pr iced ▁prede cess ors . ▁ ▁F at bi ke ▁whe els ▁and ▁dimensions ▁ 2 6 ▁in ▁F at bi ke , ▁ 5 5 9   mm ▁be ad ▁seat ▁diameter . ▁ 2 7 . 5 ▁in ▁( 6 5 0 B ) ▁F at bi ke , ▁ 5 8 4   mm ▁be ad ▁seat ▁diameter . ▁ ▁F at bi ke ▁t ires ▁have ▁a ▁width ▁typically ▁> ▁, ▁e . g . ▁, ▁, ▁, ▁, ▁and ▁an ▁internal ▁rim ▁width ▁of ▁. ▁The ▁sl immer ▁Plus ▁t ires ▁have ▁a ▁width ▁of ▁typically ▁, ▁with ▁an ▁internal ▁rim ▁width ▁of ▁> ▁, ▁typically ▁. ▁ ▁Events ▁and ▁exped itions ▁As ▁the ▁popular ity ▁of ▁fat b ikes ▁has ▁expanded , ▁fat bi ke ▁specific ▁events ▁( ra ces , ▁race ▁series , ▁t ours , ▁and ▁festiv als ) ▁have ▁emer ged . ▁Ex amples ▁include ▁the ▁Snow ▁Bi ke ▁Festival , ▁the ▁annual ▁Global ▁F at bi ke ▁Sum mit ▁( since ▁ 2 0 1 2 ), ▁the ▁F at bi ke ▁B irk ie ▁race ▁which ▁is ▁part ▁of ▁the ▁Great ▁L akes ▁F at bi ke ▁Series ▁( 2 0 1 4 – 2 0 1 5 ▁season : ▁ 8 ▁races ▁held ▁across ▁ 3 ▁states ), ▁ ▁the ▁US ▁Open ▁F at bi ke ▁Beach ▁Championships ▁( in aug ural , ▁ 2 0 1 5 ), ▁the ▁USA ▁Cy cling ▁F at ▁Bi ke ▁National ▁Championship ▁(