Merida SILEX 400

An adventure-ready gravel bike from 2023, made in 4 sizes from SM to XL. Fits tyres up to 38 mm.

Size

Stack 625 mmReach 400 mm

Geometry

Merida SILEX 400 geometry by frame size
Size
Fit
Stack (mm)How high the front sits	606	625	644	663
Reach (mm)How far forward the bars start	380	400	415	430
Stack ÷ reach Higher = more upright	1.59	1.56	1.55	1.54
Top tube (effective) (mm)Horizontal top-tube length	554	579	600	620
Seat tube angle Saddle position over the pedals	74°	74°	74°	74°
Seat tube length (mm)Frame size reference	470	500	530	560
Head tube length (mm)Front-end height	180	200	220	240
Standover (mm)Clearance when you stop	744	772	799	826
Handling
Head tube angle Steeper = quicker steering	71°	71°	71°	71°
Fork offset (mm)Fork rake	45	45	45	45
Trail (mm)More = steadier steering	73	73	73	73
Wheelbase (mm)Longer = more stable	1034	1060	1082	1103
Chainstay (mm)Shorter = snappier	430	430	430	430
BB drop (mm)More = lower centre of gravity	75	75	75	75
BB height (mm)Pedal clearance in corners	261	261	261	261
Front centre (mm)Room for your toes	615	641	663	684

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

An upright, steady position that suits loaded bikes and long hours in the saddle.

Size MD is more upright than 94% of the 106 gravel frames we track.

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

Bikes with a similar fit, compared with size MD of this bike
Bike	Size	Stack	Reach
Scott Speedster Gravel 202025Stack +2 mm, reach +3 mm	XXL/61	+2 mm	+3 mm
Basso Palta III2026Stack −5 mm, reach +5 mm	XXL	−5 mm	+5 mm
MMR X-Tour 002026Stack −9 mm, reach same	XL	−9 mm	same
Marin Gestalt 12025Stack −5 mm, reach +2 mm	58	−5 mm	+2 mm
Megamo JAKAR 202026Stack +7 mm, reach +7 mm	XL	+7 mm	+7 mm
Kross ESKER 1.02026Stack −1 mm, reach +6 mm	XL	−1 mm	+6 mm

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