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Limited time only. Subject to availability.
chameleon 4 0 hero 1
chameleon 4 0 detail 1
chameleon 4 0 detail 2


Model Version:4
Production Start:2008
Production End:2012
Suspension/Pivot System:N/A (Hardtail)
Material:Aluminum - 6000 series
Size Range:S,M,L,XL

Frame Specs

Compatible Forks:120mm to 140mm recommended. 160mm max.
Headtube/Headset:1-1/8" Straight - External. S.H.I.S EC34/28.6 EC34/30
Seat Post:30.9mm - Minimum insertion 100mm
Front Derailleur:34.9mm Top Pull/Top Swing (Low Clamp)
BB Shell Width:68mm - Threaded - ISO
Chainline Spec:50mm
Recommended Max Tire Size:2.35 - may vary by tire and rim model
Brakes:Disc Brake - ISO
Max Brake Rotor Size:203mm
Rear Hub:135mm x 10mm (QR style)
Seatpost Clamp:34.9mm
Component Notes:The Chameleon.4 uses an eccentric bottom bracket (E.B.B.) to adjust chain tension for single speed use. The E.B.B. is a simple wedge design, which requires little or no maintenance once setup correctly. If using a front derailleur, you can choose to have the E.B.B. at the 6 o’clock or 12 o’clock for different bb heights. It is best to use one of these positions for proper alignment with the front derailleur. When setting up the bike as a single speed, you can also choose between a higher and lower bb height. The advantages of this system over traditional horizontal dropouts are: perfect disk brake positioning, easy “set and forget” chain adjustment, and a consistent wheelbase length so your handling never changes. See PDF link attached below for EBB set-up and re-build details. chameleontech.pdf chameleontech.pdf

Torque Specs

*See Hardware Notes link below for EBB torque spec info-

Replacement Parts

chameleon 4 0 exploded 3
chameleon 4 0 exploded 2
chameleon 4 0 exploded 1