There has been an increase in the use of oversized headsets. Tom Ritchey believes the trend to larger oversized headsets is unfounded. Tom's approach is different. If you think about it, the lower bearing race is the one that accepts all the impact. Every time the front fork comes down with weight on it, it tries to crush the lower bearings. The upper bearings however are necessary, but only to hold the upper part of the fork stable and in line with the lower part of the fork. There is little or no impact on the upper bearing system. Mr. Ritchey has also reasoned that contrary to popular thinking, a greater number of smaller ball bearings does not give more surface contact on the bearing race than the same number of larger ball bearings. In the Ritchey Logic Headsets all this thinking comes together. Both the Ritchey Logic Expert and the Logic Comp come with 18 of the standard 1/8" ball bearings on the top, where there is no real load bearing and 18 larger 3/16" ball bearings on the bottom for greater surface contact and heavy abuse. All the cup and cone races, all parts but the head lock nut, are precision ground cro-moly steel. There are also plastic seals to prevent contamination to both races. The Logic Expert headset has a steel head lock nut while the Logic Comp comes with an aluminum alloy head lock nut which makes the Logic Comp 15 grams lighter than the Logic Expert headset. The Ritchey Logic Comp Headset weighs only 117 grams, while the Expert Comp is 132 grams. Both are made in the standard 1" size, the Expert is also made in the 1 1/8" size, and the 1 1/4" size. These headsets have a 33mm stack height. This headset is made in Japan by a company called Mori. It exhibits superior workmanship. The Logic Comp headset comes in Black or Silver, and the Logic Expert comes in Silver.