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Photon Gen 2: Q Factor & Chainline Nov 30, 2025


BB Version

Q Factor

Chainline

Spacer of Left

Spacer on Right

Centre Offset

BSA 68mm

200 ~50 5 + 7 3 0.65

BSA 73mm

200 ~50 3 + 7 0 0.18

BSA 83mm

200 ~55 0 0 5.18

BB92

200 ~63 0 0 3.9

BSA 100mm

200 ~63 0 0 3.9

BSA 120mm

230 ~73 0 0 3.9

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