bike geometry
Checkpoint 2026
Compare size-specific bike geometry, including reach, stack, angles, wheelbase and the measurements that influence fit and handling.
Trek › Checkpoint › Standard › Checkpoint
Checkpoint geometry measurements
Choose the recorded size and configuration. Geometry figures can change by size; RideDNA does not collapse those values into one misleading answer.
What is the reach of the Checkpoint?
Reach is the horizontal distance from the bottom bracket to the top of the head tube. Also searched as frame reach.
| Configuration | Size | Reach | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 382.6 mm | RideDNA-derived |
| Checkpoint geometry | S | 387.7 mm | RideDNA-derived |
| Checkpoint geometry | ML | 397.8 mm | RideDNA-derived |
| Checkpoint geometry | M | 392.3 mm | RideDNA-derived |
| Checkpoint geometry | L | 403 mm | RideDNA-derived |
| Checkpoint geometry | XL | 408.9 mm | RideDNA-derived |
What is the stack of the Checkpoint?
Stack is the vertical distance from the bottom bracket to the top of the head tube. Also searched as frame stack.
| Configuration | Size | Stack | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 535.1 mm | RideDNA-derived |
| Checkpoint geometry | S | 555.5 mm | RideDNA-derived |
| Checkpoint geometry | ML | 600.5 mm | RideDNA-derived |
| Checkpoint geometry | M | 579 mm | RideDNA-derived |
| Checkpoint geometry | L | 619.9 mm | RideDNA-derived |
| Checkpoint geometry | XL | 640.2 mm | RideDNA-derived |
What is the effective top tube of the Checkpoint?
Effective top tube is the horizontal distance between the head-tube and seat-tube centerlines. Also searched as ETT, virtual top tube, horizontal top tube.
| Configuration | Size | Effective top tube | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 536 mm | RideDNA-derived |
| Checkpoint geometry | S | 547 mm | RideDNA-derived |
| Checkpoint geometry | ML | 578 mm | RideDNA-derived |
| Checkpoint geometry | M | 566 mm | RideDNA-derived |
| Checkpoint geometry | L | 589 mm | RideDNA-derived |
| Checkpoint geometry | XL | 601 mm | RideDNA-derived |
What is the head tube angle of the Checkpoint?
Head tube angle describes the steering-axis angle relative to the ground. Also searched as HTA, head angle, steering angle.
| Configuration | Size | Head tube angle | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 71 ° | RideDNA-derived |
| Checkpoint geometry | S | 71.4 ° | RideDNA-derived |
| Checkpoint geometry | ML | 72 ° | RideDNA-derived |
| Checkpoint geometry | M | 71.6 ° | RideDNA-derived |
| Checkpoint geometry | L | 72.1 ° | RideDNA-derived |
| Checkpoint geometry | XL | 72.4 ° | RideDNA-derived |
What is the seat tube angle of the Checkpoint?
Seat tube angle describes the seat-tube angle relative to the ground. Also searched as STA, seat angle, effective seat angle.
| Configuration | Size | Seat tube angle | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 74 ° | RideDNA-derived |
| Checkpoint geometry | S | 74 ° | RideDNA-derived |
| Checkpoint geometry | ML | 73.3 ° | RideDNA-derived |
| Checkpoint geometry | M | 73.3 ° | RideDNA-derived |
| Checkpoint geometry | L | 73.3 ° | RideDNA-derived |
| Checkpoint geometry | XL | 73.3 ° | RideDNA-derived |
What is the wheelbase of the Checkpoint?
Wheelbase is the distance between the front and rear wheel axles. Also searched as axle-to-axle length.
| Configuration | Size | Wheelbase | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 1015.7 mm | RideDNA-derived |
| Checkpoint geometry | S | 1024 mm | RideDNA-derived |
| Checkpoint geometry | ML | 1043 mm | RideDNA-derived |
| Checkpoint geometry | M | 1034.5 mm | RideDNA-derived |
| Checkpoint geometry | L | 1053.4 mm | RideDNA-derived |
| Checkpoint geometry | XL | 1062.5 mm | RideDNA-derived |
What is the chainstay length of the Checkpoint?
Chainstay length, also called rear center, is the distance from the bottom bracket to the rear axle. Also searched as Chainstay, rear center, rear centre.
| Configuration | Size | Chainstay length | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 423.2 mm | RideDNA-derived |
| Checkpoint geometry | S | 423.2 mm | RideDNA-derived |
| Checkpoint geometry | ML | 423.2 mm | RideDNA-derived |
| Checkpoint geometry | M | 423.2 mm | RideDNA-derived |
| Checkpoint geometry | L | 423.2 mm | RideDNA-derived |
| Checkpoint geometry | XL | 423.2 mm | RideDNA-derived |
What is the bottom bracket height of the Checkpoint?
