Blog
Sliding Gate Wheel Selection: Groove, Bearing and Bracket Explained
A sliding gate rides on two things: the wheels underneath and the track they run on. When a gate starts to drag, jump or wear its track, the wheel is usually the cause, and the fix is usually a wheel that matches the track properly rather than a bigger one. This guide covers the four decisions that settle the specification: groove, bearing, mounting and size.
1. Match the Groove to the Track
The groove is not a style choice. It has to fit the track section, or the wheel either rides on its edges or wanders sideways.
| Groove | Runs on | Notes |
|---|---|---|
| V-groove | Inverted angle iron track | The most common profile for welded steel gate tracks. |
| U-groove | Round bar track | The groove radius should suit the bar diameter. |
| Y-groove | Track matched to the groove angle | Drawn with a 92° included angle in our catalogue. |
If the track is already installed, photograph its cross-section next to a ruler. That one picture settles the groove question faster than any description.
2. Single or Double Bearing
Our catalogue lists both. In the bolt-type series, single bearing wheels run from 38 to 98 mm diameter and double bearing wheels from 48 to 198 mm. A double bearing spreads the load across a wider base and resists tilting, which matters on heavier gates and on wheels that see side load when the gate is pushed or caught by wind.
As a practical rule, stay with what is already fitted if the gate has run well, and step up to a double bearing if the existing wheels have worn unevenly or the bearings have failed early.
3. Choose the Mounting Style
- Bolt-through: the wheel turns on a threaded axle bolt passed through the frame or a pair of lugs. Replaceable without welding. Catalogue bolt sizes run from M8x50 on the smallest wheel to M14x70 on the larger double bearing wheels.
- Exterior bracket: the wheel comes in a bracket fixed under the frame, so the frame needs no axle holes.
- Interior bracket: the bracket sits within the line of the gate frame.
- Plate: the wheel is held between plates fixed to the frame.
The deciding factor is usually the gate frame you already have: its section, whether it can be drilled, and how much clearance there is between the frame and the track.
4. Size the Wheel
Catalogue wheel diameters run from 28 mm to 198 mm, with widths from 10 to 30 mm. Larger diameters roll more easily over dirt and small track joints and spread wear over a longer rolling circumference. The limit is clearance: the wheel and its mounting have to fit between the gate frame and the ground with the frame at the right height for the operator rack.
That last point is easy to miss. On an automated gate, wheel height sets the height of the gear rack relative to the operator pinion. Changing to a wheel of a different diameter can change mesh depth, so check the rack before and after. Our article on nylon and steel gear racks for sliding gates covers the rack side of the installation.
Information That Gets an Accurate Quote
- Track profile and size, or a section photograph with a ruler.
- Gate weight and the number of wheels.
- Mounting preference and clearance under the frame.
- Model number or photographs if you are replacing existing wheels.
- Quantity, and whether you also need track or gear rack.
Our Sliding Gate Wheel Range
We list 126 catalogue sliding gate wheel models across four mounting styles, each in V, U and Y groove:
- Sliding gate wheel with bolt
- Sliding gate wheel with exterior bracket
- Sliding gate wheel with interior bracket
- Sliding gate wheel with plate
Matching sliding gate gear racks in steel and nylon are available from the same factory.
Frequently Asked Questions
Can I use a V-groove wheel on a round bar track?
Not well. A V-groove on round bar runs on two narrow contact lines and wears quickly. Use a U-groove wheel for round bar track.
How many wheels does a sliding gate need?
Most sliding gates run on two wheels. Very long or heavy gates may use more. Follow the gate design or the operator manufacturer’s recommendation.
Do I need a double bearing wheel?
Not always. Double bearing wheels suit heavier gates and installations with side load. If single bearing wheels have given long service on your gate, a like-for-like replacement is reasonable.
