Merida REACTO 4000

A race-focused road bike from 2022, made in 4 sizes from SM to XL. Fits tyres up to 30 mm.

Size

Stack 557 mmReach 395 mm

Geometry

Merida REACTO 4000 geometry by frame size
Size
Fit
Stack (mm)How high the front sits	542	557	571	593
Reach (mm)How far forward the bars start	390	395	400	409
Stack ÷ reach Higher = more upright	1.39	1.41	1.43	1.45
Top tube (effective) (mm)Horizontal top-tube length	545	560	575	590
Seat tube angle Saddle position over the pedals	74°	73.5°	73°	73°
Seat tube length (mm)Frame size reference	520	540	560	590
Head tube length (mm)Front-end height	128	140	155	176
Standover (mm)Clearance when you stop	792	810	826	853
Handling
Head tube angle Steeper = quicker steering	72.5°	73.5°	73.5°	74°
Fork offset (mm)Fork rake	45	45	45	45
Trail (mm)More = steadier steering	59	53	53	50
Wheelbase (mm)Longer = more stable	990	990	999	1010
Chainstay (mm)Shorter = snappier	408	408	408	408
BB drop (mm)More = lower centre of gravity	66	66	66	66
BB height (mm)Pedal clearance in corners	270	270	270	270
Front centre (mm)Room for your toes	591	591	600	611

Underlined values are calculated by BikeLens. A dash means the brand doesn't publish it.

A low, stretched position built for speed. Suits flexible riders who like to ride fast.

Size MD is lower and longer than 70% of the 218 road frames we track.

The closest road frames from other ranges, against size MD here.

Bikes with a similar fit, compared with size MD of this bike
Bike	Size	Stack	Reach
Merida SCULTURA 10K2026Stack same, reach same	MD	same	same
Specialized Tarmac SL7 Comp - Shimano 105 Di22025Stack −2 mm, reach +3 mm	56cm	−2 mm	+3 mm
Canyon Ultimate CF 7 Di2 A.502026Stack +3 mm, reach −2 mm	M	+3 mm	−2 mm
Canyon Aeroad CF SLX 7 AXS NSW2026Stack +3 mm, reach −2 mm	M	+3 mm	−2 mm
Cube Litening Air C:68X Pro2026Stack +6 mm, reach +3 mm	56	+6 mm	+3 mm
Megamo RAISE 01 SLR2026Stack −7 mm, reach +1 mm	L	−7 mm	+1 mm

These builds share this exact geometry, so they fit the same.