Compare: 2026 Trek Bikes Checkpoint AL3 XS vs 2026 XMCS Aero Gravel Base S

Insights

Somewhat aggressive stack and reach vs trend of all-road/gravel bikes

Design deviates from other sizes of Trek Bikes Checkpoint

Average stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of XMCS Aero Gravel

Stack	545mm	548mm +3mm
Reach	380mm	386mm +6mm
Stack to Reach Ratio	1.43:1	1.42:1
Seat Tube Length, C-T	490mm	—
Seat Tube Length, Unknown	—	455mm
Top Tube Length, Effective/Horizontal Center	536mm	—
Top Tube Length, Effective/Horizontal Unknown	—	533mm
Top Tube Slope	8.2deg	12.2deg +4deg
Head Tube Angle	71.2deg	71deg -0.2deg
Seat Tube Angle	74.1deg	75deg +0.9deg
Head Tube Length	96mm	114mm +18mm
Bottom Bracket Drop	78mm	80mm +2mm
Bottom Bracket Height	275mm	288mm +13mm
Chainstay Length	435mm	425mm -10mm
Chainstay Length Horizontal	428mm	417.4mm -10.6mm
Front-Center	602.1mm	611mm +8.9mm
Front-Center Horizontal	597.1mm	605.6mm +8.5mm
Wheelbase	1025mm	1023mm -2mm
Fork Offset/Rake	49mm	55mm +6mm
Fork Length, Unknown	—	400mm
Trail	68.4mm high	68.5mm +0.1mm high
Mechanical Trail	64.8mm	64.8mm +0mm
Wheel Flop	20.9mm	21.1mm +0.2mm
Standover Height	735mm	—
Tire to Pedal Spindle	79.1mm 170 mm cranks	73mm -6.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	105mm 170 mm cranks	118mm +13mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	42mm	57mm +15mm
Tire Outer Diameter	706mm	736mm +30mm
Bike Length with Tires	1731mm	1759mm +28mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Aluminum	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc

Actions	Collection I've Ridden	Collection I've Ridden
Source	n/a	https://chinertown.com/index.php/topic,6967.75.html
Brand	Trek Bikes	XMCS
Bike	2026 Checkpoint AL3	2026 Aero Gravel Base
Size	XS	S
Category	All-road/Gravel	Progressive Gravel