Selling a Shimano Dura-Ace HB-7100 track rear hub. IHB7710ARW 36 holes 120 O.L.D. NJS fixed/fixed, meaning you can attach cogs from both sides. The item is new, only unboxed. I accidentally bought wrong hole count. Included in the purchase is the hub in its original box with a lockring and axle nuts. Shipping from Czech Republic.