2025 Simplon Grid Core

	45/XS	49/S	53/M	57/L	62/XL
Stack	557mm	575mm	599mm	618mm	636mm
Reach	375mm	385mm	398mm	408mm	422mm
Stack to Reach Ratio	1.49:1	1.49:1	1.51:1	1.51:1	1.51:1
Seat Tube Length, C-T	430mm	465mm	500mm	535mm	570mm
Top Tube Length, Effective/Horizontal HT Top	535mm	550mm	570mm	585mm	605mm
Top Tube Slope	16.2deg	14deg	12.5deg	10.6deg	8.7deg
Head Tube Angle	70deg	70deg	70deg	70deg	70deg
Seat Tube Angle	74deg	74deg	74deg	74deg	74deg
Head Tube Length	115mm	135mm	160mm	180mm	200mm
Bottom Bracket Drop	75mm	75mm	75mm	75mm	75mm
Bottom Bracket Height	276mm	276mm	276mm	276mm	276mm
Chainstay Length Horizontal	430mm	430mm	430mm	435mm	435mm
Front-Center	599.7mm	616.6mm	637.4mm	654.3mm	675.2mm
Front-Center Horizontal	595mm	612mm	633mm	650mm	671mm
Wheelbase	1025mm	1042mm	1063mm	1085mm	1106mm
Fork Offset/Rake	48mm	48mm	48mm	48mm	48mm
Fork Length (Axle-To-Crown)	415mm	415mm	415mm	415mm	415mm
Trail	76.7mm high	76.7mm high	76.7mm high	76.7mm high	76.7mm high
Mechanical Trail	72.1mm	72.1mm	72.1mm	72.1mm	72.1mm
Wheel Flop	24.6mm	24.6mm	24.6mm	24.6mm	24.6mm
Standover Height	725mm	762mm	788mm	818mm	847mm
Tire to Pedal Spindle	78.7mm 170 mm cranks	95.6mm 170 mm cranks	116.4mm 170 mm cranks	133.3mm 170 mm cranks	154.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	106mm 170 mm cranks	106mm 170 mm cranks	106mm 170 mm cranks	106mm 170 mm cranks	106mm 170 mm cranks

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://www.simplon.com/en/Bikes/Gravel-Bikes/Grid_b_915055

Geometry