Derbi Variant 50 2T Sport 2012. Derbi Variant 50 2T Sport 2013. Derbi Variant 50 2T Sport 2014. Derbi Variant 50 2T Sport 2015. Derbi Variant 50 2T Sport 2016. Derbi Variant 50 2T Sport 2017. In addition to the weight reduction, the cooling of the brake disc is essential.