The defy50 stem is the perfect stem for your trailall mountain build it features a low stack height top close clamp design 50mm 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 features 318mm clamp defy50 and 35mm clamp defy50 available cnc 6061 alloy top close clamp design 31mm stack height 50mm reach 5mm rise 189g stem cap included the body has been slimmed down to shave 40g off the weight