# Pololu Wheel 90×10 mm (item 1435): tire, rim, 3 mm D-bore and hub mounting holes

> What are the Pololu Wheel 90×10 mm dimensions, bore and hub mounting-hole positions?

- Category: Hardware › Bearings, rails & motion
- Kind: Modern device
- Basis: Pololu's own STEP model of the 90×10 mm wheel, checked against the Pololu wheel dimension diagram.
- Page: https://xemstudio.com/objects/pololu-wheel-90x10mm/ · JSON: https://xemstudio.com/api/geometry?object=pololu-wheel-90x10mm · Plain text: https://xemstudio.com/objects/pololu-wheel-90x10mm/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 90.0 | 90.0 | 11.75 |

**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- Datum: wheel axis on Z, rear hub boss on z=0, centre of the D-bore at x=0, y=0; same geometry for every colour (items 1435–1439).
- Tire Ø90.0 × 7.3 wide on a rim Ø80.0 × 10.0 wide; the rear boss Ø6.6 protrudes 1.75 below the rim.
- Hub bore: 3.0 mm D-bore with the flat 1.0 mm from the axis, through the full hub.
- Six Ø3.1 mounting holes through the hub (5.0 deep) on a Ø19.05 bolt circle: (0, ±6.35) and (±8.25, ±4.76).
- Modelled: tire, rim, inner flange, six spokes, hub disc Ø32.0 and boss Ø16.0. Not modelled: tread detail, the R2.5 rounds in the spoke openings and small hub fillets.
- All dimensions are exact nominal mm.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| D-shaft bore | Ø3.0 D, flat 1.0 from axis | 3 mm D-shaft of a Pololu micro metal gearmotor | press | all |
| Hub mounting holes | 6 × Ø3.1 on Ø19.05 bolt circle | M3 screws into a hub adapter or bracket | designed | all |
| Tire | Ø90.0 × 7.3 wide | wheel well / ground clearance of the chassis | designed | all |

## Sizes

| hole | x (mm) | y (mm) | diameter (mm) |
|---|---|---|---|
| 1 | 0 | 6.35 | 3.1 |
| 2 | 0 | -6.35 | 3.1 |
| 3 | 8.25 | 4.76 | 3.1 |
| 4 | 8.25 | -4.76 | 3.1 |
| 5 | -8.25 | 4.76 | 3.1 |
| 6 | -8.25 | -4.76 | 3.1 |

## Where the files are

- Pololu: [Pololu Wheel 90×10mm 3D model (STEP)](https://www.pololu.com/file/0J1295/pololu-wheel-90%C3%9710mm.zip) — web — Publisher's page; dimensions are facts
- Pololu: [Pololu wheel dimensions diagram (PDF)](https://www.pololu.com/file/0J1708/pololu-wheel-dimensions.pdf) — web — Publisher's page; dimensions are facts
- Pololu: [Pololu Wheel 90×10mm Pair – Black (item 1435)](https://www.pololu.com/product/1435) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/pololu-wheel-90x10mm/index.json

- pololu-wheel-90x10mm: [STEP](https://xemstudio.com/files/hardware/pololu-wheel-90x10mm/pololu-wheel-90x10mm.step) · [STL](https://xemstudio.com/files/hardware/pololu-wheel-90x10mm/pololu-wheel-90x10mm.stl) — Pololu Wheel 90×10 mm (item 1435): tire, rim, 3 mm D-bore and hub mounting holes

## Questions

**What shaft does the Pololu 90×10 mm wheel fit?**

A 3 mm D-shaft: the bore is Ø3.0 with the flat 1.0 mm from the axis, as on Pololu micro metal gearmotors.

**Where are the hub mounting holes?**

Six Ø3.1 holes on a Ø19.05 bolt circle at (0, ±6.35) and (±8.25, ±4.76) from the bore centre.

**How wide is the wheel?**

The tire is Ø90.0 × 7.3 mm; the rim is 10.0 mm wide and the overall hub-to-rim width is 11.75 mm.

## Fits with

- [775 brushed DC motor Ø42 × 66.7 mm, Ø5 shaft](https://xemstudio.com/objects/775-dc-motor/)
- [JGA25-370 gearmotor: Ø25 gearbox on a 370 can, Ø4 D-shaft](https://xemstudio.com/objects/jga25-370-gearmotor/)
- [Metric shafts Ø3 to Ø10 with D-flats and clip grooves](https://xemstudio.com/objects/metric-shafts/)
- [Socket head cap screws, M2–M8 (ISO 4762 / DIN 912)](https://xemstudio.com/objects/socket-head-cap-screws-metric/)
- [Hex nuts, M2–M8 (ISO 4032)](https://xemstudio.com/objects/hex-nuts-metric/)