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 Comp's design and Cro-moly materials provide a light B/B, weighing only 289 grams (including 31.5 grams being the crank bolts). The Logic Comp uses a Cro-moly, forged spindle, that is all Black in color. The Comp has precision ground bearing cup races, with a deeply recessed rubber gasket at each spindle end.
Produced in Japan, the bearing retainers appear to be the same as those used in the XC Pro and Superbe Pro B/B. They have eleven 1/4" balls in a retainer. The spindle is now only available in the 120mm length. English thread only. $Price in Catalog
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
The Logic Pro WCS B/B uses the same single length spindle principle as the previous two Logic B/B's. It is made in Japan. The Cro-Moly steel bearing cups are finely machined with bearing surfaces ground and polished to an exceptionally smooth finish. The fixed right cup has the outer flange, on two sides, cut parallel for a fixed cup tool to grip. The left cup has six small holes for a pin spanner to make fine adjustments. The left cup is held rigidly in place by a machined aluminum lockring, which is one of the weight saving features. Both cups have a sturdy rubber seal where the spindle exits the cup.
The Logic WCS uses eleven 1/4" diameter steel ball bearing in a steel retainer in each cup. The spindle is machined of Silver colored Cro-Moly steel. It is hollow with the threads tapped for the crank bolts at both ends. The other weight saving feature is the pair of Titanium crank bolts and washers. Remember the steel set used in the other Logic B/B's weighed 31.5 grams, this Titanium set weighs just 15.5 grams per pair.
The WCS B/B comes only with 123mm long spindle and weighs with the Ti bolt set 268.5 grams. $Price in Catalog
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