Bottom bracket height is the vertical distance from the ground to the bottom bracket. Also searched as BB height.
| Configuration | Size | Bottom bracket height | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 280.7 mm | RideDNA-derived |
| Checkpoint geometry | S | 279.7 mm | RideDNA-derived |
| Checkpoint geometry | ML | 279.5 mm | RideDNA-derived |
| Checkpoint geometry | M | 283.7 mm | RideDNA-derived |
| Checkpoint geometry | L | 281.6 mm | RideDNA-derived |
| Checkpoint geometry | XL | 281.5 mm | RideDNA-derived |
What is the front center of the Checkpoint?
Front center is the distance from the bottom bracket to the front wheel axle. Also searched as front centre.
| Configuration | Size | Front center | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 597.3 mm | RideDNA-derived |
| Checkpoint geometry | S | 605.6 mm | RideDNA-derived |
| Checkpoint geometry | ML | 624.4 mm | RideDNA-derived |
| Checkpoint geometry | M | 616 mm | RideDNA-derived |
| Checkpoint geometry | L | 634.8 mm | RideDNA-derived |
| Checkpoint geometry | XL | 643.8 mm | RideDNA-derived |
What is the fork offset of the Checkpoint?
Fork offset is the perpendicular distance between the steering axis and the front axle. Also searched as fork rake, rake.
| Configuration | Size | Fork offset | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 49 mm | RideDNA-derived |
| Checkpoint geometry | S | 49 mm | RideDNA-derived |
| Checkpoint geometry | ML | 49 mm | RideDNA-derived |
| Checkpoint geometry | M | 49 mm | RideDNA-derived |
| Checkpoint geometry | L | 49 mm | RideDNA-derived |
| Checkpoint geometry | XL | 49 mm | RideDNA-derived |
What is the head tube length of the Checkpoint?
Head tube length is the measured length of the frame's head tube. Also searched as Head tube, head tube.
| Configuration | Size | Head tube length | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 86 mm | RideDNA-derived |
| Checkpoint geometry | S | 106 mm | RideDNA-derived |
| Checkpoint geometry | ML | 151 mm | RideDNA-derived |
| Checkpoint geometry | M | 130 mm | RideDNA-derived |
| Checkpoint geometry | L | 171 mm | RideDNA-derived |
| Checkpoint geometry | XL | 191 mm | RideDNA-derived |
What is the seat tube length of the Checkpoint?
Seat tube length is the recorded length of the frame's seat tube; measurement conventions can differ by manufacturer. Also searched as Seat tube, seat tube, frame size.
| Configuration | Size | Seat tube length | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 445 mm | RideDNA-derived |
| Checkpoint geometry | S | 480 mm | RideDNA-derived |
| Checkpoint geometry | ML | 530 mm | RideDNA-derived |
| Checkpoint geometry | M | 505 mm | RideDNA-derived |
| Checkpoint geometry | L | 550 mm | RideDNA-derived |
| Checkpoint geometry | XL | 575 mm | RideDNA-derived |
What is the standover height of the Checkpoint?
Standover height is the ground-to-top-tube height at the manufacturer's stated measurement point. Also searched as Standover, stand over height, standover clearance.
| Configuration | Size | Standover height | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 735.7 mm | RideDNA-derived |
| Checkpoint geometry | S | 761.7 mm | RideDNA-derived |
| Checkpoint geometry | ML | 807.2 mm | RideDNA-derived |
| Checkpoint geometry | M | 788.7 mm | RideDNA-derived |
| Checkpoint geometry | L | 828.6 mm | RideDNA-derived |
| Checkpoint geometry | XL | 850.6 mm | RideDNA-derived |
What is the fork length of the Checkpoint?
Fork length is the axle-to-crown distance recorded for the fork. Also searched as axle to crown, A2C.
| Configuration | Size | Fork length | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 416.4 mm | RideDNA-derived |
| Checkpoint geometry | S | 416.4 mm | RideDNA-derived |
| Checkpoint geometry | ML | 416.4 mm | RideDNA-derived |
| Checkpoint geometry | M | 416.4 mm | RideDNA-derived |
| Checkpoint geometry | L | 416.4 mm | RideDNA-derived |
| Checkpoint geometry | XL | 416.4 mm | RideDNA-derived |
What is the wheel flop of the Checkpoint?
Wheel flop is a calculated steering-geometry value based on trail and head tube angle. Also searched as flop.
| Configuration | Size | Wheel flop | Source |
|---|---|---|---|
| Checkpoint geometry | XS | 21.9 mm | RideDNA-derived |
| Checkpoint geometry | S | 20.6 mm | RideDNA-derived |
| Checkpoint geometry | ML | 18.8 mm | RideDNA-derived |
| Checkpoint geometry | M | 20.4 mm | RideDNA-derived |
| Checkpoint geometry | L | 18.7 mm | RideDNA-derived |
| Checkpoint geometry | XL | 17.9 mm | RideDNA-derived |
Geometry
Available sizes: XS, S, ML, M, L, XL.
