Crank Brothers Cobalt 3 Stem

Crank Brothers Cobalt 3 Stem Info

The first thing you’ll notice about the Crank Brothers Cobalt 3 Stem is that there’s no face plate. The brothers decided it was extraneous, and they could meet their goals better without it. Not only is it light, at 148g for a 100mm length, but it’s sleek and stiff and strong.

They 3D forge the stem from 6061-T6 aluminum. The handlebar clamp fits 31.8mm handlebars and is a two-part pinch-clamp, with SCM 435 steel bolts doing the honors. There’s a trick red dust cover that sits between the bars and the stem.

In the back, the steerer clamp is 47mm tall and is tightened via two more SCM 435 steel bolts.

The Crank Brothers Cobalt 3 Stem has a plus or minus six-degree rise. Whichever way you switch it, it’s  a flipping cool mating of bars and steerer to performance.

Crank Brothers GEM Air Pump, Two Products One Copy - S and L, 0-250
Meta: mini, air, Schrader, Presta, lock, low, high, pressure, aluminum

Crank Brothers has an unbeatable feature in their GEM mini-pumps. A switch that converts the pump action from high volume to high pressure. Start pumping on high volume. When it gets hard, switch to high pressure. For many, they make the switch around 40psi.

The GEM’s shafts are made of 6061-T6 aluminum. While a bit heavier than plastic, it is more durable and handles heat, which is inevitable in pumping, better. The bottom has a knob for the switch. It is contoured for good grip, and just above it on the shaft is a knurled surface, which should grab your hand or glove easily.

The head locks onto the valve. The head can be converted from Presta to Schrader in seconds. When you don’t need it, you can stick it into a pocket or bag or use the included mount to secure it to your frame.

There are two sizes, Small and Large. Small measures 176mm in length and weighs 128g, Large is 205mm and weighs 155g. Large is easier to pump with; Small is easier to stow.

The Crank Brothers GEM Air Pump is smart, strong, reliable.