Promax Impact stems have a 45-degree top-load clamp design for BMX racing and freestyle. Available with 40- and 45-millimeter extensions, they are cold forged from the highest quality 6061-T6 aluminum then CNC machined to refine the shape and further reduce weight. The ""open"" design keeps weight low, while maintaining plenty of strength and ensuring your bars stay put.
*Suitable for 1"" (inch) fork steerer tubes only.
- 40mm: 272 grams
- 45mm: 278 grams