Checkpoint geometry
Jump to size: XS · S · M · L · XL · ML
| Size | Reach | Stack | ETT | HTA | STA | Trail | Wheelbase | Chainstay | BB drop | BB height | Front center | Fork offset | Head tube | Seat tube | Standover | Fork length | Wheel flop | Max tire |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| XS | 382.6 mm | 535.1 mm | 536 mm | 71 ° | 74 ° | — | 1015.7 mm | 423.2 mm | — | 280.7 mm | 597.3 mm | 49 mm | 86 mm | 445 mm | 735.7 mm | 416.4 mm | 21.9 mm | — |
| S | 387.7 mm | 555.5 mm | 547 mm | 71.4 ° | 74 ° | — | 1024 mm | 423.2 mm | — | 279.7 mm | 605.6 mm | 49 mm | 106 mm | 480 mm | 761.7 mm | 416.4 mm | 20.6 mm | — |
| M | 392.3 mm | 579 mm | 566 mm | 71.6 ° | 73.3 ° | — | 1034.5 mm | 423.2 mm | — | 283.7 mm | 616 mm | 49 mm | 130 mm | 505 mm | 788.7 mm | 416.4 mm | 20.4 mm | — |
| L | 403 mm | 619.9 mm | 589 mm | 72.1 ° | 73.3 ° | — | 1053.4 mm | 423.2 mm | — | 281.6 mm | 634.8 mm | 49 mm | 171 mm | 550 mm | 828.6 mm | 416.4 mm | 18.7 mm | — |
| XL | 408.9 mm | 640.2 mm | 601 mm | 72.4 ° | 73.3 ° | — | 1062.5 mm | 423.2 mm | — | 281.5 mm | 643.8 mm | 49 mm | 191 mm | 575 mm | 850.6 mm | 416.4 mm | 17.9 mm | — |
| ML | 397.8 mm | 600.5 mm | 578 mm | 72 ° | 73.3 ° | — | 1043 mm | 423.2 mm | — | 279.5 mm | 624.4 mm | 49 mm | 151 mm | 530 mm | 807.2 mm | 416.4 mm | 18.8 mm | — |
Length measurements are in millimeters; HTA and STA are in degrees. ETT means effective top tube.
Size-to-size changes
Differences are calculated from the recorded values; they are not fit recommendations.
- Checkpoint geometry: XS → S — Reach +5.1 mm, Stack +20.4 mm, ETT +11 mm, HTA +0.4 °, STA +0 °, Wheelbase +8.3 mm, Chainstay +0 mm, BB height -1 mm, Front center +8.3 mm, Fork offset +0 mm, Head tube +20 mm, Seat tube +35 mm, Standover +26 mm, Fork length +0 mm, Wheel flop -1.3 mm
- Checkpoint geometry: S → M — Reach +4.6 mm, Stack +23.5 mm, ETT +19 mm, HTA +0.2 °, STA -0.7 °, Wheelbase +10.5 mm, Chainstay +0 mm, BB height +4 mm, Front center +10.4 mm, Fork offset +0 mm, Head tube +24 mm, Seat tube +25 mm, Standover +27 mm, Fork length +0 mm, Wheel flop -0.2 mm
- Checkpoint geometry: M → L — Reach +10.7 mm, Stack +40.9 mm, ETT +23 mm, HTA +0.5 °, STA +0 °, Wheelbase +18.9 mm, Chainstay +0 mm, BB height -2.1 mm, Front center +18.8 mm, Fork offset +0 mm, Head tube +41 mm, Seat tube +45 mm, Standover +39.9 mm, Fork length +0 mm, Wheel flop -1.7 mm
- Checkpoint geometry: L → XL — Reach +5.9 mm, Stack +20.3 mm, ETT +12 mm, HTA +0.3 °, STA +0 °, Wheelbase +9.1 mm, Chainstay +0 mm, BB height -0.1 mm, Front center +9 mm, Fork offset +0 mm, Head tube +20 mm, Seat tube +25 mm, Standover +22 mm, Fork length +0 mm, Wheel flop -0.8 mm
- Checkpoint geometry: XL → ML — Reach -11.1 mm, Stack -39.7 mm, ETT -23 mm, HTA -0.4 °, STA +0 °, Wheelbase -19.5 mm, Chainstay +0 mm, BB height -2 mm, Front center -19.4 mm, Fork offset +0 mm, Head tube -40 mm, Seat tube -45 mm, Standover -43.4 mm, Fork length +0 mm, Wheel flop +0.9 mm
RideDNA-derived values
These deterministic calculations use the recorded manufacturer inputs above. They are separate from manufacturer facts and are not fit recommendations.
- Checkpoint geometry size XS stack Reach Ratio: 1.4
- Checkpoint geometry size S stack Reach Ratio: 1.43
- Checkpoint geometry size ML stack Reach Ratio: 1.51
- Checkpoint geometry size M stack Reach Ratio: 1.48
- Checkpoint geometry size L stack Reach Ratio: 1.54
- Checkpoint geometry size XL stack Reach Ratio: 1.57
Bike details
- competitor Model Id
- d72c5bfd-e2e6-4b1b-b8f7-b1e0de1b8b33