Bikes / Mason / Definition

Mason Definition 2025 Geometry, Reviews, and Specs

Fit and steering

Aggressive fitSlow steeringFast steeringRelaxed fit

Weight—

Climbing2.2

Aero6.7

Comfort7.8

Size	Stack	Reach	Stack/reach	Stem	Bar	Crank	Head tube angle	Seat tube angle	Chainstay	Wheelbase	BB drop	Wheel size
48	530 mm	367 mm	1.44:1	80 mm	380 mm	165 mm	71.0°	74.5°	422 mm	998 mm	74 mm	700c
51	548 mm	373 mm	1.47:1	90 mm	400 mm	170 mm	71.5°	74.0°	422 mm	1006 mm	74 mm	700c
54	566 mm	379 mm	1.49:1	100 mm	420 mm	172.5 mm	72.0°	73.5°	422 mm	1014 mm	72 mm	700c
56	584 mm	385 mm	1.52:1	100 mm	420 mm	172.5 mm	72.5°	73.0°	422 mm	1024 mm	72 mm	700c
58	602 mm

No colorway catalog for 2025 yet.

Same published geometry as 2024.

Published geometry matches the 2024 Mason Definition. Same sizes, same stack and reach.

No verified spec sheet for 2025 or 2024.

No launch MSRP in the catalog yet.

Mason Definition 3.0 - Cycling News | Bike Reviews - Road.ccroad.cc · 2024