9.3 average score from 28 reviews

RoadForce OS

Model number: BHS-08OS
  • Lightweight, durable, and stiff one-piece construction stem for 35mm handlebars
  • Lightweight, durable and stiff one-piece construction
  • For 35.0mm handlebars
  • +/- 7° angle
  • Certified to use on all types of bikes including MTB and E-bikes
More information

RoadForce 35

Your handlebar stem can change the behavior of your bike completely; the angle, length, and stiffness make all the difference. The RoadForce 35 has a 7 degrees angle that makes your handlebar drop or rise, according to what you prefer. The RoadForce OS is available in 2 different sizes to make sure there is a stem that suits your position. The Roadforce 35 is certified for e-bike, road, touring, and mountain bikes. You got the power to control, we provide you with the tools.


  • Sizes 60mm (130g), 40mm (114g)


  • Stem type Fixed
  • Angle (degrees) -7 / +7
  • Material 6061 T6 Aluminum
  • Bar center diameter (mm) 35
  • Di2 Compatible No
  • E-bike certified Yes
  • Fork pipe diameter (mm) 28.6mm (1 1/8")
  • Compatible with BHS-91 Stemfix, BHS-92 Gofix
  • Certified for E-Bike (EN 15194), MTB (EN 14766 / ISO 4210), Road (EN 14781 / ISO 4210), Touring (EN 14764 / ISO 4210)
Handlebar center diameter

Handlebar center diameter

The handlebar center diameter refers to the size of the handlebar where it attaches to the stem or another accessory. This diameter can vary between different types of bikes. Common sizes include 31.8mm for road bikes and mountain bikes, and 25.4mm for trekking and city bikes. Check your handlebar's center diameter to ensure compatibility when purchasing a new stem.

Stem angle

Stem angle

The angle of a cycling stem, often called 'rise,' impacts your riding position. A stem with a 0º angle is perpendicular to the steerer tube. Positive angles, like +6º, raise your handlebar, creating a more upright position. In contrast, a double-angled stem or flipping the stem creates a negative angle, making your upper body flatter and more aerodynamic. Our range includes stems with varying degrees of rise, from zero to -40º to +60º. It's essential to test different stems for the best fit or consult your local bike shop or get a bike fit for personalized advice.