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Coming to a Paved (or not) Surface this April

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Coming to a Paved (or not) Surface this April

Old 02-06-19, 11:07 AM
  #26  
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Originally Posted by RobbieTunes View Post
... it's Monday....
Originally Posted by pastorbobnlnh View Post
Isn't it actually Tuesday?
Welcome to Robbie's World.
Every day's a holiday, every meal's a feast.
Every girl's a beauty, every man's a beast.


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Old 04-04-19, 02:35 PM
  #27  
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Getting there. One small engineering challenge to surmount (I have a plan), and then several adjustments to make.

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Old 04-04-19, 02:41 PM
  #28  
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More cable than a Walmart mountain bike.
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Old 04-04-19, 03:49 PM
  #29  
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Originally Posted by RobbieTunes View Post
More cable than a Walmart mountain bike.

DI2 Alfine11 combined with Sram wireless.......cable reduction and lots of gears 11x11x2 242 for the win
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Old 04-04-19, 04:34 PM
  #30  
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Originally Posted by squirtdad View Post
DI2 Alfine11 combined with Sram wireless.......cable reduction and lots of gears 11x11x2 242 for the win
363 > 242.

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Old 04-04-19, 07:54 PM
  #31  
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@USAZorro well done! More about your "engineering challenge."

BTW, my 81 speed Cannondale is in the middle of a winter/spring makeover. I'm replacing the triple with a 47-36 double and the cassette with a 11-36, so all the gear charts above can be tossed out as it downgrades to a 54 speed.
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Old 04-05-19, 06:36 AM
  #32  
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Originally Posted by pastorbobnlnh View Post
@USAZorro well done! More about your "engineering challenge."
...
The challenge is with the fulcrum clip. I have one that will fit the downtube, but not the top tube or the chainstay. Sooo.... Will take pictures after I get it working - which probably won't be until Monday.
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Old 04-05-19, 06:48 AM
  #33  
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Whatever is going on I support it.

I've been wanting to try one of the NuVinci hubs for a while now. Too pricey.
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Old 04-08-19, 04:50 PM
  #34  
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ok - it's done... almost

Engineering challenges solved:

3-speed cable fulcrum equivalent installed (thanks to Mark at the LBS for refining the idea I had, and letting me have the part)


The other technical challenge that I got ideas for solving on another thread here. Not the prettiest part, but it was in the bin.



and a couple shots of the drivetrain. I especially liked the idea of throwing Sir Walter's reflectorized pedals on it...




This is the good news, including the fact that the bike does indeed shift through all the gears, and there are no chain issues with the range - especially given the 34-36-40 triple up front.




I want to give it a good shakedown ride before this weekend, but first, I need to address the issue of the slight shimmy in the headset. Hoping Mark has a little time to help me sort it out. I've tried two different sizes of balls, and this one just wants to be a bugger.
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Old 04-08-19, 06:35 PM
  #35  
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Wow John, that's certainly an interesting drivetrain. Looking forward to seeing it in person (and in action) this weekend.

Drive carefully.
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Old 04-08-19, 07:03 PM
  #36  
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81 fantastic gears! Superb!
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Old 05-30-19, 06:16 AM
  #37  
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Originally Posted by USAZorro View Post
ok - it's done... almost

Engineering challenges solved:

3-speed cable fulcrum equivalent installed (thanks to Mark at the LBS for refining the idea I had, and letting me have the part)


The other technical challenge that I got ideas for solving on another thread here. Not the prettiest part, but it was in the bin.



and a couple shots of the drivetrain. I especially liked the idea of throwing Sir Walter's reflectorized pedals on it...




This is the good news, including the fact that the bike does indeed shift through all the gears, and there are no chain issues with the range - especially given the 34-36-40 triple up front.




I want to give it a good shakedown ride before this weekend, but first, I need to address the issue of the slight shimmy in the headset. Hoping Mark has a little time to help me sort it out. I've tried two different sizes of balls, and this one just wants to be a bugger.
I’m just so intrigued by your setup of the CS-RF3 hub that I’m considering doing a build. What would you say is the minimum O.L.D. For this hub?
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Old 05-30-19, 09:10 AM
  #38  
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I really like the fulcrum stop on the seatpost binder. I'll keep that idea in my head for later....
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Old 05-30-19, 09:41 AM
  #39  
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11 gear inches? I don't know if I could keep my bike upright spinning at that low a gear!
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Old 05-30-19, 09:48 AM
  #40  
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Aren't you worried that one of those gear combos might rip a hole in the fabric of time and space? Or that the hub may catch fire?

Seriously kudos on your Ludacris number of gears - take that hipsters!

Next step add both disc and hub brakes to the calipers.
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Old 05-30-19, 12:05 PM
  #41  
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Any ride reports yet?
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Old 05-30-19, 03:05 PM
  #42  
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Originally Posted by pastorbobnlnh View Post
This winter I've been working on upgrades to my Dahon folding travel bike (yes, it fits in a suitcase and flys for free on Southwest!). I stumbled upon a 20" (406mm) Dual Drive wheel on ebay and I couldn't resist. I ended up finding a matching rim Biologic Joule II dynamo hub with the same rim for a matching wheelset. It is a 2X9X3 system. The set up is not quite perfected yet, so the final is yet to be seen and will not be as pictured below. I'm planning on a test ride in the church fellowship hall soon and will post a thread in the Folding Bike Forum.


I'm close to modifying my Dahon as well, I need lower gears for the hills, without compromising the top end. I wanted to stay away from an IGH due to complexity of annual teardown and lube in wet environments, as well as weight, and efficiency in the non-direct drive gears. As such, I'm going with a triple crank, with the 20" wheels, a road triple with 30 ring and 11-32 cassette will get me the 17 gear inch low that I need, which is the same as a mountain bike I tried out, I need the same low.

With the right rear rack, carrying the panniers high and well aft, a large trunk bag, a front rack with panniers, and a large handlebar bag or backpack over the front bars, it already makes a great townie and semi-tourer with heavy loads. I have yet to load it up with camping gear (in storage) to see how well it accommodates enough for a proper tour.

I decided against a dynamo front hub due to the efficiency of LED lights and the low cost of a solar charger, but that could change.
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Old 05-31-19, 05:27 AM
  #43  
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@durogrouch, sounds as if you have thought out a well equipped 406mm tire touring bike. Post and talk about it in the "Folding Bike" sub forum after your mods are complete.

FWIIW, I've run the SRAM Dualdrive IGA on my Cannondale 26" wheeled hybrid for 16+ years without a service and everything is still running perfectly. Also I've never had any efficiency issues when using the low or high IG. When comparing riding my Dahon with or without the Dual Drive, I miss the IG high when descending. I quickly "spin out" on my non-IGA high gear which is currently 53X12.
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