Brand new, never used 24" Weinmann rear wheel, 135mm spacing, 6-bolt ISO Shimano hyperglide HG disc hub. This is great if you have a 24" kids bike with a screw-on chainwheel and want to upgrade to a cassette for greater gear selection. Note: although the manufacturer's model name for the rim is XP26, this is indeed a 24" rim (ETRTO 507x20) $50 actual shipping cost.