Chains are fitted to wheels primarily to prevent skidding and to provide better traction when driving in snowy or icy conditions. They help vehicles move off without wheel spin and maintain control in deep snow by digging into the surface and creating friction. Proper use of chains enhances safety by improving grip and preventing sliding or loss of control on slippery roads. They are typically fitted on the drive wheels (front wheels for front-wheel drive, rear wheels for rear-wheel drive, and usually on front wheels for 4WD) to maximize traction. However, drivers should adhere to speed limits and manufacturer recommendations to avoid damaging the chains or vehicle.

Benefits of Fitting Chains to Wheels

• Prevent skidding by increasing traction on snow and ice
• Help move off and maintain motion without wheel spin in deep snow
• Provide better vehicle control during severe winter conditions
• Reduce the risk of accidents when driving on snow-covered or icy roads

How Chains Should Be Fitted

• Chains go on the drive wheels to maximize traction (rear wheels for rear-wheel drive, front wheels for front-wheel drive)
• For AWD or 4WD vehicles, chains are often fitted to the front wheels
• Chains should be correctly tensioned and checked after fitting to avoid damage or loss

Precautions

• Drive slowly (usually max 30 mph) while chains are fitted
• Avoid sharp turns, rapid acceleration, and potholes
• Chains increase tire diameter; ensure adequate clearance to avoid contact with the car body or suspension

In summary, chains on wheels enhance traction and safety in snowy and icy conditions by preventing skidding and wheel spin.