2025 Xiamen Carbon Speed Gran Turismo Base

	500	520	540	560	580
Stack	531.5mm	548mm	562mm	582.4mm	600.3mm
Reach	362.5mm	368mm	374.5mm	380.2mm	384.1mm
Stack to Reach Ratio	1.47:1	1.49:1	1.5:1	1.53:1	1.56:1
Seat Tube Length, Unknown	480mm	500mm	517.5mm	540mm	560mm
Top Tube Length, Effective/Horizontal Unknown	519.9mm	530.3mm	546.3mm	558.3mm	570.5mm
Top Tube Slope	8.1deg	7.7deg	7.3deg	7deg	6.8deg
Head Tube Angle	72deg	72deg	72deg	72.5deg	72.5deg
Seat Tube Angle	73.5deg	73.5deg	73deg	73deg	72.75deg
Head Tube Length	122.8mm	138.8mm	154.2mm	173.9mm	197.9mm
Bottom Bracket Drop	72mm	71.9mm	71.9mm	72.1mm	66.7mm
Bottom Bracket Height	269mm	269.1mm	269.1mm	268.9mm	274.3mm
Chainstay Length	422mm	422mm	422mm	422mm	422mm
Chainstay Length Horizontal	415.8mm	415.8mm	415.8mm	415.8mm	416.7mm
Front-Center	565.8mm	576.6mm	587.4mm	594.8mm	605.2mm
Front-Center Horizontal	561.2mm	572.1mm	583mm	590.4mm	601.5mm
Wheelbase	977mm	987.9mm	998.8mm	1006.2mm	1018.2mm
Fork Offset/Rake	47mm	47mm	47mm	47mm	47mm
Fork Length, Unknown	375mm	375mm	375mm	375mm	375mm
Trail	61.4mm mid/neutral	61.4mm mid/neutral	61.4mm mid/neutral	58.2mm mid/neutral	58.2mm mid/neutral
Mechanical Trail	58.4mm	58.4mm	58.4mm	55.5mm	55.5mm
Wheel Flop	18mm	18mm	18mm	16.7mm	16.7mm
Tire to Pedal Spindle	54.8mm 170 mm cranks	65.6mm 170 mm cranks	76.4mm 170 mm cranks	83.8mm 170 mm cranks	94.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	99mm 170 mm cranks	99.1mm 170 mm cranks	99.1mm 170 mm cranks	98.9mm 170 mm cranks	104.3mm 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.xmcarbonspeed.cc/products/xmcs-gran-turismo-frameset

Geometry