bike geometry
ER:ONE 2026
Compare size-specific bike geometry, including reach, stack, angles, wheelbase and the measurements that influence fit and handling.
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ER:ONE 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 ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 393.6 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 380 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 386.2 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 380.9 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 414.9 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 405.8 mm | RideDNA-derived |
What is the stack of the ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 555.1 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 503.8 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 536.4 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 519.6 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 592.2 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 571.3 mm | RideDNA-derived |
What is the effective top tube of the ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 558 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 515 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 540 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 525 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 596 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 575 mm | RideDNA-derived |
What is the head tube angle of the ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 73 ° | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 70 ° | RideDNA-derived |
| ER:ONE geometry | M / 490 | 72 ° | RideDNA-derived |
| ER:ONE geometry | S / 460 | 71 ° | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 73.5 ° | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 73 ° | RideDNA-derived |
What is the seat tube angle of the ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 73.5 ° | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 75 ° | RideDNA-derived |
| ER:ONE geometry | M / 490 | 74 ° | RideDNA-derived |
| ER:ONE geometry | S / 460 | 74.5 ° | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 73 ° | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 73.5 ° | RideDNA-derived |
What is the wheelbase of the ER:ONE?
Wheelbase is the distance between the front and rear wheel axles. Also searched as axle-to-axle length.
| Configuration | Size | Wheelbase | Source |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 990.9 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 987.7 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 987 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 985.3 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 1018.5 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 1008 mm | RideDNA-derived |
What is the chainstay length of the ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 402 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 402 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 402 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 402 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 402 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 402 mm | RideDNA-derived |
What is the bottom bracket height of the ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 269 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 269 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 269 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 269 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 269 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 269 mm | RideDNA-derived |
What is the front center of the ER:ONE?
Front center is the distance from the bottom bracket to the front wheel axle. Also searched as front centre.
| Configuration | Size | Front center | Source |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 593.1 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 590 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 589.2 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 587.5 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 620.5 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 610.1 mm | RideDNA-derived |
What is the fork offset of the ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 45 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 45 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 45 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 45 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 45 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 45 mm | RideDNA-derived |
What is the head tube length of the ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 148 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 105 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 132 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 118 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 185 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 165 mm | RideDNA-derived |
What is the seat tube length of the ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 520 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 430 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 490 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 460 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 584 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 550 mm | RideDNA-derived |
What is the standover height of the ER:ONE?
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 |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 769.5 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 702 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 746.3 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 723.9 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 818.1 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 792 mm | RideDNA-derived |
What is the fork length of the ER:ONE?
Fork length is the axle-to-crown distance recorded for the fork. Also searched as axle to crown, A2C.
| Configuration | Size | Fork length | Source |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 373 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 373 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 373 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 373 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 373 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 373 mm | RideDNA-derived |
What is the wheel flop of the ER:ONE?
Wheel flop is a calculated steering-geometry value based on trail and head tube angle. Also searched as flop.
| Configuration | Size | Wheel flop | Source |
|---|---|---|---|
| ER:ONE geometry | L / 520 | 15.8 mm | RideDNA-derived |
| ER:ONE geometry | XS / 430 | 24.3 mm | RideDNA-derived |
| ER:ONE geometry | M / 490 | 18.5 mm | RideDNA-derived |
| ER:ONE geometry | S / 460 | 21.3 mm | RideDNA-derived |
| ER:ONE geometry | XXL / 584 | 14.6 mm | RideDNA-derived |
| ER:ONE geometry | XL / 550 | 15.8 mm | RideDNA-derived |
Geometry
Available sizes: L / 520, XS / 430, M / 490, S / 460, XXL / 584, XL / 550.
