2021 v.3 Disc Soma Fabrications Grand Randonneur Base

	46	49	52	55	58	61	65
Stack	523mm	538mm	552mm	571mm	592mm	612mm	650mm
Reach	377mm	380mm	387mm	391mm	395mm	399mm	406mm
Stack to Reach Ratio	1.39:1	1.42:1	1.43:1	1.46:1	1.5:1	1.53:1	1.6:1
Seat Tube Length, C-T	460mm	490mm	520mm	550mm	580mm	610mm	650mm
Top Tube Length, Effective/Horizontal Center	518mm	530mm	545mm	560mm	577mm	591mm	610mm
Top Tube Slope	9.1deg	7.3deg	5.6deg	4.6deg	3.8deg	3deg	2.9deg
Head Tube Angle	72.5deg	72.5deg	72.5deg	72.5deg	73deg	73deg	73deg
Seat Tube Angle	74.5deg	74.5deg	74deg	73.5deg	73deg	72.5deg	72.5deg
Head Tube Length	115mm	130mm	145mm	165mm	185mm	205mm	245mm
Bottom Bracket Drop	65mm	65mm	65mm	65mm	65mm	65mm	65mm
Bottom Bracket Height	269mm	269mm	269mm	269mm	269mm	269mm	269mm
Chainstay Length	430mm	430mm	430mm	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	425.1mm	425.1mm	425.1mm	425.1mm	425.1mm	425.1mm	425.1mm
Front-Center	593mm	601mm	612mm	622mm	628mm	637mm	656mm
Front-Center Horizontal	588.9mm	597.9mm	608.9mm	617.9mm	624.9mm	633.9mm	652.9mm
Wheelbase	1014mm	1023mm	1034mm	1043mm	1050mm	1059mm	1078mm
Fork Offset/Rake	65mm	65mm	65mm	65mm	65mm	65mm	65mm
Trail	37.2mm low	37.2mm low	37.2mm low	37.2mm low	34.1mm low	34.1mm low	34.1mm low
Mechanical Trail	35.4mm	35.4mm	35.4mm	35.4mm	32.7mm	32.7mm	32.7mm
Wheel Flop	10.7mm	10.7mm	10.7mm	10.7mm	9.6mm	9.6mm	9.6mm
Standover Height	734.1mm	751.8mm	767.1mm	789.9mm	817.9mm	844.6mm	881.4mm
Tire to Pedal Spindle	89mm 170 mm cranks	97mm 170 mm cranks	108mm 170 mm cranks	118mm 170 mm cranks	124mm 170 mm cranks	133mm 170 mm cranks	152mm 170 mm cranks
Pedal Spindle to Ground Clearance	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks

	46	49	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	650B/27.5 in 584 mm BSD
Tire Width	42mm	42mm	42mm	42mm	42mm	42mm	42mm
Tire Width Max	47mm	47mm	47mm	47mm	47mm	47mm	47mm
Tire Outer Diameter	668mm	668mm	668mm	668mm	668mm	668mm	668mm
Bike Length with Tires	1682mm	1691mm	1702mm	1711mm	1718mm	1727mm	1746mm

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.

Learn more about the Upright/Aggressive Scale

Category Trend

Low-trail

Source:https://www.somafab.com/archives/product/grand-randonneur-frame-set

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2021 v.3 Disc Soma Fabrications Grand Randonneur Base

Geometry

Base Build

Stack and Reach vs. Category Trend