DT Swiss EX 1700 Spline Front Wheel - 29" 15 x 110mm Boost 6-Bolt BlackDT Swiss EX 1700 SPLINE Front Wheel 29" 15 x 110mm Boost 6 Bolt Black. EX 1700 SPLINE wheels feature a super strong and welded 30 mm wide aluminum rim with a profile design made to withstand the hardest use of Enduro racing while still keeping the weight low for long and demanding uphills. Laced to double butted competition straightpull spokes the EX 1700 SPLINE wheels are built to take a beating. Welded Aluminum rim with 30mm internal width