ER:ONE geometry
Jump to size: L / 520 · M / 490 · S / 460 · XL / 550 · XS / 430 · XXL / 584
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L / 520 | 393.6 mm | 555.1 mm | 558 mm | 73 ° | 73.5 ° | — | 990.9 mm | 402 mm | — | 269 mm | 593.1 mm | 45 mm | 148 mm | 520 mm | 769.5 mm | 373 mm | 15.8 mm | — |
| M / 490 | 386.2 mm | 536.4 mm | 540 mm | 72 ° | 74 ° | — | 987 mm | 402 mm | — | 269 mm | 589.2 mm | 45 mm | 132 mm | 490 mm | 746.3 mm | 373 mm | 18.5 mm | — |
| S / 460 | 380.9 mm | 519.6 mm | 525 mm | 71 ° | 74.5 ° | — | 985.3 mm | 402 mm | — | 269 mm | 587.5 mm | 45 mm | 118 mm | 460 mm | 723.9 mm | 373 mm | 21.3 mm | — |
| XL / 550 | 405.8 mm | 571.3 mm | 575 mm | 73 ° | 73.5 ° | — | 1008 mm | 402 mm | — | 269 mm | 610.1 mm | 45 mm | 165 mm | 550 mm | 792 mm | 373 mm | 15.8 mm | — |
| XS / 430 | 380 mm | 503.8 mm | 515 mm | 70 ° | 75 ° | — | 987.7 mm | 402 mm | — | 269 mm | 590 mm | 45 mm | 105 mm | 430 mm | 702 mm | 373 mm | 24.3 mm | — |
| XXL / 584 | 414.9 mm | 592.2 mm | 596 mm | 73.5 ° | 73 ° | — | 1018.5 mm | 402 mm | — | 269 mm | 620.5 mm | 45 mm | 185 mm | 584 mm | 818.1 mm | 373 mm | 14.6 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.
- ER:ONE geometry: L / 520 → M / 490 — Reach -7.4 mm, Stack -18.7 mm, ETT -18 mm, HTA -1 °, STA +0.5 °, Wheelbase -3.9 mm, Chainstay +0 mm, BB height +0 mm, Front center -3.9 mm, Fork offset +0 mm, Head tube -16 mm, Seat tube -30 mm, Standover -23.2 mm, Fork length +0 mm, Wheel flop +2.7 mm
- ER:ONE geometry: M / 490 → S / 460 — Reach -5.3 mm, Stack -16.8 mm, ETT -15 mm, HTA -1 °, STA +0.5 °, Wheelbase -1.7 mm, Chainstay +0 mm, BB height +0 mm, Front center -1.7 mm, Fork offset +0 mm, Head tube -14 mm, Seat tube -30 mm, Standover -22.4 mm, Fork length +0 mm, Wheel flop +2.8 mm
- ER:ONE geometry: S / 460 → XL / 550 — Reach +24.9 mm, Stack +51.7 mm, ETT +50 mm, HTA +2 °, STA -1 °, Wheelbase +22.7 mm, Chainstay +0 mm, BB height +0 mm, Front center +22.6 mm, Fork offset +0 mm, Head tube +47 mm, Seat tube +90 mm, Standover +68.1 mm, Fork length +0 mm, Wheel flop -5.5 mm
- ER:ONE geometry: XL / 550 → XS / 430 — Reach -25.8 mm, Stack -67.5 mm, ETT -60 mm, HTA -3 °, STA +1.5 °, Wheelbase -20.3 mm, Chainstay +0 mm, BB height +0 mm, Front center -20.1 mm, Fork offset +0 mm, Head tube -60 mm, Seat tube -120 mm, Standover -90 mm, Fork length +0 mm, Wheel flop +8.5 mm
- ER:ONE geometry: XS / 430 → XXL / 584 — Reach +34.9 mm, Stack +88.4 mm, ETT +81 mm, HTA +3.5 °, STA -2 °, Wheelbase +30.8 mm, Chainstay +0 mm, BB height +0 mm, Front center +30.5 mm, Fork offset +0 mm, Head tube +80 mm, Seat tube +154 mm, Standover +116.1 mm, Fork length +0 mm, Wheel flop -9.7 mm
RideDNA-derived values
These deterministic calculations use the recorded manufacturer inputs above. They are separate from manufacturer facts and are not fit recommendations.
- ER:ONE geometry size L / 520 stack Reach Ratio: 1.41
- ER:ONE geometry size XS / 430 stack Reach Ratio: 1.33
- ER:ONE geometry size M / 490 stack Reach Ratio: 1.39
- ER:ONE geometry size S / 460 stack Reach Ratio: 1.36
- ER:ONE geometry size XXL / 584 stack Reach Ratio: 1.43
- ER:ONE geometry size XL / 550 stack Reach Ratio: 1.41
Bike details
- competitor Model Id
- 40b734f0-a81d-4fe6-b8de-8f20df0f1804