b746cdd5_al_White_Paper___Calfee_Design__0
[1] Lightweight No galvanic corrosion problems at lugs Better approach than metal lugs Good cost-benefit ratio (Trek OCLV and Calfee Luna) Custom geometry possible (although difficult) [2] Uneven load path at the lugged joints causes the forces to concentrate at the bonded interfaces leading to possible failure. (unless accommodated with substantial bond surface area) Use of blind rivets and bonding-on of fixtures (opportunity for warranty problems to surface) Bladder molded lugs have seams, parting lines, and discontinuous wall thickness (Trek only) Extensive use of aluminum for head tube sleeve, bottom bracket, and drop-outs (except for the Luna and Dragonfly which employ aluminum insulated from the carbon with fiberglass and uses Ti dropouts) Use of body filler and requires paint to cover the filler (Trek only) Uneven distribution of stresses at joints (although Luna and Dragonfly have tapered lugs) RTM fabricated Lugs have high resin-fiber ratio and are expensive (Colnago only) [3] Trek OCLV Parlee Colnago C-40 Calfee Luna and Dragonfly [0] 
Carbon Tubes/Molded Carbon Lugs
Technical White Paper | Calfee Design
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