Thanks for the quick fix however it ruins a bit the experience regarding the long (20min) races because cars that were able to run full distance with soft slicks on 10 min races with tire wear x4 Will also be able to run full distance with tire wear x2.
The good aspect with long races with tire wear x4 that you were able to chose in between the tires depending on what you wanted…
Yes, it looks like it would be sensible for multiclass to be kept at x4 tyre wear.
@General_Pretzel = Please change the tire wear multiplier in multi class back to X4.
All you’ve done is move the problem the guys who run the shorter 10 min races complained of into the 20 min multi class races. Street and sport tire builds are now pretty much pointless. The low weight cars can all run softs and everyone else mediums.
It was fine as it was
Feedback heard loud & clear. 
The Multi-Class Series specifically has been reverted back to a 4x wear scalar. This was a minor oversight on our part, so thanks to the helpful replies for catching this and helping us to maintain an optimal gameplay experience in all of our Featured Multiplayer events.
My original reply has been updated, removing that series from the list of series impacted by the 2x tire wear change.
Thank you all for your feedback. We’re closing this suggestion as fixed.
This topic reached 34 votes, ranking it among the Top 40 upvoted Motorsport Features > Multiplayer / Online topics.