Remember, Ritchey has no manufacturing facility of their own. They have factories manufacture & package goods bearing the Ritchey brand name. Ritchey has had their Bottom Brackets made in Japan, which has proved awkward lately because of the dollar/yen exchange rate. Japanese goods have risen about 22% against the dollar which the currency that Ritchey backs all their calculations into. The dollar weakness has forced Ritchey to re-evaluate what they can afford to sell, now that American made B/B's will be so in-expensive relative to any Japanese B/B they can import. Shortages of Ritchey B/B's have already shown themselves, and there will be dry spell with price increases when they re-appear.
The Logic Pro bottom bracket is mechanically the same as the Logic Comp B/B, using the same bearing, bearing cup and spindle design principles. The Logic Pro, has however upgraded to Cro-moly steel precision ground bearing cups with a deeply recessed rubber gasket at each spindle end. The Logic Pro uses eleven 1/4" steel balls in a bearing retainer. The spindle is cast and machined, with the bearing races being precision ground after machining, made of hollow nickel-chromium steel.
The Ritchey Logic Pro B/B set fits a 68mm bottom bracket shell, while moving the bearings out to 78mm for extra strength, and hopefully lower the crank arm "Q" factor. The Logic Pro weighs 290 grams (with the 31.5 gram chrome plated crank bolts and washers).
The spindle is now only available in the 120mm length. English thread only. $Price in Catalog