Boma Sai Ct Sa (2026)

road · carbon · sizes XS-460–L-525 Manufacturer’s website

Geometry ?

Boma Sai Ct Sa 2026 geometry in sizes XS-460–L-525: stack 502–541 mm, reach 367–384 mm, head angle 71–73°.

	XS-460	S-465	SM-485	M-505	L-525
Stack	502 mm	509 mm	516 mm	523 mm	541 mm
Reach	367 mm	374 mm	381 mm	384 mm	384 mm
Head angle	71°	71°	72°	72.5°	73°
Seat angle	74.5°	74.5°	74.5°	74°	73.5°
Seat tube (c-t)	460 mm	465 mm	485 mm	505 mm	525 mm
Head tube	95 mm	110 mm	115 mm	120 mm	136 mm
Top tube (effective)	505 mm	515 mm	525 mm	535 mm	545 mm
BB drop	69 mm	69 mm	69 mm	69 mm	69 mm
Chainstay	410 mm	410 mm	410 mm	410 mm	410 mm
Wheelbase	975 mm	977 mm	978 mm	979 mm	980 mm
Fork offset	43 mm	43 mm	43 mm	43 mm	43 mm

Source: boma.jp, checked 12 Nov 2026 · bar position: worked out from published data

Stock build

I don’t have the build for each size yet.

Frames with similar geometry

Stack and reach within 12 mm of size SM-485 (stack 516 / reach 381 mm).

Spotted a mistake or a missing build? Let me know.

Are you the manufacturer, or do you sell this bike? I’m missing 7 values for this model’s stem and bars. Add them