Guerciotti Greto S (2026)

gravel · aluminium · sizes XXS–XL Manufacturer’s website

Good to know: Configurable build

Configurable build (at least partly: the cockpit or bar width, for example). The stock build below is only one of the options.

Geometry ?

Guerciotti Greto S 2026 geometry in sizes XXS–XL: stack 528–636 mm, reach 374–399 mm, head angle 70.5–72°.

	XXS	XS	S	M	L	XL
Stack	528 mm	542 mm	559 mm	584 mm	611 mm	636 mm
Reach	374 mm	377 mm	380 mm	386 mm	392 mm	399 mm
Head angle	70.5°	70.5°	70.5°	71°	71.5°	72°
Seat angle	75.5°	74.7°	74°	73.5°	72.5°	72.5°
Seat tube (c-t)	460 mm	480 mm	500 mm	520 mm	550 mm	580 mm
Head tube	100 mm	110 mm	133 mm	155 mm	173 mm	185 mm
Top tube (effective)	495 mm	510 mm	535 mm	550 mm	570 mm	585 mm
Chainstay	430 mm	430 mm	430 mm	430 mm	430 mm	430 mm

Source: guerciotti.it, checked 1 Nov 2026 · bar position: worked out from published data

Stock build

Greto S Shimano GRX 812 1x11

Greto S Shimano GRX 400 2x10

Greto S Shimano Sora 9s

Source for all builds: guerciotti.it, checked 1 Nov 2026

Frames with similar geometry

Stack and reach within 12 mm of size M (stack 584 / reach 386 mm).

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

Are you the manufacturer, or do you sell this bike? I’m missing 8 values for this model’s stem and bars. Add them