Do you lean over too much on your bike? Installing Lerway's steerer tube extender to achieve a comfortable position. Product details: Material: 6061 aluminium alloy Colour: matte black Total height: 120mm Weight: 211g Spacers: 3 x 10mm spacers, 1 x 5mm spacers. Fit for steerer tube 1 1/8 inch(28.6mm). . Aluminum alloy, durable and light. 2 screw design makes more secure. Adjust the height with the 4 spacers. Read more Installing the right stem extender is a essential part of dialing in your bike fit and getting comfortable on your ride. Read more How to Install a Stem Riser? 1. Remove the top cap bolt and faceplate bolts. 2. Lift the handlebar straight off and remove it. 3. Slide the Riser onto the steerer tube. 4. Re-install handlebar and tighten the bolts. Read more Cycling Gloves Road Bike Saddles Adjustabe Angle Stem Riser for 25.