The seat post clamp secures your bike firmly

Sealing method: Contains cutting-edge molecules

Thermowelded Layer Construction combines multiple layers without overlaps for excellent ventilation and reduced weight

Large: Measures 482

Ventilation: It is well-ventilated with 18 helmet vents

SRAM XX1 Eagle Type 3 12 Speed Rear Derailleur - Lunar Grey - 12 Speed Envelope Shipping The seat post clamp securesThe top of the line XX1 Eagle derailleur is the next evolution of SRAM's brilliant X HORIZON derailleur range. The cage on the latest models (Lunar Grey) has been tweaked slightly to increase the range to work with 10 52t cassettes. The XX1 Eagle features a couple of upgrades over its little brother the X01 Eagle. The Carbon Fibre outer cage is the most noticeable change, while there are also upgraded stainless steel pulley bearings hiding in there