Safety Guide for Motorhome and Caravan Tyres in Summer

Quick Summary

• The 5-Year Rule: Tyre failure is the leading cause of "un-commanded stops" on UK motorways. Replace tyres every 5 to 7 years regardless of tread depth.
• Heat Management: High road temperatures increase internal pressure; always check and set pressures whilst the tyres are cold.
• Age Verification: Use the 4-digit DOT code on the sidewall to identify the manufacturing date.
• Under-inflation Risks: Low pressure causes excessive sidewall heat and is the primary cause of summer blowouts.
• CP Rating: Motorhomes should use dedicated 'CP' (Camping) tyres to handle high-pressure stationary loads.

As we approach the summer touring season of 2026, the transition to warmer weather brings a specific set of mechanical stresses to your leisure vehicle. While many owners prioritise the engine or leisure battery, the most critical safety system is the four small patches of rubber connecting you to the road. High road temperatures and the heavy loads of family summer touring are a lethal combination for aged or poorly maintained tyres. At RoamWorthy, our verification team emphasises that a "tyre audit" is the most important pre-departure check you can perform. Our standards align with TyreSafe and the BTMA to ensure your journey is safe and legal.

The "Tread is Not Enough" Rule

A common mistake amongst caravanners is assuming that deep tread equates to a safe tyre. Because leisure vehicles spend most of their time stationary, their tyres rarely wear out from mileage. Instead, they perish from UV degradation and "internal ageing" of the rubber compounds. After five years, the rubber becomes brittle and prone to "spider-web" cracking in the sidewalls. In the heat of a June motorway run, these cracks can lead to a catastrophic blowout. Check the DOT code on the sidewall: a code like "1221" means the tyre was manufactured in the 12th week of 2021. If your code ends in 18, 19, or 20, it is time for replacement. This is a core part of our essential emergency kit guide.

Pressure Management in Summer

Correct inflation is the key to tyre longevity. An under-inflated tyre has a larger contact patch, which creates massive internal friction and heat. In summer, this can cause the tyre structure to delaminate.

• Check Whilst Cold: Always use a high-quality gauge before you leave the driveway. Driving just two miles will warm the air inside, giving you a false high reading.
• Load Variation: Check your manual for "Fully Laden" pressures. If you are carrying a full family and an awning, your pressures will likely need to be significantly higher than for a solo trip. Use our Motorhome Weight Checker or Caravan Towing Calculator to confirm your total load before adjusting.

Motorhome-Specific: The "CP" Rating

If you own a motorhome, ensure your tyres are CP-rated (Camping). Unlike standard commercial van tyres, CP tyres have reinforced sidewalls and are designed to handle being parked at high pressures for long periods. Using a standard van tyre on a heavy coachbuilt, such as a Bailey Autograph 74 4 or a Laika, can lead to "flat-spotting" and reduced stability. You can browse motorhome models to check specific manufacturer tyre recommendations.

Professional Support

If your tyres are showing their age, it may be time to consult a professional. Use our Find a Dealer tool to locate an AWS-approved workshop that can perform a professional tyre and brake safety check before your big summer tour. If you are considering an upgrade, you can explore caravan layouts to find a newer model with modern safety features like electronic stability control.

Frequently Asked Questions