Hello welcome tot he forum and congrats on the new bike. if you just bought a new bike why do you have to up grade? just ride it an enjoy that 'new bike' smell LOL the only things I would recomend (unless you like to walk) is a seat bag and a spare tube or two, some tire levers and pump of some type.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk