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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 05-23-08, 01:01 PM   #1
Ty Ty
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Miche Advanced and IRD BB compatibility.

Will an IRD QB-75 JIS BB be compatible with the Miche Advanced Crank? I can't find a definitive answer.

Miche Advanced Specs:
Arm Length: 165.0 mm
Rings: 46
Spindle Interface Type: Square Taper ISO
Spindle Length: 107 mm
Chainring BCD: 144 mm
Bolt Pattern: 5-Bolt
Crank/FD Type: Single Ring
Chain Compatibility: 1/2" x 1/8"
Pedal Spindle: 9/16"

The IRD is an English 68mm Shell, 107mm Spindle Length, square taper.
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Old 05-23-08, 01:10 PM   #2
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It depends on your definition of compatible. The manufacturers of those cranks will tell you "No, do not put our ISO cranks on a JIS spindle." If you can't deal with ambiguity or uncertainty, I would take that as the definitive answer.

read more here:

http://www.sheldonbrown.com/bbtaper.html

EDIT: Also, it will not give you the chain line you want.

Last edited by huerro; 05-23-08 at 01:19 PM.
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Old 05-23-08, 01:18 PM   #3
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Thanks. Great answer. (Sheldon Brown was amazing.)
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