Bottom Bracket/Chainline Question

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I have assembled all parts for a new Salsa Casseroll build with the exception of a Phil Wood bb since I was unsure which length to get to achieve the best chainline. The Casseroll has 130mm rear spacing and forward-entry horizontal dropouts allowing me to run fixed/ss/ or geared setups. Should I go with the cranks spec'd length of 113mm allowing for possible future use in a geared setup? or is there a better alternative with a decreased q factor?

Here are the drivetrain parts that I am working with:

NOS- Shimano 105 FC-1055 (double) cranks
44T surly chainring
3/32 16T EAI cog
3/32 White Industries freewheel
130mm Paul Comp. high flange hub fixed/free/ Paul lockring

Thanks for any and all help!

Chris

I have assembled all parts for a new Salsa Casseroll build with the exception of a Phil Wood bb since I was unsure which length to get to achieve the best chainline. The Casseroll has 130mm rear spacing and forward-entry horizontal dropouts allowing me to run fixed/ss/ or geared setups. Should I go with the cranks spec'd length of 113mm allowing for possible future use in a geared setup? or is there a better alternative with a decreased q factor?

Here are the drivetrain parts that I am working with:

NOS- Shimano 105 FC-1055 (double) cranks
44T surly chainring
3/32 16T EAI cog
3/32 White Industries freewheel
130mm Paul Comp. high flange hub fixed/free/ Paul lockring
What is your option -- 107mm?

At first blush, I presume you are thinking that the chainine will be ~3mm off if you opt for the 113mm BB spindle ... BUT, I think that those 107mm spindles are really intended for:

a crank which uses a symmetrical spindle
a frame with 120mm rear spacing & you've got 130mm rear spacing
Is the flange spacing WIDER (as I believe they are on a SURLY rear hub) OR do they have the traditional separation?

If wider, I presume the hub is more-or-less intended to be used with a standard length BB spindle. Ask the vendor.

FWIW. Personally (not that it should matter what 'I' think or would choose to do), I would opt for the "normal" BB spindle because a slight offset (if it exists) does not matter with a Single Speed freewheel ...

If you're concerned with the offset on the Fixed side, presuming a threaded axle, you can adjust the dish on the rear wheel so that the Fixed cog lines up perfectly with the chainring & allow the freewheel side to be slightly off line.

To state the obvious, you can mount the chainring on EITHER the inner OR outer shoulder ...