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Sentinel

2018 Transition Bikes Sentinel GX

Category
Full-suspension All-mountain/Enduro MTB
Design
Flat Bar, Full suspension
Frame
Aluminum
Fork
Aluminum
Suspension
160mm fork travel, 30% sag
Features
Disc brake
SM
Compare
Collection
I've Ridden
MD
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Collection
I've Ridden
LG
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Collection
I've Ridden
XL
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Collection
I've Ridden
Somewhat upright stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

SM
MD
LG
XL
Stack
617mm
617mm
626mm
635mm
Reach
425mm
450mm
475mm
500mm
Stack to Reach Ratio
1.45:1
1.37:1
1.32:1
1.27:1
Seat Tube Length, Unknown
360mm
400mm
440mm
490mm
Top Tube Length, Effective/Horizontal Unknown
568mm
593mm
622mm
650mm
Head Tube Angle
64deg
64deg
64deg
64deg
Effective Seat Tube Angle, Unknown
77.5deg
76.8deg
76.3deg
75.8deg
Head Tube Length
100mm
100mm
110mm
120mm
Bottom Bracket Drop
30mm
30mm
30mm
30mm
Bottom Bracket Height
339.4mm
339.4mm
339.4mm
339.4mm
Chainstay Length
435mm
435mm
435mm
435mm
Chainstay Length Horizontal
434mm
434mm
434mm
434mm
Front-Center
759.6mm
784.6mm
813.6mm
843.6mm
Front-Center Horizontal
759mm
784mm
813mm
843mm
Wheelbase
1193mm
1218mm
1247mm
1277mm
Fork Offset/Rake
43mm
43mm
43mm
43mm
Fork Length (Axle-To-Crown)
571mm
571mm
571mm
571mm
Trail
132.3mm
very high
132.3mm
very high
132.3mm
very high
132.3mm
very high
Mechanical Trail
118.9mm
118.9mm
118.9mm
118.9mm
Wheel Flop
52.1mm
52.1mm
52.1mm
52.1mm
Standover Height
685mm
695mm
700mm
715mm
Tire to Pedal Spindle
220.2mm
170 mm cranks
245.2mm
170 mm cranks
274.2mm
170 mm cranks
304.2mm
170 mm cranks
Pedal Spindle to Ground Clearance
169.4mm
170 mm cranks
169.4mm
170 mm cranks
169.4mm
170 mm cranks
169.4mm
170 mm cranks

GX Build

SM
MD
LG
XL
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
Tire Width
2.3in
2.3in
2.3in
2.3in
Tire Width Max
2.5in
2.5in
2.5in
2.5in
Tire Outer Diameter
738.8mm
738.8mm
738.8mm
738.8mm
Bike Length with Tires
1931.8mm
1956.8mm
1985.8mm
2015.8mm
Crank Length
170mm
170mm
170mm
170mm
Handlebar Width
780mm
780mm
780mm
780mm
Stem Length
40mm
40mm
40mm
40mm

Published Sizing Recommendations

Height
5 ft 1 in
to
5 ft 7 in
5 ft 3 in
to
5 ft 11 in
5 ft 10 in
to
6 ft 3 in
6 ft 1 in
to
6 ft 9 in

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
Category Trend
Full-suspension All-mountain/Enduro MTB
Source:https://www.transitionbikes.com/SupportFiles/SentinelAlloy_2018_WebsiteArchive.pdf
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