Built using lightweight Sinz 24 X 1 1/8 double-wall rims laced 3-cross with 20h front and 24h rear spokes to precision sealed-bearing Sinz hubs with hollow axles and track nuts, Sinz Mini Cruiser Race wheels are perfect for racing or training. The rear cassette hub is Shimano-compatible. They come in anodized black with blue or black with red rim graphics and include the rim strips, cog and spacers.