Dura ace BB versus UN54 etc.

Posted on Mon 15th, September 2008

• #1

Ant

I have Dura ace cranks. In the Transmission Database most DA crank people are using 107mm BBs.

The 7600 and 7610 BBs are 109mm

How does the 107mm give a correct chainline with the 7600 DA cranks?

I'm gonna order one up now, and if it doesn't work I'm going to cry and throw my toys out of the pram.

Thank you

x
• #2

Shinscar

I noticed that the un54, which used to be the un53 has now got a plastic.... yes that's plastic threaded capping... which is completely shit!
• #3

dogsballs

thats why you go to the UN7X which is metal ;)
• #4

provenrad

it is lighter.
• #5

dogsballs

i've always had trouble fitting the plastic ones as my BB tool doesn't fit, so i just use some big vice grip things :p
• #6

Shinscar

TBH though the chainline is sweet... bit of noise from the chain but its cheap, can't be helped.
• #7

Ant

I just need something to get me rolling for Sunday. I'll replace it with something decent if it breaks.
• #8

flickwg

dura ace all the way, bb, cranks, ring, cog, lockring
• #9

rpm

Dura Fuckin Ace

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