240 Sport bike wheels for custom swing arm kits. When we build our 240 standard swingarms or our 240 single sided arms we use RC Components 28 different wheel designs- which set any motorcycle rider apart from all others. You can find our swinagarm kits with the use of RC wheels out as daily riders to Saturday track nights. For 240 Kits the standard dimension is as followed : Our Rear axle bolt is 28mm that sleeves thru RC Component hubs and wheel spacers. 240 Rear Wheel: 18 x 8.5 Front Wheel: 17 x 3.5 240 Rear Tire: 240-40VR18 17 inch Front Tire: 120-70V17