Promax Impact stems have a 45-degree top-load clamp design for BMX racing and freestyle. This oversized 31.8mm clamp version is available in 53mm and 60mm lengths. Cold forged from the highest quality 6061-T6 aluminium then CNC machined to refine the shape and further reduce weight. 

The "open" design keeps weight low (265 grams in a 53-mm extension), while maintaining plenty of strength and ensuring your bars stay put. These Promax stems are our pick for one of the best value for money stems on the race market.

Specs:

• 48mm: 269 grams
• 53mm: 278 grams
• 60mm: 295 grams
• Rise: 5mm
  
• Stack height 30.5mm