Hustler OEM 606778 Front Wheel Spacer are Designed for a Wide Range of Model to Be Used on the Front Caster Wheel Assemblies. 606778 is Often Used in Models that Use Bearing & Race 606753P. 606778 Spacer is Sized to Only Fit Against the Inner Race of the Roller Bearing - Spacing the Dust Cap Away from the Wheel and Enabling the Roller Bearing to Rotate the Wheel Independently from the Bolt, Nut, Caster Fork and Wheel Dust Cap. Fits Select Hustler Models Known Fitment Family References Include: Trimstar Series: (2020 - Current) Surfer PRO Series: (All Models) Fastrack Series: (2022 - Current) X-ONE Series: (2016 - Current) * Select Early Models Came with a Different Style Bearing and Other Wheel Components - All New Replacement Wheels For these Models will Come with the Latest Version of Bearings & Wheel Components Super S Series: (2021 - Current) * 48", 52" & 60" Models Only Super SF Series: (All Models) Super Z Series: (2011 - Current) * Select Early Models Came with a Different Style Bearing and Other Wheel Components - All New Replacement Wheels For these Models will Come with the Latest Version of Bearings & Wheel Components Super Z HD Series: (2013 - Current) * Select Early Models Came with a Different Style Bearing and Other Wheel Components - All New Replacement Wheels For these Models will Come with the Latest Version of Bearings & Wheel Components Diesel Z Series: (2025 - Earlier) Super 88 Series: (All Models) Super 104 Series: (All Models) Associated Parts List WHEEL ASSEMBLY COMPONENTS 606815 - Dust Cap - Reference Number 1 * All Models Excluding Surfer PRO & Trimstar Series 606779 - Dust Cap - Reference Number 1 * Only on Surfer PRO & Trimstar Models 606780 - Seal - Reference Number 2 606778 - Spacer - Reference Number 3 606753P - Tapered Roller Bearing Assembly - Reference Number 4 * Comes with the Tapered Roller Bearing and Bearing Race. 606126 - Grease Fitting/Zirk (M8 x 1.0) - Reference Number 5 * All Models Excluding Surfer PRO & Trimstar Series 606777 - Grease Fitting/Zirk - Reference Number 5 * Only on Surfer PRO & Trimstar Models 019521 - Tire Valve Stem (TR412) - Reference Number 6 606753 KIT - Kit Includes Tapered Roller Bearing x 2, Bearing Race x 2, Lower Seal x2 (Bearings and Seals Necessary to Rebuild one Wheel) - Part Reference 2 & 4 Suggested Front Wheel Links When Redirecting to Different Part Numbers Be Sure to Verify your Model Number is Listed Under the Part Number Listing in the Model Fit Chart Before Purchasing. Surfer PRO Series - Surfer X - Trimstar Series 606740 - 606741 (11 x 4.00 -5) Super S Series 606742 (13 x 5.00 -6) - 606744 - 606745 - 607317 - 607964 (13 x 6.50 - 6) FastTrack Series - X-ONE Series - X-RIDE Series - Super Z Series - Super Z HD Series - Super SF Series - Super 88 Series 606744 - 606745 - 607317 - 607964 (13 x 6.50 - 6) Super 104 Series 606746 - 607528 (15 x 6.00 -6) Model Fit Chart Trimstar (All Models) 939496, 939504, 939512, 939538, 942268, 942276 Surfer PRO & Surfer X (All Models) 941591, 941617, 944637, 944645 FasTrack (2022 - Current) 941724, 941732, 941740, 941757, 941765, 941773, 941781, 941674, 941682, 941708, 943704, 943753, 943761 X-ONE (2016 - Current Side & Rear Discharge Models) 606788 Not Factory Installed - Could Be Interchanged - All New Wheel Replacement Part Numbers Will Come With 606788 and Newer Bearing and Wheel Components. 936237, 936245US, 936252, 936260, 936278, 936286, 936294US, 936302, 936310, 936328, 936336 606788 is Factory Installed 936740, 936765, 936773, 936781, 936799, 936815, 936823, 936831, 936849, 939314, 939322, 940056, 940064, 940072, 940080, 940106, 940114, 940122, 940130, 940197, 941062, 941070, 941369, 941831, 941856, 941864, 941872, 941880, 941898, 941922, 941930, 941971, 942201, 942334, 942797, 943399, 943407, 943787, 943795, 943803, 943811, 943829, 943837, 943845 X-RIDE (All 60" Models) 944074, 944868 Super Z (2011 - Current Side & Rear Discharge Models) 606788 Not Factory Installed - Could Be Interchanged - All New Wheel Replacement Part Numbers Will Come With 606788 and Newer Bearing and Wheel Components. 929927, 929935, 929943, 929950, 930024, 930065, 930875, 931048, 932012, 932020, 932038, 932046, 932053, 932061, 932129, 932137, 932970, 932988, 933457, 933929US, 934216, 934224, 934232, 934240, 934265, 934273, 934281, 934984US, 934992, 935007, 935015US, 935023, 935031, 935049, 935056US, 935064, 606788 is Factory Installed 936872, 936880, 936898US, 936914, 936922, 936930, 936948US, 936955, 936989, 937714, 937722, 937730, 938985, 938993, 940031, 940049, 941138, 941146, 941153, 941161, 941179, 941187, 941195, 941203, 941377, 941385, 942342, 942771, 942763, 942805, 942813, 942821, 942839, 942854, 942862, 942870, 942888, 942896, 942912, 942920, 943852, 943860, 943878, 943886, 943894, 943910, 943928, 943936, 943944 Super Z Hyper Drive (2013 - Current Side & Rear Discharge Models) 606788 Not Factory Installed - Could Be Interchanged - All New Wheel Replacement Part Numbers Will Come With 606788 and Newer Bearing and Wheel Components. 932145, 932152, 932160, 932178, 932186, 932996, 933002, 934307, 934315, 934323, 934349, 934687, 934695, 934919, 934927, 934935, 934943, 934950, 934968, 934976, 606788 is Factory Installed 936997, 937003, 937011, 937029, 937037, 937045, 937052, 937110, 939561, 939579, 939587, 939595, 941229, 941237, 941245, 941252, 941260, 941278, 941286, 941294, 941302, 941310, 941534, 941542, 941559, 941567, 942219, 942227, 942235, 942243, 942250, 942359, 942961, 942979, 942995, 943001, 943019, 943027, 943035, 943043, 943050, 943068, 943951, 943969, 943977, 943993, 943985, 944017, 944041, 944025, 944033 Super S (2021 - Current * 48", 52" & 60" Models Only) 937128, 937136, 937144, 937151, 937169, 937177, 939439, 939447, 939454, 940205, 940213, 940221, 940247, 940254, 940288, 940296, 940304, 941393, 942292, 943126, 943134, 943142, 943167, 943175 Super SF (All Models) 942029, 942037, 942045, 942052, 943506, 943514, 943522, 943530 Diesel Z (2025 - Earlier Models) 938233US, 938241US, 938258US, 938266US, 940452US, 940460US, 940478US, 940486US, 943233US, 943241US, 943249US, 943266US Super 88 (All Models) 936617, 939546 Super 104 (All Models) 937201, 937219, 939462, 939470, 939603, 939652, 941005, 941526, 942318, 943217, 943225, 944058, 944066
