Losi PROMOTO MX .Which upgrade part was the best?

• I installed TREAL fron... ☚I installed TREAL front brake calipers on my Losi PROMOTO MX. Driving on wet roads,, beaches,etc.
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[@DurpVonFronz]

Tires. Tires is my guess what part is the best single upgrade :)

[@KousRCLife]

It's very interesting to see the difference in driving performance when changing tires.😊