frame size calculator

Aug 14, 2025Antoine Delmur
CYKL – FAAST calculator & models (saddle height, stem extension, saddle drop)

Calculator – FAAST (titanium) & other models

Minimal black & white style. Select a model , compare two sizes (A/B) with different stem lengths, and calculate the saddle height , stem extension , saddle drop and cockpit reach.

Size A
Size B
Sport-comfort drop marks: XS 55–65 · S 65–75 · M 75–85 · L 85–95 · XL 95–105 ·
Results
Seat height (mm)
Rod outlet A / B (mm)
Spacers A / B (mm)
Configuration A
Setting Value Ref
Configuration B
Setting Value Ref