The defy is the perfect stem for your trailall mountain build it features a low stack height short reach and 5mm rise it has wide clamping area for bar stability and an internal steerer clamp to keep your knees safe out on the trail twin clamp cnc machined 6061 alloy length 50mm rise 5mm 31mm stack height clamp size 318 40pictured41 and 35mm 95mm long 55mm wide 54mm tall stem cap includedweight 228 grams 40inc stem cap41 218 grams 40not including stem cap41