The NTT IndyCar Series will introduce a new, stronger rear wheel tether to keep the heavy suspension and wheel/tire assembly attached to the chassis in a crash.
This series also shortens the life of new tethers so that they do not lose strength or effectiveness.
“A few years ago we reduced the life of the tether to three years,” IndyCar’s Tino Belli told RACER. “For next year the life span he reduced to two years and at the rear he increased the size and strength of all the tethers.
Made from woven strands of Xylon, the same material used in sheets to protect the sides of the Dallara DW12 cockpit from intrusion. The additional strength contained in the new tether comes from the increased material.
“We had to make some small changes to the tether and check the load to gauge the load the tether could withstand,” Berri added. We’ve found that we’ve improved them once more with design changes that come from learning how things break, and if we have the chance to redesign things later, we’ll incorporate what we’ve learned. We also introduced a color-coding system to make it easier to know when it is time to replace the tether.”