2025 Bossi Bicycles Summit MY25

	50	52	54	56	58	60
Stack	530mm	551.5mm	572mm	591mm	608mm	625mm
Reach	368mm	372mm	375.5mm	381mm	388mm	395mm
Stack to Reach Ratio	1.44:1	1.48:1	1.52:1	1.55:1	1.57:1	1.58:1
Seat Tube Length, Unknown	425mm	445mm	470mm	490mm	510mm	530mm
Top Tube Length, Effective/Horizontal HT Top	515mm	530mm	545mm	556mm	580mm	598mm
Top Tube Slope	14deg	14deg	13.4deg	13.1deg	12.7deg	12.2deg
Head Tube Angle	71deg	71.5deg	72deg	72.5deg	72.5deg	73deg
Seat Tube Angle	74.5deg	74deg	73.5deg	73.5deg	72.5deg	72deg
Head Tube Length	115mm	135mm	157mm	175mm	195mm	210mm
Bottom Bracket Drop	78mm	78mm	76mm	76mm	74mm	74mm
Bottom Bracket Height	268mm	268mm	270mm	270mm	272mm	272mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	417.8mm	417.8mm	418.2mm	418.2mm	418.5mm	418.5mm
Front-Center	579mm	585mm	591mm	597.5mm	610mm	617mm
Front-Center Horizontal	573.2mm	579.7mm	585.9mm	592.9mm	606mm	612.5mm
Wheelbase	991mm	997.5mm	1004mm	1011mm	1024.5mm	1031mm
Fork Offset/Rake	47mm	47mm	47mm	47mm	47mm	47mm
Trail	69.4mm high	66.2mm high	63mm mid/neutral	59.8mm mid/neutral	59.8mm mid/neutral	56.6mm mid/neutral
Mechanical Trail	65.7mm	62.8mm	59.9mm	57mm	57mm	54.2mm
Wheel Flop	21.4mm	19.9mm	18.5mm	17.2mm	17.2mm	15.8mm
Tire to Pedal Spindle	63mm 170 mm cranks	69mm 170 mm cranks	75mm 170 mm cranks	81.5mm 170 mm cranks	94mm 170 mm cranks	101mm 170 mm cranks
Pedal Spindle to Ground Clearance	98mm 170 mm cranks	98mm 170 mm cranks	100mm 170 mm cranks	100mm 170 mm cranks	102mm 170 mm cranks	102mm 170 mm cranks

	50	52	54	56	58	60
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	35mm	35mm	35mm	35mm	35mm	35mm
Tire Width Max	40mm	40mm	40mm	40mm	40mm	40mm
Tire Outer Diameter	692mm	692mm	692mm	692mm	692mm	692mm
Bike Length with Tires	1683mm	1689.5mm	1696mm	1703mm	1716.5mm	1723mm

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://bossibicycles.com/collections/endurance/products/summit-titanium-endurance-bike-my25

Geometry