2018 B'TWIN Ultra 900 AF

	XS	S	M	L	XL
Stack	524.9mm	542.7mm	570.1mm	598.7mm	627.4mm
Reach	358.7mm	369.3mm	379.1mm	386.5mm	388.1mm
Stack to Reach Ratio	1.46:1	1.47:1	1.5:1	1.55:1	1.62:1
Seat Tube Length, C-T	490mm	520mm	550mm	580mm	600mm
Top Tube Length, Effective/Horizontal HT Top	510mm	530mm	548mm	564mm	580mm
Head Tube Angle	71deg	72deg	73deg	73deg	73deg
Seat Tube Angle	74deg	74deg	73.5deg	73.5deg	73.5deg
Head Tube Length	107.5mm	122.5mm	147.5mm	177.5mm	207.5mm
Bottom Bracket Drop	67mm	67mm	67mm	67mm	67mm
Bottom Bracket Height	269mm	269mm	269mm	269mm	269mm
Chainstay Length	410mm	410mm	410mm	410mm	410mm
Chainstay Length Horizontal	404.5mm	404.5mm	404.5mm	404.5mm	404.5mm
Front-Center	567.9mm	575.1mm	583.1mm	599.9mm	610.3mm
Front-Center Horizontal	563.9mm	571.2mm	579.9mm	596.1mm	606.5mm
Wheelbase	968.4mm	975.7mm	984.4mm	1000.6mm	1011mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	375mm	375mm	375mm	375mm	375mm
Trail	68.1mm high	61.9mm mid/neutral	55.7mm mid/neutral	55.7mm mid/neutral	55.7mm mid/neutral
Mechanical Trail	64.4mm	58.8mm	53.2mm	53.2mm	53.2mm
Wheel Flop	21mm	18.2mm	15.6mm	15.6mm	15.6mm
Tire to Pedal Spindle	61.9mm 170 mm cranks	69.1mm 170 mm cranks	77.1mm 170 mm cranks	93.9mm 170 mm cranks	104.3mm 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

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://findabikelive.blob.core.windows.net/bikes/btwin-ultra-700-af-road-bike-greygreen-ultra-700-af-road-bike-greygreen-2017_2-large.jpg

Geometry