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anyone know the bcd of Sugino RJX-1

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anyone know the bcd of Sugino RJX-1

Old 10-12-09, 01:18 PM
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dinosore
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anyone know the bcd of Sugino RJX-1

i couldnt find it via sheldon brown, forums, google...nothing... so if anyone happens to know the bcd for Sugino RJX-1 40-52(chain rings) i would appriciate it. i know i can measure the cranks them selves but i dont trust my measuring abilities especially with bcd's. thanks all.
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Old 10-12-09, 01:40 PM
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I think that crank was a 130bcd.

However, to be sure, here's sheldon:

Measuring BCD: A 110 mm BCD ring measures 64.7 mm center-to-center.

Multiplying this dimension by 1.7 will give you the actual BCD for a 5 bolt chainring.

Use 1.4 for 4 bolt chainrings

http://www.sheldonbrown.com/gloss_bo-z.html
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Old 10-12-09, 02:13 PM
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Thanks...I found the measuring system on sheldon but I don't trust my eyes...

Can anyone verify that these old cranks are 130bcd?
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