1997 Trek Bikes 850 Base

	13in	16.5in	18in	19.5in	21in	22.5in
Stack	494.8mm	492.8mm	492.6mm	511.5mm	549.2mm	584.9mm
Reach	387.4mm	402.2mm	414mm	417.3mm	416mm	409.5mm
Stack to Reach Ratio	1.28:1	1.23:1	1.19:1	1.23:1	1.32:1	1.43:1
Seat Tube Length, C-T	330.2mm	419.1mm	457.2mm	495.3mm	533.4mm	571.5mm
Top Tube Length, Effective/Horizontal HT Top	540mm	555mm	570mm	580mm	590mm	600mm
Head Tube Angle	70deg	70deg	70.5deg	70.5deg	70.5deg	70.5deg
Seat Tube Angle	73deg	73deg	72.5deg	72.5deg	72.5deg	72deg
Head Tube Length	85mm	85mm	85mm	105mm	145mm	185mm
Bottom Bracket Drop	41.8mm	39.8mm	37.8mm	37.8mm	37.8mm	35.8mm
Bottom Bracket Height	291mm	293mm	295mm	295mm	295mm	297mm
Chainstay Length	430mm	430mm	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	428mm	428.2mm	428.3mm	428.3mm	428.3mm	428.5mm
Front-Center	599.5mm	614.1mm	621.8mm	631.8mm	643.8mm	650.5mm
Front-Center Horizontal	598mm	612.9mm	620.7mm	630.7mm	642.7mm	649.5mm
Wheelbase	1026mm	1041mm	1049mm	1059mm	1071mm	1078mm
Fork Offset/Rake	43mm	43mm	43mm	43mm	43mm	43mm
Fork Length (Axle-To-Crown)	395mm	395mm	395mm	395mm	395mm	395mm
Trail	75.4mm high	75.4mm high	72.3mm high	72.3mm high	72.3mm high	72.3mm high
Mechanical Trail	70.8mm	70.8mm	68.1mm	68.1mm	68.1mm	68.1mm
Wheel Flop	24.2mm	24.2mm	22.7mm	22.7mm	22.7mm	22.7mm
Standover Height	694mm	719mm	738mm	767mm	804mm	841mm
Tire to Pedal Spindle	96.7mm 170 mm cranks	111.3mm 170 mm cranks	114mm 175 mm cranks	124mm 175 mm cranks	135.9mm 175 mm cranks	142.6mm 175 mm cranks
Pedal Spindle to Ground Clearance	121mm 170 mm cranks	123mm 170 mm cranks	120mm 175 mm cranks	120mm 175 mm cranks	120mm 175 mm cranks	122mm 175 mm cranks

	13in	16.5in	18in	19.5in	21in	22.5in
Wheel Size	26 in 559 mm BSD	26 in 559 mm BSD	26 in 559 mm BSD	26 in 559 mm BSD	26 in 559 mm BSD	26 in 559 mm BSD
Tire Width	2.1in	2.1in	2.1in	2.1in	2.1in	2.1in
Tire Width Max	2.35in	2.35in	2.35in	2.35in	2.35in	2.35in
Tire Outer Diameter	665.7mm	665.7mm	665.7mm	665.7mm	665.7mm	665.7mm
Bike Length with Tires	1691.7mm	1706.7mm	1714.7mm	1724.7mm	1736.7mm	1743.7mm
Crank Length	170mm	170mm	175mm	175mm	175mm	175mm
Handlebar Width	560mm	560mm	560mm	560mm	560mm	560mm
Stem Length	90mm	105mm	120mm	135mm	135mm	135mm

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:http://www.vintage-trek.com/Trek-Fisher-Klein-Lemond/1997trek.pdf

Geometry