Michelin has reduced tire allocations for several classes and specific races in the IMSA WeatherTech SportsCar Championship for next year.

Confirmed in a Michelin technical bulletin sent to competitors on Wednesday, GT Le Mans class teams will have one fewer set of tires for the season-opening Rolex 24 at Daytona (37 sets), three fewer sets for the Mobil 1 Twelve Hours of Sebring (21 sets) and and a one-set reduction for DPi and LMP2 competitors (37 sets) for Sebring-only.

GTLM teams will also face a two-set reduction (20 sets) for the season-ending Motul Petit Le Mans at Michelin Raceway Road Atlanta.

No increases have been made across any of the classes or races for 2020.

The only change of compound, aside from the ‘confidential’ GTLM-specific tires, is a switch from Michelin’s Pilot Sport S8M to the harder S9M tire for the GTD class at WeatherTech Raceway Laguna Seca.

The S9M will therefore be used in seven of the 12 GTD-eligible races next year.

As reported by Sportscar365 in October, “incremental changes” in tire allocations were expected in some of the classes, as the exclusive tire provider for the DPi, LMP2 and GTD classes looks to showcase the longevity of its tires and cost-effectiveness to competitors.

Michelin also released camber limits for WeatherTech Championship teams on Wednesday.