2013 v.1 Soma Fabrications Grand Randonneur Base

	49.5	52	55	58	61	65
Stack	514mm	523mm	549mm	570mm	599mm	637mm
Reach	385mm	393mm	397mm	401mm	402mm	409mm
Stack to Reach Ratio	1.34:1	1.33:1	1.38:1	1.42:1	1.49:1	1.56:1
Seat Tube Length, C-T	495mm	520mm	550mm	580mm	610mm	650mm
Top Tube Length, Effective/Horizontal Center	530mm	545mm	560mm	577mm	590mm	610mm
Top Tube Slope	4.1deg	2.5deg	2.2deg	1.5deg	1.7deg	1.6deg
Head Tube Angle	72deg	72deg	72.5deg	73deg	73deg	73deg
Seat Tube Angle	74.5deg	74deg	73.5deg	73deg	72.5deg	72.5deg
Head Tube Length	116mm	125mm	150mm	170mm	200mm	240mm
Bottom Bracket Drop	65mm	65mm	65mm	65mm	65mm	65mm
Bottom Bracket Height	259mm	259mm	259mm	259mm	259mm	259mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	420mm	420mm	420mm	420mm	420mm	420mm
Front-Center	607mm	618mm	625mm	631mm	641mm	659mm
Front-Center Horizontal	604mm	616mm	622mm	627mm	637mm	657mm
Wheelbase	1024mm	1036mm	1042mm	1047mm	1057mm	1077mm
Fork Offset/Rake	69mm	69mm	69mm	69mm	69mm	69mm
Trail	32.7mm low	32.7mm low	29.8mm very low	26.9mm very low	26.9mm very low	26.9mm very low
Mechanical Trail	31.1mm	31.1mm	28.4mm	25.7mm	25.7mm	25.7mm
Wheel Flop	9.6mm	9.6mm	8.6mm	7.5mm	7.5mm	7.5mm
Standover Height	703mm	746mm	766mm	788mm	816mm	854mm
Tire to Pedal Spindle	113mm 170 mm cranks	124mm 170 mm cranks	131mm 170 mm cranks	137mm 170 mm cranks	147mm 170 mm cranks	165mm 170 mm cranks
Pedal Spindle to Ground Clearance	89mm 170 mm cranks	89mm 170 mm cranks	89mm 170 mm cranks	89mm 170 mm cranks	89mm 170 mm cranks	89mm 170 mm cranks

	49.5	52	55	58	61	65
Wheel Size	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD
Tire Width	32mm	32mm	32mm	32mm	32mm	32mm
Tire Outer Diameter	648mm	648mm	648mm	648mm	648mm	648mm
Bike Length with Tires	1672mm	1684mm	1690mm	1695mm	1705mm	1725mm

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://somafab.blogspot.com/2013/06/soma-grand-randonneur-official-geometry.html

Geometry