Resources

[jateureka]

$16 kit to swap a one-piece Beach-Cruiser/BMX-style crank (with large-diameter bearings) to a "small bearing" 3-piece square-shank Bottom-Bracket (BB) drive. The square shank-BB is needed to install the front-BB freewheels described earlier in the resources thread, and many "Cruiser style" bike frames still use the one-piece crank.

You can also get a converter for OPC to cartridge BB. http://harriscyclery.net/product/tr...-conversion-american-to-euro-adapter-1335.htm
http://www.bikepartsmart.com/bike-components/crank-bottom-brackets/conversion-kits.html

Aussies can get your LBS to order the part from wholesaler Pyramid Imports http://pyramidimports.com.au/catalo...id=70&osCsid=f2b213fd291e40a55becc2f82164a81b

British BB's use the same thread as the freewheels, 1.37" x 24tpi.

 

[spinningmagnets]

This $15 adapter from Staton-inc allows you to attach a 3-tab fixed sprocket and also a common 1.38 X 24 freewheel (FW) onto a shaft. The only currently available ID is 3/4-inch (0.750" / 19.05mm).

3-tab sprockets are common on Internally-Geared-Hubs (IGH) like Sturmey-Archer and Nexus. They are easily found in 16T-22T, FW sprockets are also commonly found in 16T-22T.

FW-threaded (1.38 X 24) fixed sprockets are available with tooth-counts as low as 13T.

http://www.staton-inc.com/store/pro...freewheel_Sprocket_3_prong_Design-815-27.html

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I have contacted Staton-inc (along with others) requesting FW-to-shaft adapter that were only bored with a small pilot-hole so the buyer can have them bored to a custom ID (or just a snug fit, rather than the sometimes sloppy fit found), and they responded that it was "in the works". I suggested a 1/4-inch bore, but they have decided it would be best right now to provide FW-adapters that have no bore at all. These are available in the common BSA FW thread, sometimes listed as 1.37 X 24, 1.375 X 24, and 1.38 X 24.

http://www.staton-inc.com/store/pro...th_up_1_37_x_24_tpi_OD_right_hand-1863-0.html

For those who want a FW with the absolute smallest tooth-count of 13T, they also have unbored FW shaft adapters in the 30mm X 1.0 thread for $13 (right-hand threads only).

http://www.staton-inc.com/store/pro...5_teeth_30_mm_x_1_0_OD_right_hand-1864-0.html

 

[HAL9000v2.0]

Some guys asked me to repeat the hxt motor because the file is corrupted.
So here it is.

 

[spinningmagnets]

Freehub large sprocket spider. I believe this design was intended to reduce the weight of the stock sprocket cluster, which has an accidental benefit to us. I don't know what the 6-hole BCD interface is yet

http://www.aliexpress.com/item/New-...freewheel-flywheel-Round-tower/904240835.html

 

[full-throttle]

I don't know what the 6-hole BCD interface is yet

Shimano XT 10sp 11-36 the 2 BCD are 90mm and 108mm for the large 6-hole spider. There's also a smaller 5-hole spider which is 50mm BCD. SLX is prob the same. 11-32 and 11-34 sprockets are likely to have different BCD spiders.

 

[spinningmagnets]

New product, no feedback yet on how well this works, $17 + T&S

http://custommotoredbicycles.com/disc_brakes_rotors_26_inch_wheels_conversion_brackets

 

[spinningmagnets]

Origin8 adapter that attaches a 6-hole ISO disc brake interface to a splined cassette. Since there are sprockets with a splined center, this adapter allows someone to attach a splined sprocket to a cassette freehub. Could be used as a jackshaft.

"Origin8 Bicycle ULTIM8 Single Speed 6 Bolt And Cassette Cog"

 

[spinningmagnets]

The Oset company makes a line of electric dirt motorcycles for children and teens. They carry a variety of sprocket sizes that bolt onto a common bicycle 6-hole disc brake interface, and now...they also carry a 6-arm spider that attaches to a ISO disc brake 6-hole interface, and mounts common Kart chainrings, using #219 chain.

http://osetbikes.com/us/parts/sprockets/

https://endless-sphere.com/forums/viewtopic.php?f=28&t=59122&start=100#p1238046