2025 Zinn Cycles Tui Base

	XXS	XS	S	M
Stack	524mm	514mm	569mm	597mm
Reach	324mm	336mm	356mm	369mm
Stack to Reach Ratio	1.62:1	1.53:1	1.6:1	1.62:1
Seat Tube Length, C-T	360mm	410mm	460mm	500mm
Top Tube Length, Effective/Horizontal HT Top	475mm	490mm	525mm	545mm
Top Tube Slope	22.8deg	15deg	14.7deg	13deg
Head Tube Angle	71deg	71deg	72deg	72deg
Seat Tube Angle	74deg	73.5deg	73.5deg	73.5deg
Head Tube Length	95mm	95mm	170mm	160mm
Bottom Bracket Drop	90mm	81mm	61mm	73mm
Bottom Bracket Height	247mm	256mm	276mm	269mm
Chainstay Length	430mm	430mm	430mm	460mm
Chainstay Length Horizontal	420.5mm	422.3mm	425.7mm	454.2mm
Front-Center	533.2mm	544.8mm	576.6mm	591.4mm
Front-Center Horizontal	525.5mm	538.7mm	573.4mm	586.8mm
Wheelbase	946mm	961mm	999mm	1041mm
Fork Offset/Rake	50mm	50mm	50mm	47mm
Fork Length (Axle-To-Crown)	370mm	370mm	370mm	395mm
Trail	63.2mm mid/neutral	63.2mm mid/neutral	56.9mm mid/neutral	61.7mm mid/neutral
Mechanical Trail	59.7mm	59.7mm	54.1mm	58.7mm
Wheel Flop	19.4mm	19.4mm	16.7mm	18.1mm
Standover Height	658mm	685mm	737mm	782mm
Tire to Pedal Spindle	46.2mm 150 mm cranks	52.8mm 155 mm cranks	74.6mm 165 mm cranks	76.9mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	97mm 150 mm cranks	101mm 155 mm cranks	111mm 165 mm cranks	96.5mm 172.5 mm cranks

Published Sizing Recommendations

Height

4 ft 9 in

4 ft 11 in

5 ft 3 in

5 ft 6 in

5 ft 10 in

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.bigandtallbike.com/tui-gravel-road-bike-titanium-gravel-road-touring.html?id=99814453&quantity=1