2021 Pilot Cycles Scram Base

	51	54	57	60
Stack	563mm	585mm	603mm	630mm
Reach	344mm	365mm	384mm	404mm
Stack to Reach Ratio	1.64:1	1.6:1	1.57:1	1.56:1
Seat Tube Length, C-T	510mm	540mm	570mm	590mm
Top Tube Length, Effective/Horizontal HT Top	512mm	538mm	569mm	597mm
Top Tube Slope	8.5deg	7.4deg	6deg	6.5deg
Head Tube Angle	71deg	71deg	71deg	71deg
Seat Tube Angle	74deg	73.5deg	73deg	73deg
Head Tube Length	125mm	150mm	170mm	200mm
Bottom Bracket Drop	72mm	71mm	70mm	69mm
Bottom Bracket Height	258mm	259mm	260mm	261mm
Chainstay Length	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	418.9mm	419mm	419.2mm	419.4mm
Front-Center	569.7mm	599.2mm	623.7mm	654.3mm
Front-Center Horizontal	565.1mm	595mm	619.8mm	650.6mm
Wheelbase	984mm	1014mm	1039mm	1070mm
Fork Offset/Rake	49.2mm	50.1mm	49.4mm	50.6mm
Trail	61.6mm mid/neutral	60.6mm mid/neutral	61.4mm mid/neutral	60.2mm mid/neutral
Mechanical Trail	58.2mm	57.3mm	58mm	56.9mm
Wheel Flop	19mm	18.7mm	18.9mm	18.5mm
Tire to Pedal Spindle	69.7mm 170 mm cranks	99.2mm 170 mm cranks	123.7mm 170 mm cranks	154.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	88mm 170 mm cranks	89mm 170 mm cranks	90mm 170 mm cranks	91mm 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.pilotcycles.com/frame-customize/scram/

Geometry