Trek Checkpoint ALR Gen 3 (2026) – geometry

Name: Trek Checkpoint ALR Gen 3 (2026)
Brand: Trek

Trek · Gravel · 700c · tyres up to 50 mmManufacturer data · as of Oct 25, 2026Source

Cockpit: 20 mm spacers · 100 mm stem · -6°

SpacersStemAngle °

Saddle: same saddle height · 0 mm setback · centred (default)

Saddle heightSetbackForward (+)/back

Reach: Horizontal distance from the bottom bracket to the top of the head tube. More reach = more stretched-out position. · grid 10 cm

Measure	Checkpoint ALR Gen 3 (2026) M
Frame
Stackmm	589
Reachmm	391
Stack / Reach	1.51
Head angle°	71.8°
Seat angle°	73.2°
Head tubemm	140
Seat tubemm	505
Top tube (effective)mm	569
Chainstaymm	435
Rear centre (horizontal)mm	428
Wheelbasemm	1041
Front centremm	617
BB dropmm	76
BB heightmm	277
Fork offsetmm	50
Trailmm	63
Fork axle-to-crownmm	–
Cockpit & riding position
Bar reachmm	476
Bar stackmm	648
Saddle – barmm	684
Saddle-to-bar dropmm	41
Tyre clearancemm	50

italic = calculated · tap a row to pin the measure in the drawing · Δ relative to Checkpoint ALR Gen 3 (2026)

Geometry table Trek Checkpoint ALR Gen 3 (2026)

Gravel · 700c · Sizes XS–XL · Stack 545–650 mm · Reach 380–408 mm · Head angle 71.2–72.6° · Tyre clearance 50 mm

Measure	XS	S	M	ML	L	XL
Stackmm	545	566	589	611	630	650
Reachmm	380	385	391	397	402	408
Stack / Reach	1.43	1.47	1.51	1.54	1.57	1.59
Head angle°	71.2°	71.6°	71.8°	72.2°	72.3°	72.6°
Seat angle°	74.1°	73.7°	73.2°	72.8°	72.5°	72.1°
Head tubemm	96	117	140	162	181	201
Seat tubemm	445	480	505	530	550	575
Top tube (effective)mm	535	551	569	586	601	618
Chainstaymm	435	435	435	435	435	435
Rear centre (horizontal)mm	428	428	428	428	429	429
Wheelbasemm	1025	1033	1041	1048	1058	1070
Front centremm	602	610	617	624	634	646
BB dropmm	78	78	76	76	74	74
BB heightmm	275	275	277	277	279	279
Fork offsetmm	55	55	50	48	48	50
Trailmm	62	60	63	62	63	58

italic = calculated from the other values · Source: Geometry table Trek, as of Oct 25, 2026

Size finder · transfer your fit

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Enter your well-fitting bike with saddle height, seatpost and cockpit. For every size of the new bike we calculate the stem, spacers, saddle height, setback and saddle position that reproduce the same contact points. This is a geometric approximation without guarantee and does not replace a professional bike fit.

Your bike – how you sit today

Saddle

mmmmmm

Cockpit

mmmm°

Saddle: 208 mm behind · 689 mm above BB
Handlebar: 476 mm ahead · 648 mm above BB
Saddle–bar: 684 mm · drop 41 mm

Saddle height: bottom bracket centre to top of saddle along the seat-tube axis. Saddle fore/aft: + forward, − back. Spacers incl. top cap, handlebar centre = stem clamp.

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All frame sizes at a glance

All frame sizes by stack and reach or any other measure – click a dot or line to add the bike to the comparison.

1040 of 1040 sizes · 159 models

Each dot is a frame size. Coloured dots with a letter = current comparison.

Similar to Checkpoint ALR Gen 3 (2026) M

only Gravel

Similarity over the axes of the geometry profile below; stack and reach count 1.5×. The best-matching size per model, filters are respected.

Geometry profile

Each line is a frame size across all selected measures. Drag on an axis to filter a range – this also affects the chart and the similarity list.

Drag on an axis to filter a range · click a line to compare the bike

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BrandModelModel year *CategoryWheel (front)Wheel rearTyre clearance, max. (mm)Source (manufacturer page with geometry table) *

Paste a geometry table

Select the table on the manufacturer's page, copy it and paste it here. Sizes as columns or rows, German or English; values like “435/432” for flip chips are recognised.

Sizes (mm / degrees · * required · setting e.g. “High”, “Low”, “Mullet”)

Size*	Setting	Stack*	Reach*	Head ∠ °*	Seat ∠ °*	Head tube*	Chainstay*	BB drop*	BB drop rear	Seat tube	Top tube	Wheelbase	Fork offset	Axle-to-crown	BB height	Front ctr.	Trail	Stem	Spacers

Trek Checkpoint ALR Gen 3 (2026) – geometry

Similar geometry

Similar to Checkpoint ALR Gen 3 (2026) M

Geometry profile