2021 YT Industries Jeffsy Core 4 29

Design
Flat Bar, Full suspension
Frame
Carbon/Composite
Suspension
150mm fork travel, 150mm rear travel
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Geometry

S high
S low
M high
M low
L high
L low
XL high
XL low
XXL high
XXL low
Stack
618mm
618mm
622mm
622mm
627mm
627mm
636mm
636mm
640mm
640mm
Reach
430mm
430mm
450mm
450mm
470mm
470mm
490mm
490mm
510mm
510mm
Stack to Reach Ratio
1.44:1
1.44:1
1.38:1
1.38:1
1.33:1
1.33:1
1.3:1
1.3:1
1.25:1
1.25:1
Seat Tube Length, C-T
400mm
400mm
415mm
415mm
435mm
435mm
460mm
460mm
485mm
485mm
Top Tube Length, Effective/Horizontal HT Top
572mm
572mm
593mm
593mm
615mm
615mm
638mm
638mm
660mm
660mm
Top Tube Slope
23.8deg
23.7deg
21.9deg
21.8deg
19.7deg
19.7deg
17.6deg
17.6deg
15.2deg
15.1deg
Head Tube Angle
66.5deg
66deg
66.5deg
66deg
66.5deg
66deg
66.5deg
66deg
66.5deg
66deg
Seat Tube Angle
77.5deg
77deg
77.5deg
77deg
77.5deg
77deg
77.5deg
77deg
77.5deg
77deg
Head Tube Length
100mm
100mm
105mm
105mm
110mm
110mm
120mm
120mm
125mm
125mm
Bottom Bracket Drop
24mm
32mm
24mm
32mm
24mm
32mm
24mm
32mm
24mm
32mm
Bottom Bracket Height
348mm
340mm
348mm
340mm
348mm
340mm
348mm
340mm
348mm
340mm
Chainstay Length
435mm
435mm
435mm
435mm
435mm
435mm
440mm
440mm
440mm
440mm
Chainstay Length Horizontal
434.3mm
433.8mm
434.3mm
433.8mm
434.3mm
433.8mm
439.3mm
438.8mm
439.3mm
438.8mm
Front-Center
740.1mm
740.9mm
762mm
762.9mm
784mm
784.8mm
808mm
808.8mm
830mm
830.8mm
Front-Center Horizontal
739.7mm
740.2mm
761.7mm
762.2mm
783.7mm
784.2mm
807.7mm
808.2mm
829.7mm
830.2mm
Wheelbase
1174mm
1174mm
1196mm
1196mm
1218mm
1218mm
1247mm
1247mm
1269mm
1269mm
Fork Offset/Rake
47.1mm
45mm
47.4mm
45.2mm
47.2mm
45mm
47.3mm
45mm
47.5mm
45.2mm
Trail
110.4mm
very high
116.3mm
very high
110.1mm
very high
116.1mm
very high
110.3mm
very high
116.3mm
very high
110.2mm
very high
116.4mm
very high
109.9mm
very high
116.1mm
very high
Mechanical Trail
101.2mm
106.3mm
101mm
106.1mm
101.1mm
106.3mm
101mm
106.3mm
100.8mm
106.1mm
Wheel Flop
40.4mm
43.2mm
40.3mm
43.1mm
40.3mm
43.2mm
40.3mm
43.2mm
40.2mm
43.2mm
Standover Height
706mm
706mm
702mm
702mm
701mm
701mm
693mm
693mm
694mm
694mm
Tire to Pedal Spindle
198.1mm
170 mm cranks
198.9mm
170 mm cranks
220.1mm
170 mm cranks
220.9mm
170 mm cranks
242.1mm
170 mm cranks
242.9mm
170 mm cranks
266.1mm
170 mm cranks
266.8mm
170 mm cranks
288mm
170 mm cranks
288.8mm
170 mm cranks
Pedal Spindle to Ground Clearance
178mm
170 mm cranks
170mm
170 mm cranks
178mm
170 mm cranks
170mm
170 mm cranks
178mm
170 mm cranks
170mm
170 mm cranks
178mm
170 mm cranks
170mm
170 mm cranks
178mm
170 mm cranks
170mm
170 mm cranks

Core 4 29 Build

S high
S low
M high
M low
L high
L low
XL high
XL low
XXL high
XXL low
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
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
2.4in
2.4in
2.4in
2.4in
2.4in
2.4in
2.4in
2.4in
2.4in
2.4in
Tire Outer Diameter
743.9mm
743.9mm
743.9mm
743.9mm
743.9mm
743.9mm
743.9mm
743.9mm
743.9mm
743.9mm
Bike Length with Tires
1917.9mm
1917.9mm
1939.9mm
1939.9mm
1961.9mm
1961.9mm
1990.9mm
1990.9mm
2012.9mm
2012.9mm

Published Sizing Recommendations

Height
154 cm
to
1655 cm
154 cm
to
1655 cm
164 cm
to
175 cm
164 cm
to
175 cm
174 cm
to
184 cm
174 cm
to
184 cm
183 cm
to
193 cm
183 cm
to
193 cm
192 cm
to
202 cm
192 cm
to
202 cm

Stack and Reach vs. Category Trend

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
Source:https://us.yt-industries.com/detail/index/sArticle/374/sPreview/1?number=101369#tech2