Cannondale Synapse LAB71 SmartSense

An all-round road bike from 2026, made in 7 sizes from 44 to 61.

Size

Stack 570 mmReach 381 mm

Geometry

Cannondale Synapse LAB71 SmartSense geometry by frame size
Size
Fit
Stack (mm)How high the front sits	510	530	550	570	590	610	640
Reach (mm)How far forward the bars start	366	371	376	381	387	393	402
Stack ÷ reach Higher = more upright	1.39	1.43	1.46	1.50	1.52	1.55	1.59
Top tube (effective) (mm)Horizontal top-tube length	522	533	544	555	567	579	598
Seat tube angle Saddle position over the pedals	73°	73°	73°	73°	73°	73°	73°
Seat tube length (mm)Frame size reference	407	407	443	480	520	550	590
Head tube length (mm)Front-end height	91	108	127	150	171	196	227
Standover (mm)Clearance when you stop	714	722	752	785	815	843	878
Handling
Head tube angle Steeper = quicker steering	69.8°	70.9°	71.3°	71.3°	71.3°	71.3°	71.3°
Fork offset (mm)Fork rake	55	55	55	55	55	55	55
Trail (mm)More = steadier steering	71	64	61	61	61	61	61
Wheelbase (mm)Longer = more stable	1003	1005	1013	1026	1044	1058	1077
Chainstay (mm)Shorter = snappier	425	425	425	425	430	430	430
BB drop (mm)More = lower centre of gravity	75	75	75	73	73	70	70
BB height (mm)Pedal clearance in corners	261	261	261	263	263	266	266
Front centre (mm)Room for your toes	589	592	600	612	624	638	657

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

Between race and comfort. A good fit for sportives, club rides and fast days out.

Size 54 is more upright than 78% of the 218 road frames we track.

The closest road frames from other ranges, against size 54 here.

Bikes with a similar fit, compared with size 54 of this bike
Bike	Size	Stack	Reach
MMR Grand Tour 102026Stack −1 mm, reach −1 mm	M	−1 mm	−1 mm
Bianchi Infinito Ultegra DI22026Stack −1 mm, reach same	55	−1 mm	same
Trek Domane AL 2 Gen 42026Stack +5 mm, reach −7 mm	54	+5 mm	−7 mm
Grind Grit2026Stack +1 mm, reach −3 mm	M	+1 mm	−3 mm
Basso Venta R2026Stack +1 mm, reach same	53	+1 mm	same
Kross ALTA 2.02026Stack +2 mm, reach −8 mm	M	+2 mm	−8 mm

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

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