Old Ritchey Logic silver --> BB size?

[Andreas]

Sounded as if a fair number of people are using these (given the replies in the recent Ritchey WCS compact thread). Ritchey Logic silver, square taper, made by Sugino.

What bb size do you use for
a) double
b) triple

Thank you.

Andreas
Etna, NH
(who took the first dive on a ice patch two days ago... almost time for studded tires again)

[Marcusaurelius]

If you are talking about the 110mm triple logic crankset it usually around 110-113mm depnding on your frame. I always avoided the logic crankset because of it's low q factor.

[Andreas]

If you are talking about the 110mm triple logic crankset it usually around 110-113mm depnding on your frame. I always avoided the logic crankset because of it's low q factor.

Yep, that's the one.
Would it make a difference to run it double vs. triple?

[PacNW2Ford]

The original Logic MTB Triple BB was 120mm with a chainline of ~48mm. I have used 114mm Phil spindles for road triples with a chainline of 45mm.

I think the original Ritchey road spec BB was ~108mm. I suspect a 109-111mm spindle would work well for a double.

[zeroking17]

I believe that the original recommended spindle length for the double cranks was 107 or 108. I'm currently using a Phil Wood 108 for the Logic double cranks, and the chainline is fine.

[Ray]

I believe that the original recommended spindle length for the double cranks was 107 or 108. I'm currently using a Phil Wood 108 for the Logic double cranks, and the chainline is fine.
Same thing here - I run Phil 108 or Shimano 107 and both are fine.

-Ray