https://www.autosport.com/f1/news/red-b ... /10359977/Lightweight chassis
Although Horner dismissed the idea of Red Bull having introducing a lightweight chassis for Spa, he was coy on the possibility of the team working on such a plan.
Red Bull has battled against the minimum weight limit all season, but has been able to make solid progress to get within a few kilogrammes of where it ideally wanted to be.
Asked about the possibility of Red Bull bringing a lighter chassis in the next two or three races – with Singapore having been singled out as a possible point to debut it – Horner was very careful with his words.
“There's no...these chassis will run for the next few races,” he said.
Sounds like they could well be seen at Singapore