Star Ratchet Springs Hub Kit Fits for DT Swiss 240 350 440 540 Tatchet Hubs 54T | eBay
FulnKye 54T Star Ratchet Bicycle Hub Service/Upgrade Kit for X1600/X1700/1501 Wheel, for 190/240S/340/350/440/540 DT Swiss Hub - Walmart.com
Bicycle Hub Service Kit Star Ratchet for Dt Swiss 54t 18t 36t Hub Parts Sl 54 Teeth For Mtb Road Racing Bike Replacement Part - AliExpress Sports & Entertainment
DT Swiss 54T Ratchet Kit (And Why It's the Best $100 You'll Spend!) - YouTube
DT Swiss 54t Star Ratchet Kit - Cambria Bike
DT Swiss 18t to 54t Ratchet Upgrade on Roval C38 DT Swiss 350 hubs - YouTube