Easton ea70 stemeastons new ea70 4 bolt stem is race ready with eastons proprietary ea70 alloy top lock technology dst and race proven taperwall technology the 3d forged design and shot peen finish ensures maximum strength and fatigue life perfect for the real enthusiast or racer looking for that winning edge features weight145 grams 120mm diameter31 8mm materialeaston ea70 aluminum 3d forgedbuy easton components from chain reaction cycles the worlds largest online bike store