2018 Specialized Bicycles Tarmac Expert

	49	52	54	56	58	61	64
Stack	504mm	526mm	543mm	564mm	591mm	612mm	636mm
Reach	386mm	386mm	387mm	395mm	402mm	408mm	415mm
Stack to Reach Ratio	1.31:1	1.36:1	1.4:1	1.43:1	1.47:1	1.5:1	1.53:1
Seat Tube Length, C-T	431mm	462mm	481mm	501mm	522mm	553mm	584mm
Top Tube Length, Effective/Horizontal Center	518mm	537mm	548mm	565mm	582mm	600mm	621mm
Top Tube Slope	10deg	9.1deg	8.9deg	8.9deg	9.4deg	8.4deg	7.6deg
Head Tube Angle	72.25deg	73deg	73deg	73.5deg	73.5deg	74deg	74deg
Seat Tube Angle	75.5deg	74deg	73.5deg	73.25deg	73deg	72.5deg	72.5deg
Head Tube Length	100mm	120mm	140mm	160mm	190mm	210mm	235mm
Bottom Bracket Drop	71.5mm	71.5mm	69mm	69mm	67.5mm	67.5mm	67.5mm
Bottom Bracket Height	263.5mm	263.5mm	266mm	266mm	267.5mm	267.5mm	267.5mm
Chainstay Length	405mm	405mm	405mm	405mm	407mm	410mm	410mm
Chainstay Length Horizontal	398.6mm	398.6mm	399.1mm	399.1mm	401.4mm	404.4mm	404.4mm
Front-Center	576mm	576mm	583mm	591mm	605mm	612mm	645mm
Front-Center Horizontal	571.4mm	571.4mm	578.9mm	586.9mm	601.6mm	608.6mm	611.6mm
Wheelbase	970mm	970mm	978mm	986mm	1003mm	1013mm	1016mm
Fork Offset/Rake	45mm	45mm	45mm	43mm	43mm	43mm	43mm
Fork Length, Unknown	368mm	368mm	368mm	368mm	368mm	368mm	368mm
Trail	60mm mid/neutral	55.4mm mid/neutral	55.4mm mid/neutral	54.4mm mid/neutral	54.4mm mid/neutral	51.3mm mid/neutral	51.3mm mid/neutral
Mechanical Trail	57.1mm	52.9mm	52.9mm	52.2mm	52.2mm	49.3mm	49.3mm
Wheel Flop	17.4mm	15.5mm	15.5mm	14.8mm	14.8mm	13.6mm	13.6mm
Standover Height	730mm	755mm	775mm	795mm	826mm	850mm	850mm
Tire to Pedal Spindle	71mm 170 mm cranks	71mm 170 mm cranks	75.5mm 172.5 mm cranks	83.5mm 172.5 mm cranks	95mm 175 mm cranks	102mm 175 mm cranks	135mm 175 mm cranks
Pedal Spindle to Ground Clearance	93.5mm 170 mm cranks	93.5mm 170 mm cranks	93.5mm 172.5 mm cranks	93.5mm 172.5 mm cranks	92.5mm 175 mm cranks	92.5mm 175 mm cranks	92.5mm 175 mm cranks

	49	52	54	56	58	61	64
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
Tire Width	24mm	24mm	24mm	24mm	24mm	24mm	24mm
Tire Outer Diameter	670mm	670mm	670mm	670mm	670mm	670mm	670mm
Bike Length with Tires	1640mm	1640mm	1648mm	1656mm	1673mm	1683mm	1686mm
Crank Length	170mm	170mm	172.5mm	172.5mm	175mm	175mm	175mm
Handlebar Width	400mm	420mm	420mm	420mm	440mm	440mm	440mm
Stem Length	70mm	80mm	90mm	100mm	100mm	110mm	120mm

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

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Performance Road

Source:Specialized

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2018 Specialized Bicycles Tarmac Expert

Geometry

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Stack and Reach vs. Category Trend