2018 Specialized Bicycles Amira Base

	44	48	51	54	56
Stack	504mm	516mm	529mm	548mm	565mm
Reach	365mm	371mm	378mm	378mm	380mm
Stack to Reach Ratio	1.38:1	1.39:1	1.4:1	1.45:1	1.49:1
Seat Tube Length, C-T	390mm	420mm	460mm	490mm	510mm
Top Tube Length, Effective/Horizontal Center	491mm	502mm	515mm	535mm	547mm
Top Tube Slope	15.3deg	12.9deg	9.6deg	8.5deg	8.2deg
Head Tube Angle	70.5deg	71.25deg	72deg	72deg	72deg
Seat Tube Angle	76deg	76deg	76deg	74deg	74deg
Head Tube Length	105mm	115mm	125mm	145mm	165mm
Bottom Bracket Drop	73mm	73mm	73mm	73mm	72mm
Bottom Bracket Height	262mm	262mm	262mm	262mm	263mm
Chainstay Length	405mm	405mm	405mm	405mm	408mm
Chainstay Length Horizontal	398.4mm	398.4mm	398.4mm	398.4mm	401.6mm
Front-Center	576.3mm	580.2mm	582.2mm	588.2mm	596.8mm
Front-Center Horizontal	571.6mm	575.6mm	577.6mm	583.6mm	592.4mm
Wheelbase	970mm	974mm	976mm	982mm	994mm
Fork Offset/Rake	54mm	54mm	49mm	49mm	49mm
Fork Length (Axle-To-Crown)	369mm	369mm	369mm	369mm	369mm
Trail	61.3mm mid/neutral	56.7mm mid/neutral	57.3mm mid/neutral	57.3mm mid/neutral	57.3mm mid/neutral
Mechanical Trail	57.8mm	53.7mm	54.5mm	54.5mm	54.5mm
Wheel Flop	19.3mm	17.3mm	16.9mm	16.9mm	16.9mm
Standover Height	692mm	718mm	735mm	758mm	777mm
Tire to Pedal Spindle	71.3mm 170 mm cranks	75.2mm 170 mm cranks	77.2mm 170 mm cranks	83.2mm 170 mm cranks	91.8mm 170 mm cranks
Pedal Spindle to Ground Clearance	92mm 170 mm cranks	92mm 170 mm cranks	92mm 170 mm cranks	92mm 170 mm cranks	93mm 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://www.specialized.com/us/en/shop/Bikes/Road-Bikes/Triathlon-Bikes/Amira/c/triathlonAmira

Geometry