, ▁collabor ated ▁to ▁design ▁and ▁build ▁several ▁b ikes ▁using ▁Mol ina ' s ▁r ims ▁and ▁t ires . ▁Gr one wald ▁and ▁Ev ings on ▁then ▁began ▁producing ▁their ▁own ▁separate ▁lines ▁of ▁fat - t ired ▁b ikes ▁in ▁ 2 0 0 0 . ▁R ims ▁and ▁t ires ▁were ▁imported ▁to ▁Al aska ▁where ▁Wild fire ▁and ▁Ev ings on ▁began ▁making ▁small , ▁hand made ▁production ▁runs ▁and ▁custom - ordered ▁frames ▁built ▁around ▁Rem ol ino ▁ ▁r ims ▁and ▁ ▁t ires . ▁Gr one wald ▁co ined ▁the ▁tra dem ark ▁" F at ▁Bi ke " ▁in ▁ 2 0 0 1 ▁and ▁used ▁it ▁as ▁the ▁model ▁name ▁for ▁his ▁b ikes . ▁Gr one wald ▁originally ▁worked ▁with ▁Pal mer ▁Mach in ery ▁for ▁w eld ing ▁and ▁later ▁contract ed ▁frame ▁building ▁to ▁Mike ▁De Sal vo ▁at ▁De Sal vo ▁C yles ▁of ▁Ash land , ▁Oregon . ▁Gr one wald ▁continued ▁to ▁sell ▁his ▁original ▁fat b ikes ▁until ▁ 2 0 1 1 . ▁Gr one wald ' s ▁design ▁featured ▁an ▁ ▁offset ▁wheel ▁and ▁frame ▁built ▁to ▁allow ▁full ▁range ▁g ear ing , ▁since ▁he ▁was ▁using ▁standard ▁hub s ▁and ▁bottom ▁brackets ▁available ▁at ▁the ▁time . ▁ ▁Wild fire ▁and ▁Ev ings on ▁b ikes ▁were ▁used ▁in ▁the ▁Id itar od ▁Tra il ▁races ▁beginning ▁in ▁ 2 0 0 0 . ▁Also ▁that ▁year , ▁Mike ▁Cur iak ▁from