bike geometry
ULTRA-GRIT 2026
Compare size-specific bike geometry, including reach, stack, angles, wheelbase and the measurements that influence fit and handling.
Ribble › ULTRA-GRIT › Standard › ULTRA-GRIT
ULTRA-GRIT 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 ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 408.6 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 403.4 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 393.6 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 386 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 416.4 mm | RideDNA-derived |
What is the stack of the ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 588 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 562.4 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 545.4 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 525.8 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 607.1 mm | RideDNA-derived |
What is the effective top tube of the ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 585 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 570 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 550 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 522 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 602 mm | RideDNA-derived |
What is the head tube angle of the ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 72 ° | RideDNA-derived |
| ULTRA-GRIT geometry | M | 71.5 ° | RideDNA-derived |
| ULTRA-GRIT geometry | S | 71.5 ° | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 70.5 ° | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 72 ° | RideDNA-derived |
What is the seat tube angle of the ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 73.3 ° | RideDNA-derived |
| ULTRA-GRIT geometry | M | 73.5 ° | RideDNA-derived |
| ULTRA-GRIT geometry | S | 74 ° | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 75.5 ° | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 73 ° | RideDNA-derived |
What is the wheelbase of the ULTRA-GRIT?
Wheelbase is the distance between the front and rear wheel axles. Also searched as axle-to-axle length.
| Configuration | Size | Wheelbase | Source |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 1056.2 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 1047.6 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 1031.2 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 1024.7 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 1070.2 mm | RideDNA-derived |
What is the chainstay length of the ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 425.1 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 425.1 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 424.7 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 424.3 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 425.1 mm | RideDNA-derived |
What is the bottom bracket height of the ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 291 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 291 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 289 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 286 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 291 mm | RideDNA-derived |
What is the front center of the ULTRA-GRIT?
Front center is the distance from the bottom bracket to the front wheel axle. Also searched as front centre.
| Configuration | Size | Front center | Source |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 634.4 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 625.9 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 610.1 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 604.5 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 648.4 mm | RideDNA-derived |
What is the fork offset of the ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 50 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 50 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 50 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 50 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 50 mm | RideDNA-derived |
What is the head tube length of the ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 170 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 145 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 125 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 105 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 190 mm | RideDNA-derived |
What is the seat tube length of the ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 530 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 510 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 490 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 470 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 550 mm | RideDNA-derived |
What is the standover height of the ULTRA-GRIT?
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 |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 812.5 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 790.3 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 770.8 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 749.8 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 831.2 mm | RideDNA-derived |
What is the fork length of the ULTRA-GRIT?
Fork length is the axle-to-crown distance recorded for the fork. Also searched as axle to crown, A2C.
| Configuration | Size | Fork length | Source |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 396.2 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 396.2 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 396.2 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 396.2 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 396.2 mm | RideDNA-derived |
What is the wheel flop of the ULTRA-GRIT?
Wheel flop is a calculated steering-geometry value based on trail and head tube angle. Also searched as flop.
| Configuration | Size | Wheel flop | Source |
|---|---|---|---|
| ULTRA-GRIT geometry | L | 18.5 mm | RideDNA-derived |
| ULTRA-GRIT geometry | M | 20 mm | RideDNA-derived |
| ULTRA-GRIT geometry | S | 20 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XS | 23 mm | RideDNA-derived |
| ULTRA-GRIT geometry | XL | 18.5 mm | RideDNA-derived |
Geometry
Available sizes: L, M, S, XS, XL.
ULTRA-GRIT geometry
Jump to size: XS · S · M · L · XL
| 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 | 386 mm | 525.8 mm | 522 mm | 70.5 ° | 75.5 ° | — | 1024.7 mm | 424.3 mm | — | 286 mm | 604.5 mm | 50 mm | 105 mm | 470 mm | 749.8 mm | 396.2 mm | 23 mm | — |
| S | 393.6 mm | 545.4 mm | 550 mm | 71.5 ° | 74 ° | — | 1031.2 mm | 424.7 mm | — | 289 mm | 610.1 mm | 50 mm | 125 mm | 490 mm | 770.8 mm | 396.2 mm | 20 mm | — |
| M | 403.4 mm | 562.4 mm | 570 mm | 71.5 ° | 73.5 ° | — | 1047.6 mm | 425.1 mm | — | 291 mm | 625.9 mm | 50 mm | 145 mm | 510 mm | 790.3 mm | 396.2 mm | 20 mm | — |
| L | 408.6 mm | 588 mm | 585 mm | 72 ° | 73.3 ° | — | 1056.2 mm | 425.1 mm | — | 291 mm | 634.4 mm | 50 mm | 170 mm | 530 mm | 812.5 mm | 396.2 mm | 18.5 mm | — |
| XL | 416.4 mm | 607.1 mm | 602 mm | 72 ° | 73 ° | — | 1070.2 mm | 425.1 mm | — | 291 mm | 648.4 mm | 50 mm | 190 mm | 550 mm | 831.2 mm | 396.2 mm | 18.5 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.
- ULTRA-GRIT geometry: XS → S — Reach +7.6 mm, Stack +19.6 mm, ETT +28 mm, HTA +1 °, STA -1.5 °, Wheelbase +6.5 mm, Chainstay +0.4 mm, BB height +3 mm, Front center +5.6 mm, Fork offset +0 mm, Head tube +20 mm, Seat tube +20 mm, Standover +21 mm, Fork length +0 mm, Wheel flop -3 mm
- ULTRA-GRIT geometry: S → M — Reach +9.8 mm, Stack +17 mm, ETT +20 mm, HTA +0 °, STA -0.5 °, Wheelbase +16.4 mm, Chainstay +0.4 mm, BB height +2 mm, Front center +15.8 mm, Fork offset +0 mm, Head tube +20 mm, Seat tube +20 mm, Standover +19.5 mm, Fork length +0 mm, Wheel flop +0 mm
- ULTRA-GRIT geometry: M → L — Reach +5.2 mm, Stack +25.6 mm, ETT +15 mm, HTA +0.5 °, STA -0.2 °, Wheelbase +8.6 mm, Chainstay +0 mm, BB height +0 mm, Front center +8.5 mm, Fork offset +0 mm, Head tube +25 mm, Seat tube +20 mm, Standover +22.2 mm, Fork length +0 mm, Wheel flop -1.5 mm
- ULTRA-GRIT geometry: L → XL — Reach +7.8 mm, Stack +19.1 mm, ETT +17 mm, HTA +0 °, STA -0.3 °, Wheelbase +14 mm, Chainstay +0 mm, BB height +0 mm, Front center +14 mm, Fork offset +0 mm, Head tube +20 mm, Seat tube +20 mm, Standover +18.7 mm, Fork length +0 mm, Wheel flop +0 mm
RideDNA-derived values
These deterministic calculations use the recorded manufacturer inputs above. They are separate from manufacturer facts and are not fit recommendations.
- ULTRA-GRIT geometry size L stack Reach Ratio: 1.44
- ULTRA-GRIT geometry size M stack Reach Ratio: 1.39
- ULTRA-GRIT geometry size S stack Reach Ratio: 1.39
- ULTRA-GRIT geometry size XS stack Reach Ratio: 1.36
- ULTRA-GRIT geometry size XL stack Reach Ratio: 1.46
Bike details
- competitor Model Id
- ed633b12-f189-43c6-89a7-69b8b171b08a