2025 RONDO IOON Base

Somewhat upright stack and reachvs category

Average stack and reachvs category

Somewhat aggressive stack and reachvs category

Very aggressive stack and reachvs category

Somewhat aggressive stack and reachvs category

Very aggressive stack and reachvs category

Somewhat aggressive stack and reachvs category

Very aggressive stack and reachvs category

	XS - Lo Axle	XS - Hi Axle	S - Lo Axle	S - Hi Axle	M - Lo Axle	M - Hi Axle	L - Lo Axle	L - Hi Axle	XL - Lo Axle	XL - Hi Axle
Stack	536mm	531mm	550mm	545mm	571mm	565mm	599mm	594mm	623mm	618mm
Reach	358mm	365mm	380mm	387mm	395mm	402mm	410mm	417mm	420mm	427mm
Stack to Reach Ratio	1.5:1	1.45:1	1.45:1	1.41:1	1.45:1	1.41:1	1.46:1	1.42:1	1.48:1	1.45:1
Seat Tube Length, C-T	435mm	435mm	455mm	455mm	485mm	485mm	510mm	510mm	535mm	535mm
Top Tube Length, Effective/Horizontal HT Top	523mm	521mm	548mm	547mm	570mm	568mm	593mm	592mm	611mm	609mm
Top Tube Slope	13.9deg	13.1deg	12.6deg	11.9deg	11.3deg	10.5deg	11.3deg	10.6deg	10.9deg	10.3deg
Head Tube Angle	70.5deg	71.2deg	70.5deg	71.2deg	71deg	71.7deg	71deg	71.7deg	71deg	71.7deg
Seat Tube Angle	73deg	73.7deg	73deg	73.7deg	73deg	73.7deg	73deg	73.7deg	73deg	73.7deg
Head Tube Length	115mm	115mm	125mm	125mm	145mm	145mm	175mm	175mm	200mm	200mm
Bottom Bracket Drop	65mm	70mm	70mm	75mm	70mm	75mm	70mm	75mm	70mm	75mm
Bottom Bracket Height	291mm	286mm	286mm	281mm	286mm	281mm	286mm	281mm	286mm	281mm
Chainstay Length	420mm	420mm	420mm	420mm	420mm	420mm	420mm	420mm	420mm	420mm
Chainstay Length Horizontal	414.9mm	414.1mm	414.1mm	413.3mm	414.1mm	413.3mm	414.1mm	413.3mm	414.1mm	413.3mm
Front-Center	577mm	584mm	601mm	609mm	619mm	626mm	644mm	651mm	662mm	669mm
Front-Center Horizontal	573.3mm	579.8mm	596.9mm	604.4mm	615mm	621.5mm	640.2mm	646.7mm	658.3mm	664.8mm
Wheelbase	988.3mm	993.9mm	1011mm	1017.6mm	1029.2mm	1034.7mm	1054.3mm	1059.9mm	1072.4mm	1078mm
Fork Offset/Rake	45mm	55mm	45mm	55mm	45mm	55mm	45mm	55mm	45mm	55mm
Fork Length (Axle-To-Crown)	400mm	390mm	400mm	390mm	400mm	390mm	400mm	390mm	400mm	390mm
Trail	78.3mm high	63.1mm mid/neutral	78.3mm high	63.1mm mid/neutral	75mm high	59.8mm mid/neutral	75mm high	59.8mm mid/neutral	75mm high	59.8mm mid/neutral
Mechanical Trail	73.8mm	59.7mm	73.8mm	59.7mm	70.9mm	56.8mm	70.9mm	56.8mm	70.9mm	56.8mm
Wheel Flop	24.7mm	19.3mm	24.7mm	19.3mm	23.1mm	17.8mm	23.1mm	17.8mm	23.1mm	17.8mm
Tire to Pedal Spindle	51mm 170 mm cranks	58mm 170 mm cranks	75mm 170 mm cranks	83mm 170 mm cranks	93mm 170 mm cranks	100mm 170 mm cranks	118mm 170 mm cranks	125mm 170 mm cranks	136mm 170 mm cranks	143mm 170 mm cranks
Pedal Spindle to Ground Clearance	121mm 170 mm cranks	116mm 170 mm cranks	116mm 170 mm cranks	111mm 170 mm cranks	116mm 170 mm cranks	111mm 170 mm cranks	116mm 170 mm cranks	111mm 170 mm cranks	116mm 170 mm cranks	111mm 170 mm cranks

	XS - Lo Axle	XS - Hi Axle	S - Lo Axle	S - Hi Axle	M - Lo Axle	M - Hi Axle	L - Lo Axle	L - Hi Axle	XL - Lo Axle	XL - Hi Axle
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	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	45mm	45mm	45mm	45mm	45mm	45mm	45mm	45mm	45mm	45mm
Tire Outer Diameter	712mm	712mm	712mm	712mm	712mm	712mm	712mm	712mm	712mm	712mm
Bike Length with Tires	1700.3mm	1705.9mm	1723mm	1729.6mm	1741.2mm	1746.7mm	1766.3mm	1771.9mm	1784.4mm	1790mm

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

All-road/Gravel

Source:Rondo

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2025 RONDO IOON Base

Geometry

Base Build

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