2022 Radon Bikes Spire Disc 8-10

	48	51	54	57	60	63
Stack	503mm	520mm	540mm	559mm	579mm	597mm
Reach	376mm	377mm	378mm	382mm	391mm	400mm
Stack to Reach Ratio	1.34:1	1.38:1	1.43:1	1.46:1	1.48:1	1.49:1
Seat Tube Length, C-T	440mm	470mm	500mm	530mm	560mm	590mm
Top Tube Length, Effective/Horizontal HT Top	505mm	515mm	530mm	545mm	565mm	200mm
Top Tube Slope	9deg	7.5deg	6.5deg	5.4deg	4.4deg	3.3deg
Head Tube Angle	72deg	72deg	72.3deg	72.8deg	73deg	73.3deg
Seat Tube Angle	75.6deg	75.1deg	74.25deg	73.8deg	73.3deg	72.8deg
Head Tube Length	100mm	120mm	140mm	160mm	180mm	200mm
Bottom Bracket Drop	75mm	73mm	73mm	71mm	71mm	69mm
Bottom Bracket Height	264mm	266mm	266mm	268mm	268mm	270mm
Chainstay Length	408mm	408mm	408mm	408mm	408mm	408mm
Chainstay Length Horizontal	401.1mm	401.4mm	401.4mm	401.8mm	401.8mm	402.1mm
Front-Center	566.9mm	574.2mm	579.2mm	585.6mm	597.5mm	609.8mm
Front-Center Horizontal	562mm	569.6mm	574.6mm	581.2mm	593.2mm	605.9mm
Wheelbase	963mm	971mm	976mm	983mm	995mm	1008mm
Fork Offset/Rake	44.6mm	45mm	45.3mm	46mm	44.9mm	45.5mm
Trail	63.3mm mid/neutral	62.8mm mid/neutral	60.6mm mid/neutral	56.8mm mid/neutral	56.7mm mid/neutral	54.2mm mid/neutral
Mechanical Trail	60.2mm	59.7mm	57.8mm	54.2mm	54.3mm	52mm
Wheel Flop	18.6mm	18.5mm	17.6mm	16mm	15.9mm	14.9mm
Standover Height	703.2mm	971mm	749.4mm	773mm	796.8mm	823.5mm
Tire to Pedal Spindle	57.9mm 170 mm cranks	63mm 172.2 mm cranks	68mm 172.2 mm cranks	74.4mm 172.2 mm cranks	83.5mm 175 mm cranks	95.8mm 175 mm cranks
Pedal Spindle to Ground Clearance	94mm 170 mm cranks	93.8mm 172.2 mm cranks	93.8mm 172.2 mm cranks	95.8mm 172.2 mm cranks	93mm 175 mm cranks	95mm 175 mm cranks

	48	51	54	57	60	63
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
Tire Width	28mm	28mm	28mm	28mm	28mm	28mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1641mm	1649mm	1654mm	1661mm	1673mm	1686mm
Crank Length	170mm	172.2mm	172.2mm	172.2mm	175mm	175mm
Handlebar Width	400mm	400mm	420mm	420mm	440mm	460mm
Stem Length	90mm	100mm	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.

Category Trend

Source:https://www.radon-bikes.de/en/roadbike/carbon/spire-disc-carbon/spire-disc-80-2022/

Geometry