MMR Simun 70

A race-ready gravel bike from 2026, made in 4 sizes from XS to L. Fits tyres up to 45 mm.

Size

Stack 525 mmReach 380 mm

Geometry

MMR Simun 70 geometry by frame size
Size
Fit
Stack (mm)How high the front sits	515	525	550	575
Reach (mm)How far forward the bars start	370	380	390	400
Stack ÷ reach Higher = more upright	1.39	1.38	1.41	1.44
Top tube (effective) (mm)Horizontal top-tube length	513	526	548	576
Seat tube angle Saddle position over the pedals	74.5°	74.5°	74°	73°
Seat tube length (mm)Frame size reference	440	460	480	510
Head tube length (mm)Front-end height	87	95	121	146
Standover (mm)Clearance when you stop	754	759	791	818
Handling
Head tube angle Steeper = quicker steering	70.5°	71°	71°	71.5°
Trail (mm)More = steadier steering	50	50	50	50
Wheelbase (mm)Longer = more stable	998	1007	1026	1039
Chainstay (mm)Shorter = snappier	425	425	425	425
BB drop (mm)More = lower centre of gravity	73	73	73	73
BB height (mm)Pedal clearance in corners	263	263	263	263

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

A racy stance with road-bike efficiency on fast, mixed surfaces.

Size S is lower and longer than 98% of the 106 gravel frames we track.

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

Bikes with a similar fit, compared with size S of this bike
Bike	Size	Stack	Reach
Cervelo Áspero-52026Stack same, reach −3 mm	51	same	−3 mm
Canyon Inflite CF SLX 72026Stack +2 mm, reach −4 mm	XS	+2 mm	−4 mm
Bmc Kaius 01 ONE2026Stack −4 mm, reach +5 mm	47	−4 mm	+5 mm
Trek Checkpoint SL 5 AXS Gen 32026Stack +10 mm, reach same	XS	+10 mm	same
Specialized Crux 5 Comp - SRAM Rival XPLR2027Stack +5 mm, reach −5 mm	49	+5 mm	−5 mm
Cervelo Áspero2025Stack +5 mm, reach −1 mm	51	+5 mm	−1 mm

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