be interchangable with (or as easily installed as) other components.
24
Gear Talk / Re: Seeking Feedback on new gear system
« Last post by vectrgear on November 22, 2014, 02:55:26 pm »
I am sorry yo say, but your product will not have commercial success for 2 main reasons:

1. The wear on the driveline will be 10x bigger than normal due to only 4 sliding members.
2. Due to the 4 sliding members, there will be a large torque variation 4 times for each revolution which will be annoying to the user. Remember, gearing is not determined by the radial distance of the 4 teeth sets, but by the radial, instant distance of the chain in the vertical top position. This position bounces up and down 4 times for each revolution.

However, I do find the automatic changing system interesting.

Lucas
Lucas

Thank you for your feedback, but I respectfully disagree about the potential of its commercial success.

The main advantage of the VECTr system is to prevent chain drops by keeping the chainline constant, while also allowing more gearing choices that 3 chainrings.  It will do this at the same or less weight as traditional 3 chainring setups, and much less cost than internally geared hubs (or planetary systems).

Reduced chain wear is not VECTr’s main advantage, but I think it will actually reduce chain wear. It is true that only the five teeth on each gear segment engage the chain, and this will increase wear on those links because of heavier load.  But you should note that at the same time there are six or eight links suffering no wear. The extra-wear on some links will pass around the chain, so overall there is not increased wear, or it is minimal.

Overall, there will be less chain wear than there would be on a three chainring set up. Think of it this way: VECTr only has 20 teeth which engage the chain, so chain wear will be the same as always running on a 20t ring.  The rider, however, will have the advantage of 24 to 44 tooth equavalent gears, but without the added chain wear.
 
There will be variations when VECTr is in the expanded position. Some have seen a similarity to oblong or irregular chainrings, and both as and advantage and a disadvantage. It does seem, though, that the square-ness of the chain path when VECTr is in expanded position (lumpiness) will not be as noticeable since larger gears are used on downhill or level roads when the pedal momentum is at play, and crank loads are not heavy.

In more contracted settings, the squareness would be less pronounces, and in the smallest position, non-existent.

I hope you still are interested, but you should know it is not an automatic system.  Gear changes are under the riders control and not an automatic response to torque or whatever.

Joe
25
Gear Talk / Re: Seeking Feedback on new gear system
« Last post by Old Guy New Hobby on November 22, 2014, 10:30:08 am »
There's a lot of potential with this kind of a idea, but this implementation has just 2 teeth engaged at any one time. Instead of spreading the force across 10 or more teeth, the force is focused, which might be tough on the chain and the teeth. It will be interesting to follow the product as it begins to get real-world testing.

I wasn't overly concerned about visiting the web site. My computer patches and updates are all in place. Just visiting a site is not generally a problem. However, once on a site, I am cautions about what I click after that. You might consider putting more information on the home page, to help visitors decide whether they are interested in looking at this in more detail.
26
Gear Talk / Re: Looking for a good touring shoe.
« Last post by pptouring on November 22, 2014, 09:24:41 am »
This year, we cycled from Germany down to the very bottom of Greece, then all the way up to Nordkapp, Norway before cycling back to Germany wearing hiking boots! Sent our boots home and are now wearing worn out tennis shoes as we cycle around SE Asia.  :o
27
Gear Talk / Re: Seeking Feedback on new gear system
« Last post by DaveB on November 22, 2014, 09:21:54 am »
I saw the report on your product on Bike Rumors today so it seems you are really not a troll.  I agree that the rotational feel is going to be very lumpy and, indeed, the video clip shows the pedaling action to be almost a ratchet.  I also wonder about keeping the chain on the "chainwheel" teeth since it is unsupported so many places in the rotation.   I think a lot of real world testing will have to be done to show the concept is viable or to conclude it was just another of the many "new and improved" bicycle transmission ideas that didn't work.
28
General Discussion / Re: Schwalbe Mondial vs Marathon Plus Tour
« Last post by pptouring on November 22, 2014, 09:05:52 am »
We just replaced our Mondials before leaving Europe for Southeast Asia.

18 months and nearly 10,000 miles on all types of terrain and only two flats.



29
Gear Talk / Re: Seeking Feedback on new gear system
« Last post by BikeFreak on November 22, 2014, 01:12:28 am »
I am sorry yo say, but your product will not have commercial success for 2 main reasons:

1. The wear on the driveline will be 10x bigger than normal due to only 4 sliding members.
2. Due to the 4 sliding members, there will be a large torque variation 4 times for each revolution which will be annoying to the user. Remember, gearing is not determined by the radial distance of the 4 teeth sets, but by the radial, instant distance of the chain in the vertical top position. This position bounces up and down 4 times for each revolution.

However, I do find the automatic changing system interesting.

Lucas
30
Routes / Re: Atlantic Coast Route - Florida
« Last post by fnegron44 on November 21, 2014, 09:10:03 pm »
Hi etsisk:  Check out Larry and Penny Thompson Park.   It's something the locals know about and kind of off the beaten path.  Neighborhood is kind of rough but within the park you'll be fine.  Just a short ride off of US1 on 184 Street (Eureka Drive).  We are hosts on Warmshowers so don't hesitate to contact us if you need a place near Ft. Lauderdale.
Enjoy the ride....
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