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Search: Posts Made By: fietsbob
Showing results 1 to 9 of 9
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Forum: Folding Bikes
10-26-15, 05:17 PM
Replies: 40
Views: 3,291
Posted By fietsbob

yea, list tick the box on Th Bi Fri Build Menu ...

yea, list tick the box on Th Bi Fri Build Menu





60 divided by 22 is the 2.727, x 20 " = is 54.54 gi/
Forum: Folding Bikes
10-25-15, 09:17 AM
Replies: 40
Views: 3,291
Posted By fietsbob

46 t CDX sprocket, on a Speed Drive crank,...

46 t CDX sprocket, on a Speed Drive crank, will act like a 76t

with the 22t freewheel 1 gear will be 2.09:1, the other 3.45:1 (gear 1 x 1.65)

20" wheel .. 40.8gi ; 69gi

a...
Forum: Folding Bikes
10-24-15, 05:58 PM
Replies: 40
Views: 3,291
Posted By fietsbob

Buying the Company, SRAM unbolted all the German...

Buying the Company, SRAM unbolted all the German Machinery from the shop Floors And shipped it all To Taiwan, Though

so New Wont Be German .

Have to scour the 2nd hand collections
Forum: Folding Bikes
10-24-15, 04:19 PM
Replies: 40
Views: 3,291
Posted By fietsbob

My Bike Friday (20" wheels ) has a Rohloff hub ...

My Bike Friday (20" wheels ) has a Rohloff hub rear hub cog is a 16, front a 53. that is the 11th speed in the gear sequence ..

the Schlumpf MD is in my Brompton 3 speed MD Its a 15: 54t,...
Forum: Folding Bikes
10-24-15, 01:47 PM
Replies: 40
Views: 3,291
Posted By fietsbob

Schlumpf also has that 2 speed crank and makes...

Schlumpf also has that 2 speed crank and makes his own Belt Cogwheels ..


Not automatic , but easy to shift with a tap of the center button with your heel, 1:1 and 1:1.65..overdrive.. ...
Forum: Folding Bikes
10-23-15, 01:39 PM
Replies: 40
Views: 3,291
Posted By fietsbob

Yea the 3 spline S-A cog is pretty common...

Yea the 3 spline S-A cog is pretty common standard after a lifetime of making them, so you can find the Belt cogwheel to fit.

just hope you can set up the actual gear ratios you like with...
Forum: Folding Bikes
10-23-15, 11:33 AM
Replies: 40
Views: 3,291
Posted By fietsbob

Not really .. there is a replaceable dropout ...

Not really .. there is a replaceable dropout that pivots around a Bolt*, and a tension screw that pushes the dropout rearwards .

*I Think they use a flush fitting Standard chainring bolt to...
Forum: Folding Bikes
10-23-15, 09:20 AM
Replies: 40
Views: 3,291
Posted By fietsbob

Bike Friday takes a different approach , when...

Bike Friday takes a different approach , when taking in the needs for a IGH/Single speed chain tension into consideration..

But the New NWT design , placing the BB as part of the rear portion,...
Forum: Folding Bikes
10-22-15, 12:25 PM
Replies: 40
Views: 3,291
Posted By fietsbob

JRA, 3 speeds .. 1 for tail winds, 1 for head...

JRA, 3 speeds .. 1 for tail winds, 1 for head winds , but Sturmey Archer S1C is made for people like You .
Sturmey Archer | Products (http://www.sturmey-archer.com/en/products/1-speed)
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