Product Note: wheels may bear the "ESSOR" or "STATE" logo on the rim. No mechanical differences exist in these 2 batches. Please refer to images to see both variations. Designed in the USA, all Essor USA track wheels offer optimal strength and stiffness. Essor wheels are a top choice for cycling enthusiasts as they are sustainable, reliable and scientifically designed for optimal performance. The hubs and spokes on Essor track wheels are built for maximum durability and weight consciousness to ensure they make your bike lighter, faster and more aerodynamic. [FEATURES] RIM: 700c Alloy Rim with 31mm Depth DIAMETER: Internal: 15mm / External: 20mm HUB: Sealed Bearing Hubs / Flip-Flop Rear (Fixed/Free) SPOKES: 14G - Pillar PSR 2018 AXLE: M10 Rear M9 Front WEIGHT: Front: 1000g | Rear: 1130g | Set: 2130g SPACING: Front: 100mm | Rear: 120mm INCLUDES: 16T Fixed Gear Cog, Lockring, High-Quality Nylon Rim Strip, and Track Nuts (Freewheel Not Included). TIRE RECOMMENDATION: We recommend a 700x23c to 700x28c road tire Risk-Free Purchase - State Bicycle Co. offers FREE EXCHANGES* -If this item doesn't work out, we'll send you a return label and exchange for free!