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Hi all,

Me again (the big bike build starts today so expect a few questions on here!)

First job is fitting the bottom bracket (Shimano SM-BB70) that came with the chainset. Am I right in thinking for a 68mm shell its two washers drive side and one on the other?

Cheers

Have a look at this explanation on sheldon brown covers it all.

http://sheldonbrown.com/chainline.html

It is usually but it would be worth checking the tech manual on the shimano website

If you're using a conventional front mech then yes. There should be a pamphlet that come with the chainset/BB that explains what spacers to use with different BB widths and mechs.

Thanks all for your answers.

Hopefully have it all done now.