Description BOB Nutz – Yak or Ibex are designed for solid-axle or internal-geared hubs with indicator chain style shifting. These are our remaining stock of the original Bob Nutz, so we only have 3/8 x 24 size left. However, our friends at Robert Axle make Bob Nuts too, and we stock them in our Richmond bike shop. So if you need nutz that aren’t 3/8 x 24, check out Robert Axle’s versions here. And they also make Bobbins! BOB Nutz – Yak or Ibex Features & Specs Available in (4) axle diameters and thread pitches. 3/8 x 24 fits single speed coaster brake hubs. 10 x 1 fits ISO and Japanese solid axles. 3/8 x 26 fits Shimano Nexus. I.G.H. fits Sachs multi-speed and Sturmey Archer. BOB Nutz are not compatible with SRAM Dual Drive hub or single speed bolt-on hubs. Looking for BOB retaining pins? We’ve got those too – find them here.