2026 Grind Cycles ARC Aero Race Concept

	XXS (45)	XS (49)	S (52)	M (54)	L (56)	XL (58)
Stack	500mm	503mm	523mm	542mm	565mm	587mm
Reach	365mm	370mm	376mm	384mm	392mm	401mm
Stack to Reach Ratio	1.37:1	1.36:1	1.39:1	1.41:1	1.44:1	1.46:1
Seat Tube Length, Unknown	405mm	425mm	465mm	495mm	525mm	545mm
Top Tube Length, Effective/Horizontal Unknown	499mm	510mm	526mm	540mm	559mm	575mm
Top Tube Slope	13deg	10.9deg	8.6deg	7.3deg	6.5deg	6.6deg
Head Tube Angle	70.5deg	71deg	71.5deg	72.5deg	73deg	73.5deg
Seat Tube Angle	75deg	74.5deg	74deg	74deg	73.5deg	73.5deg
Head Tube Length	100mm	102mm	120mm	137mm	159mm	181mm
Bottom Bracket Drop	72mm	72mm	72mm	72mm	72mm	72mm
Bottom Bracket Height	269mm	269mm	269mm	269mm	269mm	269mm
Chainstay Length	405mm	405mm	405mm	405mm	405mm	405mm
Chainstay Length Horizontal	398.6mm	398.6mm	398.6mm	398.6mm	398.6mm	398.6mm
Front-Center	572mm	574mm	582mm	587mm	598mm	610mm
Front-Center Horizontal	567.5mm	569.5mm	577.5mm	582.5mm	592.5mm	605.5mm
Wheelbase	966mm	968mm	976mm	981mm	991mm	1004mm
Fork Offset/Rake	48mm	48mm	48mm	48mm	48mm	48mm
Fork Length, Unknown	370mm	370mm	370mm	370mm	370mm	370mm
Trail	69.8mm high	66.7mm high	63.5mm mid/neutral	57.2mm mid/neutral	54.1mm mid/neutral	51mm mid/neutral
Mechanical Trail	65.8mm	63mm	60.2mm	54.5mm	51.7mm	48.9mm
Wheel Flop	22mm	20.5mm	19.1mm	16.4mm	15.1mm	13.9mm
Standover Height	740mm	760mm	773mm	793mm	810mm	830mm
Tire to Pedal Spindle	71mm 160 mm cranks	68mm 165 mm cranks	76mm 165 mm cranks	76mm 170 mm cranks	87mm 170 mm cranks	96.5mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	109mm 160 mm cranks	104mm 165 mm cranks	104mm 165 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	96.5mm 172.5 mm cranks

	XXS (45)	XS (49)	S (52)	M (54)	L (56)	XL (58)
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	30mm	30mm	30mm	30mm	30mm	30mm
Tire Width Max	32mm	32mm	32mm	32mm	32mm	32mm
Tire Outer Diameter	682mm	682mm	682mm	682mm	682mm	682mm
Bike Length with Tires	1648mm	1650mm	1658mm	1663mm	1673mm	1686mm
Crank Length	160mm	165mm	165mm	170mm	170mm	172.5mm
Handlebar Width	380mm	380mm	380mm	400mm	400mm	420mm
Stem Length	80mm	90mm	90mm	100mm	110mm	120mm
Stem Angle	-6deg	-6deg	-6deg	-6deg	-6deg	-6deg

Very Upright

Somewhat Upright

Average

Somewhat Aggressive

Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Category Trend

Source:https://grindcycles.com/

Geometry