Reserve Wheels Reserve 42/49 SL Turbulent Aero Wheelset - 700, 12 x 100/12 x 142, Center-Lock, XDR/HG11, Carbon, TuneLose every possible gram of weight, without losing any of the strength or reliability that Reserve is known for. Carbon spokes, lifetime warranty, no fault crash replacement and no restrictions on rider weight or tire choice. The 42 29 SL is your ultimate all around wheelset. From your lunch ride to Pauline Ferrand Prevost's Tour winning efforts, this wheelset is the silver bullet. 42 49 is light enough to climb and gives you just enough depth to cut