31.8mm Bike Stem 70mm 17 Degree Adjustable Riser For Mountain Road BMX Bikes Lightweight Aluminum Dope Upgrade For 31.8 Handlebar Up Or Down Height Boost Easy Install And Stiff Control

Single 31.8mm 70mm Stem with 17° Rise for Mountain Bikes
✔️ 70mm length, +/-17° rise, 6061-T6 aluminum, 31.8mm clamp

This lightweight adjustable stem clamps to a 31.8mm handlebar and connects with a 1-1/8 inch steerer, letting riders tune height and reach. It's a handy upgrade for mountain bikes, road bikes, BMX, and DH setups to improve comfort and control on trails and streets.

✅ Handlebar clamp diameter 31.8mm (1.25 in) for secure grip
✅ Front fork steerer tube diameter 28.6mm (1-1/8 in)
✅ Length 70mm (center to center)
✅ Adjustable angle ±17 degrees to raise or lower handlebars
✅ Weight about 150g (0.34 lb) and CNC machined 6061-T6 aluminum
✅ Compatible with road, mountain, BMX, track, and DH bikes

💡 What is a 31.8mm bike stem with 70mm length and 17 degree rise used for?

Here's a handy, practical overview for riders evaluating stems.

• Helps dial in riding stance for comfort on long rides
• Quick height and reach adjustments improve visibility and control
• Fits standard 31.8mm handlebars and 1-1/8 inch steerers
• Made from CNC machined 6061-T6 aluminum for stiffness