shimano 600 compatible BB? alternatives?

[Dekonick]

I need a shimano 600 compatible BB for a single speed I am building up for a friend. Looking to do it a la cheap as its a favor.

Anyone know a source? (english thread)

[dwightskin]

Bike Tools Etc has a lot of bottom brackets.

Also, the Shimano un54 is readily available everywhere.

SomeFab also has bottom brackets.

[Marcusaurelius]

Although they are brands a little cheaper than a shimano bottom bracket they will not be as durable as the shimano.

[Dekonick]

ok - so short of measuring, what do I need for shimano 600 cranks with just the 39 ring (mounted to the outside so it doesnt look retarded) to standard 130 spaced rear wheel with a freewheel? (old serotta colorado AL frame) Just building a simple city bike for a friend (singlespeed) - trying to get the correct chainline the first time.

Ill be using the shimano un54 (thanks for the tip!)

I am used to campy, and that would use a 102mm - but I built up my fixed gear with a 103 and a sugino singlespeed crank w eno hub - that chainline is spot on. I was looking at Sheldon's old site and couldn't find what I was looking for.

[peanutgallery]

ok - so short of measuring, what do I need for shimano 600 cranks with just the 39 ring (mounted to the outside so it doesnt look retarded) to standard 130 spaced rear wheel with a freewheel? (old serotta colorado AL frame) Just building a simple city bike for a friend (singlespeed) - trying to get the correct chainline the first time.

Ill be using the shimano un54 (thanks for the tip!)

I am used to campy, and that would use a 102mm - but I built up my fixed gear with a 103 and a sugino singlespeed crank w eno hub - that chainline is spot on. I was looking at Sheldon's old site and couldn't find what I was looking for.

115 was the standard, 113 was commonly used. 600 ultegra cranks were really wide, any narrower on the spindle and you will have arms hitting the chainstays.

[Dekonick]

So I assume I will need to add spacers (potentially) to the rear to get chainline right.

[peanutgallery]

Unfortunately you will probably have to experiment a bit. Install the ring and see where you end up, but this is half the fun of wrenching on a bike