4 Spacers Included: The stem riser adapter comes with 4 spacers (2×5 mm & 2×10 mm), so you can adjust the height of the riser stem by swapping spacers.
Adjustable Height: The bicycle stem riser offers up to 85 mm stem height increase, you can customize your new riser stem height perfectly for your riding needs.
Perfect for Most Bikes: The stem riser is suitable for most bike with 1-1/8" (28.6 mm) threadless steerer. Your bike can do more with this mountain bike stem extender.
Material: The steerer tube extender is made from forged aluminium alloy, super strong and lightweight. A durable bike handlebar riser provides longer and more comfortable riding experiences.
Easy to Install: Just slide the stem extender onto the steerer tube and tighten it. This bike stem extender is very easy to fit.