Author Ronin SL (2025)

gravel · steel · sizes 50 cm–58 cm Manufacturer’s website

Geometry ?

Author Ronin SL 2025 geometry in sizes 50 cm–58 cm: stack 548–628 mm, reach 378–397 mm, head angle 70.5–72°.

	50 cm	52 cm	54 cm	56 cm	58 cm
Stack	548 mm	569 mm	587 mm	607 mm	628 mm
Reach	378 mm	382 mm	386 mm	395 mm	397 mm
Head angle	70.5°	71°	71°	71.5°	72°
Seat angle	74.5°	74°	73.5°	73°	72.5°
Seat tube (c-t)	500 mm	520 mm	540 mm	560 mm	580 mm
Head tube	120 mm	140 mm	160 mm	180 mm	200 mm
Top tube (effective)	530 mm	545 mm	560 mm	580 mm	595 mm
BB drop	70 mm	70 mm	69 mm	68 mm	68 mm
Chainstay	425 mm	425 mm	425 mm	425 mm	425 mm
Wheelbase	1020 mm	1026 mm	1037 mm	1047 mm	1051 mm
Fork length	404 mm	404 mm	404 mm	404 mm	404 mm
Fork offset	50 mm	50 mm	50 mm	50 mm	50 mm
Stock build by size
Cranks	172 mm	172 mm	175 mm	175 mm	175 mm
Stem	70 mm	70 mm	90 mm	90 mm	90 mm
Bar width	440 mm	440 mm	440 mm	440 mm	460 mm

Source: cz.author.eu, checked 1 Nov 2026 · bar position: worked out from published data

Older model years in the archive with the same stack, reach and head angle: 2020–2024, 2026. Source: author.eu, en.author.eu

Older model years in the archive: Author Aura XR 2019–2024

Stock build

Ronin SL 2025-26

Source: cz.author.eu, checked 1 Nov 2026

Frames with similar geometry

Stack and reach within 12 mm of size 54 cm (stack 587 / reach 386 mm).

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