Track is a very specific discipline and it’s growing in popularity once again. It seems that not much technology is going into the development for track wheels so Easton engineers, noticing this, developed a great new wheel set. All-new R4 TKO hubs are not like anything available. Aluminum cogs mount to the rear hub via a splined design and are then secured on with a lock ring versus the more common way of threading them on. These hand-built wheels are very stiff, strong and offer great handling under the incredible loads commonly found in track. Weight: 1545 grams. Hubs: Front-R4 Rear-R4. Spokes: Sapim double-butted silver Front: 18 radial Rear: 20 radial NDS/2-cross. Nipples: alloy black (internal). Cogs includes: 13t, 14t, and 15t. 700c