2019 Miracle Bike GR028/GR029 Base

	52cm	54cm	56cm	58cm
Stack	540mm	554mm	570mm	582mm
Reach	355mm	366mm	381mm	392mm
Stack to Reach Ratio	1.52:1	1.51:1	1.5:1	1.48:1
Seat Tube Length, C-T	500mm	520mm	540mm	560mm
Top Tube Length, Effective/Horizontal Center	515mm	535mm	555.5mm	575mm
Top Tube Slope	7deg	6.2deg	5.7deg	4.8deg
Head Tube Angle	70.5deg	71deg	71.5deg	72deg
Seat Tube Angle	73.5deg	73.5deg	73deg	73deg
Head Tube Length	120mm	130mm	145mm	160mm
Bottom Bracket Drop	65mm	65mm	65mm	65mm
Bottom Bracket Height	271mm	271mm	271mm	271mm
Chainstay Length	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	420mm	420mm	420mm	420mm
Front-Center	580mm	586mm	601mm	620mm
Front-Center Horizontal	576mm	582mm	597mm	619mm
Wheelbase	996mm	1002mm	1017mm	1039mm
Fork Offset/Rake	45mm	45mm	45mm	45mm
Fork Length, Unknown	396mm	396mm	396mm	396mm
Trail	71.3mm high	68.1mm high	65mm mid/neutral	61.9mm mid/neutral
Mechanical Trail	67.2mm	64.4mm	61.6mm	58.8mm
Wheel Flop	22.4mm	21mm	19.6mm	18.2mm
Tire to Pedal Spindle	74mm 170 mm cranks	80mm 170 mm cranks	95mm 170 mm cranks	114mm 170 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks	101mm 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:http://miraclebikes.com/Product/detail/id/37.html

Geometry