Radio Raceline Sliding Disc Dropout System  (SDDS), fits Radio Quartz (SDDS) frames. Original version without extra bolt to secure dropout adaptor. Fits Helium (Expert-PRO), Quartz, Quartz Crusier and Terra frames.

Axle:
for 10mm or 15mm hubs/axles

Features:
• fits Radio Helium (Expert/PRO) Quartz (Disc), Quartz Cruiser and Terra Carbon Frames
• Sliding Disc Dropout System (SDDS) 
• includes dropout adaptors and flat mount disc brake adaptor
• cold-forged and cnc machined
• includes all hardware
• for 10mm or 15mm hubs
• original version without extra bolt to secure non-disc side dropout adaptor