After flipping a switch on the dashboard a chain wheel is lowered so it contacts the inside of the tire. The contact between the tire and the rubber-covered chain wheel causes the chain wheel to rotate, creating enough centrifugal force to extend the chains out in front of and under the tire.
Onspot Automatic Tire Chains (ATC)
After flipping a switch on the dashboard a chain wheel is lowered so it contacts the inside of the tire. The contact between the tire and the rubber-covered chain wheel causes the chain wheel to rotate, creating enough centrifugal force to extend the chains out in front of and under the tire.
Pros
- Permanently mounted – always ready to use
- Activated by switch – driver stays in cab
- Weight optimized
- Durable and reliable
- Custom fit – simplified installation and long product life
- Works forward, in reverse and together with ABS braking
- Activated and operated without having to stop the vehicle – up to 35 mph (50 km/h)
- Reduces breaking distance
- Only used when required – chains last longer
Cons
- Does not work when the chain wheel cannot spin freely (e.g. off-road)
- Reduced effectiveness in deep snow
Onspot can be fitted to:
Commercial Trucks
Tractor Trailer
Ambulance
Fire and Rescue
School and Transit Busses
Yard Tractor
Snow and Ice Removal
Utility Trucks
Compare with other systems
| Type of vehicle | Onspot | Conventional snow chains | Sand spreaders | Textile tire socks | 4x4 |
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| Commercial Trucks |  |
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| Tractor Trailer | |
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| Ambulances | |
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| Fire and Rescue | |
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| School Busses and Coaches | |
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| Yard Tractors | |
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| Snow and Ice Removal | |
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| Utility Trucks | |
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Maintenance
The only maintenance required is to engage the system occasionally. This will keep the self-lubricating bearings in good working condition.