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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Cog ID
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Author Topic: Cog ID  (Read 844 times)

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Offline Mikku

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Cog ID
« on: August 02, 2017, 12:43 PM »
I was rummaging through a sale box in a Tokyo BMX shop the other day and found these 2 cogs in an unmarked bag. The only marking they have on them is the tooth size, and from what I can gather by looking at the splines and digging around online, they're either older Shimano DX cogs or Shimano-compatible ones. Being a bit of a newbie when it comes to cassette hubs, does anyone recognize 'em? Thanks in advance! :daumenhoch:
From Dorset to Japan:- http://www.radbmx.co.uk/forum/index.php/topic,182215.0.html
Ok riders, random start. Riders ready, watch the gate old gaijin make a fool of himself! :D

Offline insectbones

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Re: Cog ID
« Reply #1 on: August 02, 2017, 09:58 PM »
I'm sure early skyways had those type cogs too Mick  :daumenhoch:

Offline Mikku

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Re: Cog ID
« Reply #2 on: August 03, 2017, 02:44 AM »
Thanks Lee! Now I just need to work out if I can use them! ::)
From Dorset to Japan:- http://www.radbmx.co.uk/forum/index.php/topic,182215.0.html
Ok riders, random start. Riders ready, watch the gate old gaijin make a fool of himself! :D

monkian

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Re: Cog ID
« Reply #3 on: August 03, 2017, 05:03 PM »
Nice little find Mick. They look like they could well fit Shimano cassette hubs. There were two different versions for BMX though and I think the cog fitting was different on them. Unfortunately I haven't got one here to check for sure. Suntour also made a BMX cassette hub. I guess they'd most likely be for a Japanese brand ;)

monkian

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Re: Cog ID
« Reply #4 on: August 03, 2017, 06:21 PM »
Not sure if this helps Mick but here's some shots of the Shimano cassette hubs from the 81 JBM catalogue:






Offline Mikku

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Re: Cog ID
« Reply #5 on: August 04, 2017, 04:45 AM »
Thanks for posting that Paul. The teeth on those cogs look to be directional (not sure if that's the right word but you know what I mean!) whereas mine aren't. However, I've seen some others that look more like mine, so maybe there were 2 versions.
From Dorset to Japan:- http://www.radbmx.co.uk/forum/index.php/topic,182215.0.html
Ok riders, random start. Riders ready, watch the gate old gaijin make a fool of himself! :D

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Cog ID
 

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