Old School Classic knobby BMX thread race tyre, Comp III style. Now available in three colours with skin sidewalls. 1.75 for front or rear. 2.125 for front.SPECIFICATIONS:Material:Rubber with wire beadSize:20×1.75″ & 20×2.125″Color: Redwith SkinwallWeight:20×1.75″ – 380 grams / 13.40 ounces 20×2.125″ – 460 grams / 16.23 ounces