especially since I believe the pre 2015 or 2014 model years had the seat post clamp failure issue. You do not want to not be covered under warranty just because you are not the original owner. for that reason alone I wouldn't buy a used one older than 2015 shiv. The sport is the way to go and upgrade later. The frame is all the same for the models except the S works fact 11 carbon.

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2019 T-Rex Tri Series