Independently third party tested to be capable
of runflat distances in excess of 250km


Both Runflat CBR and Runflat CBR Escape models are undergoing a continuing a programme of third party performance verification trials. Performance claims will only be published in line with verified reports from organisations running these trials.

Runflat CBR is a new product so has been subject to a very rigorous testing regime.

At the design stage each Runflat CBR type is assessed through Finite Element Analysis (FEA) and Failure Mode and Effect Analysis (FMEA), then static laboratory tested, endurance and longevity tested, followed by track testing, environmental and durability trials.

FEA is used at the design stage to assesses overall strength and weight carrying capacity, shock resistance, cornering load and kerb strike effects and beadlock effect and forces.

Once the design of each Runflat CBR model has been adjusted in line with the findings of FEA and FMEA testing, prototype components are manufactured in order to continue to static trials, which are carried out at Boeing’s Advanced Manufacturing Research Centre. Strength, weight capacity, shock absorption, kerb strike and beadlock force and effect are measured.

Results are then analysed and components are fine-tuned and re-tested until the required parameters are met.

At this stage, assembled wheel, tyre and runflat units are longevity tested by one of the UK’s leading OEM wheel manufacturers. Continuous test runs simulating 10,000 km at 90mph (144kph) followed by brake and acceleration simulations, prior to stripping down and inspection.

FEA_testing1Further trials Runflat CBR has passed include laboratory impact testing to ensure sufficient shock absorption to help protect vehicle suspension and to resist runflat damage during off-road runflat.

In addition to validation trials carried out at IDIADA, Spain and Bruntingthorpe, UK, further performance trials are to be carried out by MIRA. Also, military vehicle OEMs and other bodies throughout 2018. These results will be published once completed.