New DTM Regulations: Tyre Pools and Rules Explained

As the 2026 DTM season approaches its opener in Spielberg, significant changes to the regulations have been unveiled. The introduction of two distinct tyre pools and the so-called 'Rene Rast rule' are set to reshape the competitive landscape of the series.

One of the most notable innovations is the exclusive DTM special tyre, designed to improve lap times while managing tyre degradation more effectively. This new tyre will be used solely within the DTM and must be returned to Pirelli by the teams, ensuring that all competitors are on a level playing field.

Initially, there was discussion about teams receiving a large allocation of tyres, such as 50 sets per car for the entire season, allowing them to use them at their discretion. However, the DTM organizers have opted for a two-pool system instead. For the race-day tyre pool, the rules remain largely unchanged: teams will receive four sets of new tyres for the two race days at key events, including the season opener in Austria and the finale in Hockenheim. At other tracks like Lausitzring and Nurburgring, teams will receive three sets.

The regulations also maintain the requirement for one mandatory pit stop on Saturday and two on Sunday, ensuring strategic planning remains crucial for teams.

A major shift is seen in the tyre pool for testing and practice sessions. Instead of simply allocating tyres per race weekend, a running account will now track tyre usage. Each car will receive one set of new tyres for participating in a DTM weekend, with allocations for official test days and private tests also accounted for. This new system encourages teams to think strategically about their tyre usage throughout the season, as overusing new tyres early on could limit their availability later.

In practice sessions, teams can theoretically use up to three new sets of tyres, but strict limits apply. For instance, during free practice, a maximum of three new sets can be utilized, while official test days allow for up to six new sets. Teams may also opt to use older tyres from previous weekends, but they must adhere to a strict limit of five tyre sets per car after each test day or race weekend.

To combat potential misuse of the new tyre system, the DTM has implemented measures to prevent a black market for tyres. For instance, during officially sanctioned private test days, teams can receive up to four additional new tyre sets, but these must be returned before the next event. This rule aims to eliminate unauthorized testing and ensure fair competition.

Additionally, the introduction of the 'Rene Rast rule' addresses a loophole exploited in the previous season. Last year, the Schubert Motorsport team gained an unfair advantage by replacing a damaged rim with an intact one, effectively giving them an extra tyre. Under the new regulations, teams must now remove any discarded wheels from their tyre allocation, closing this loophole and promoting fairness.

As the DTM prepares for its 2026 season, these regulatory changes are expected to enhance the competitive spirit and strategic depth of the championship, making for an exciting year ahead.