2018 Transition Bikes Throttle Base

	SM	MD	LG	XL
Stack	603mm	612mm	621mm	630mm
Reach	390mm	420mm	450mm	480mm
Stack to Reach Ratio	1.55:1	1.46:1	1.38:1	1.31:1
Seat Tube Length, C-T	385mm	410mm	450mm	495mm
Top Tube Length, Effective/Horizontal HT Top	563mm	596mm	628mm	661mm
Head Tube Angle	66deg	66deg	66deg	66deg
Effective Seat Tube Angle, ETT HT Top	74deg	74deg	74deg	74deg
Head Tube Length	100mm	110mm	120mm	130mm
Bottom Bracket Drop	40mm	40mm	40mm	40mm
Bottom Bracket Height	310.4mm	310.4mm	310.4mm	310.4mm
Chainstay Length	420mm	420mm	420mm	420mm
Chainstay Length Horizontal	418.1mm	418.1mm	418.1mm	418.1mm
Front-Center	688.1mm	722mm	756mm	789.9mm
Front-Center Horizontal	686.9mm	720.9mm	754.9mm	788.9mm
Wheelbase	1105mm	1139mm	1173mm	1207mm
Fork Offset/Rake	42mm	42mm	42mm	42mm
Fork Length (Axle-To-Crown)	532mm	532mm	532mm	532mm
Trail	110mm very high	110mm very high	110mm very high	110mm very high
Mechanical Trail	100.5mm	100.5mm	100.5mm	100.5mm
Wheel Flop	40.9mm	40.9mm	40.9mm	40.9mm
Standover Height	658mm	677mm	682mm	693mm
Tire to Pedal Spindle	167.7mm 170 mm cranks	201.6mm 170 mm cranks	235.6mm 170 mm cranks	269.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	140.4mm 170 mm cranks	140.4mm 170 mm cranks	140.4mm 170 mm cranks	140.4mm 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.transitionbikes.com/PDF/WebpageArchive_2018_Throttle.pdf

Geometry