Anodized aluminum construction. Available in many anodized colors as listed. All rims must use Excel spoke and nipple sets unless otherwise noted (OEM nipples are too small). SPOKE AND NIPPLE SETS. Sets include highly polished 302 stainless spokes (8 and 9 gauge) with an average tensile strength 10% higher than OEM spokes. Spoke and nipple sets work only on the 8.5mm Excel rims or OEM rims that have an 8.5mm hole.