Factory produced Handbuilt Classic Series DT-Swiss wheels have EX-5.1d machined-sidewalls with a single-eyelet disc rim (28x20). 340 IS-disc hubs with labyrinth seal system with sealed cartridge bearings. The rear includes 10mm thru bolt to work with Saint and Hone 10mm rear derailleurs. Made with DT Competition double-butted spokes with ProLock Hex nipples. Black hub / rim / spokes / nipples. 946 grams front 1028 grams rear.