Reserve Wheels Reserve 25 GR Wheelset - 700 12 x 100/12 x 142 Center-Lock XDR Carbon DT 350Reserve Wheels Reserve 25 GR Wheelset 700 12 x 100 12 x 142 Center Lock XDR Carbon DT 350. Reserve wheels are built on the highest quality carbon rims on the market. Everything from the thickness of the rim beads to the external spoke hole reinforcements comes purely from experience of knowing what riders need at every level from international racing to your local trails. Built with standard high quality components including j bend spokes (28 count)