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Promax S-29 0-Degrees Race Stem - 80mm

Developed for BMX Racing, the S-29 offers the perfect configuration to set up the rider for maximum comfort and control. Featuring an oversize extension tube and faceplate with massive clamping area, it’s sure to keep your bars stylishly in place through the most demanding terrain. The oversize faceplate also results in one of the stiffest stem-to-bar interfaces available.

The stems are cold forged and CNC-machined from 6061-T6 aluminum for strength, low weight and durability. Available with extension from 50 to 100 millimeters in 10-millimeter increments. Meets or exceeds ENM standards. Available in anodized red, blue, gold and black.


  • 50MM: 119 grams/4.19 ounces
  • 60MM: 133 grams/4.69 ounces
  • 70MM: 147 grams/5.18 ounces
  • 80MM: 154 grams/5.43 ounces
  • 90MM: 160 grams/5.64 ounces
  • 100MM: 193 grams/6.8 ounces