Cane Creek 40-Series Traditional Conversion Bottom for 49mm Head Tube Review

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Bottom assemblies include bottom cup, sealed oxide bearing, and crown race
External Cup (EC) assemblies feature press-in cups with bearings outside the frame
Replaces Cane Creek XXcII Traditional Bottom headset
Internal parts are cross-compatible across 1, 4 and 11 series

6061-T6 alloy construction
Innovative Clip Seal seals the top assembly and captures the compression ring for fewer loose parts
Durable steel crown race
Black oxide cartridge bearings

Cane Creek 40 series Bottom Assemblies

Replaces Cane Creek XXcII Traditional Bottom headset
External Cup (EC) assemblies feature press-in cups with bearings outside the frame
Replaces Cane Creek XX-44 headset
Bottom assemblies include bottom cup, sealed oxide bearing, and crown race
EC44/40 Conversion Bottom fits 1-1/8″ 44mm standard head tube bottom (44mm inner diameter)
Consistent stack heights across 10, 40 and 110 Series
For use with 1.5″ threadless steerer tube bottom (40mm crown race seat diameter, tapered steerer tube)
Internal parts are cross-compatible across 10, 40 and 110 series
Converts 44mm head-tube bottom for use with 1.5″ 40mm crown race forks
Durable steel crown race with low-friction face-seals
External Cup (EC) 44mm Bottom Assembly enables use of tapered steerer tube
External Cup (EC) assemblies feature press-in cups with bearings outside the frame
Combine with 44mm 1-1/8″ ZeroStack Top Assembly for complete 44mm straight head-tube installation
Internally relieved AL-6061 T-6 cup
Assembly includes 1.5″ black oxide steel bearing and 40-Series 1.5″ crown race

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