Cycling Equipment · Public discussion

Changing from squared to splined BB

Started by sizkokid · · Last activity · 2 posts · 1,118 views

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Cycling Equipment
Published
2 October 2003
Last activity
3 October 2003
Original author
sizkokid
Posts
2
Discussion status
Public discussion
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1,118
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0
Topics
Bottom bracketsDrivetrain compatibility

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  1. Original post
    sizkokid
    Archived post
    #1

    The bike I currently ride (Basso Ascot 1990) has an Italian Threaded(36x24) Shimano 600 Ultegra Bottom Bracket. I want to change that to a new splined Bottom Bracket. What model should I ask for? Now I see the reference for Italian BB listed as 70x109.5mm. Which will fit my bike?

    Sizko

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  2. PSR
    Archived post
    #2
    Quoted post said:

    Originally posted by sizkokid
    The bike I currently ride (Basso Ascot 1990) has an Italian Threaded(36x24) Shimano 600 Ultegra Bottom Bracket. I want to change that to a new splined Bottom Bracket. What model should I ask for? Now I see the reference for Italian BB listed as 70x109.5mm. Which will fit my bike?

    Sizko

    Italian BB's are denoted now by the 70 mm measurement whereas English are 68 mm.

    The 109.5 is the version which is compatible with double cranksets while the 118 is the triple version.

    Report

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