Built using new lightweight Sinz 20 or 24 x 1.75-inch double-wall rims, sealed-bearing Sinz hubs with hollow axles and 32 front and 36 rear spokes laced 3-cross, Sinz Pro wheels are an excellent choice for racing or training. The rear cassette hub is Shimano-compatible. They come in anodized black with red, blue or sivler rim graphics and weigh just 1,870 grams per pair in 20-inch and 2,080 grams in 24-inch including the rims strips, cog and spacers.