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9.3 average score from 118 reviews

RoadForce 31.8mm

Model number: BHS-08
  • check Lightweight and durable stem for 31.8mm handlebars.
  • check With +/- 6° angle for an active, sportive or competitive cycling position.
  • check For direct mount on the steerer tube, 28.6 mm (1 1/8'')
  • check Matte sandblasted finish and galvanized black bolts
  • check Certified to use on all types of bikes including MTB and E-bikes
  • check Compatible with BHS-91 Stemfix and BHS-92 GoFix bracket
More information

In stock

As low as: €0.00

RoadForce II Handlebar Stem

Your handlebar stem can change the behaviour of your bike completely; the angle, length and stiffness make all the difference. The RoadForce II has a 6 degrees angle that makes you handlebar drop or rise, whatever you prefer. The RoadForce II is available in 9 different sizes to make sure there is always a stem that fits your position. The Roadforce II is certified for E-bike, road, touring and mountainbike. You got the power to control, we provide you the tools.

Size guide

Every type of stem comes in different length sizes (mm). The stem length affects both your bicycle's handling and your riding position. The length of a stem is measured from the center point of the steerer tube to the center point of the handlebar. Shorter stems (40 - 80mm) offer quick, responsive steering, coften featured on mountain bikes. Longer stems (80 - 130mm), often used on road bikes, improve stability at higher speed. Gravel bikes typically fall in between, balancing agility and control with stem length (60 - 90mm).

The stem also influences riding position, mainly your reach. A longer stem extends your arms forward, resulting in a more aerodynamic position with your upper body folding over the bike. Conversely, a shorter stem allows for a more upright riding position with your hands closer to your body. For the best fit, we recommend a professional bike fitting or consult your bike’s geometry before selecting a stem length.

Size                      
1. Length (mm) 40 45 50 60 70 80 90 100 110 120 130
55353_Size-guide_Stems.png

Specifications

  • Stack height

    40 mm

  • Sizes

    45mm (162g), 60mm (162g), 70mm (162g), 80mm (162g), 90mm (162g), 100mm (162g), 110mm (162g), 120mm (162g), 130mm (162g), 40mm (107g), 50mm (123g)

  • Stem type

    Fixed

  • Certified for

    E-Bike (EN 15194), MTB (EN 14766 / ISO 4210), Road (EN 14781 / ISO 4210), Touring (EN 14764 / ISO 4210)

  • Material

    6061 T6 Aluminium

  • Compatible with

    BHS-91 Stemfix, BHS-92 Gofix

  • Steerer tube diameter (mm)

    28.6mm (1 1/8")

  • E-bike certified

    Y

  • Di2 Compatible

    N

  • Bar center diameter (mm)

    31.8

  • Angle (degrees)

    -6 / +6

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, or 'rise,' impacts your riding position. A 0º stem is perpendicular to the steerer tube while positive angles like +6º, raise your handlebar creating a more upright fit. Flipping the stem or using a double-angled stem creates a negative angle for a more aerodynamic position. Our range includes stems with varying degrees from zero to -40º to +60º.