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Adjustable MTB Stem 31.8mm 80 Degree, 6061-T6 Forged CNC Aluminum, Sandblasted Matte Finish, Gear-Lock Anti-Flip Design, Laser Engraved, Fits Mountain/Road/BMX Bikes (31.8x145)

Free shipping on orders over $29.99

$24.99

$ 12 .99 $12.99

In Stock

1.Color:Matte Black 110mm


About this item

  • NOTE: PLEASE CONFIRM YOUR SIZE BEFORE YOUR PURCHASE. 90, 110 130 and 145mm are not the total long of the stem.
  • 【±80° Adjustable Angle】 Reduce back strain with our wide ±80° tilt range—perfect for finding your ideal riding posture, whether climbing hills or speeding on flats.
  • 【Gear-Lock Anti-Flip System】 No more sudden slips! The patented gear-lock mechanism keeps your handlebar securely fixed, even on rough trails.
  • 【Aerospace-Grade 6061-T6 Aluminum】 Forged + CNC-machined for maximum strength-to-weight ratio—30% lighter than steel stems but just as durable.
  • 【Tactile Sandblasted Matte Finish】 Ultra-grip surface resists scratches and fingerprints, while laser-etched markings add a premium touch.
  • 【Universal Compatibility】 Fits 31.8mm handlebars and most 1-1/8" steerer tubes (MTB/Road/BMX). Includes 90/110/130/145mm length options.



Product Description

LUNJE 31.8mm Bike Stem, 35mm Short MTB Stem
LUNJE Adjustable MTB Stem 31.8mm 80 Degree
LUNJE Adjustable MTB Stem 31.8mm 80 Degree
LUNJE Adjustable MTB Stem 31.8mm 80 Degree
LUNJE 31.8mm MTB Stem

Tree
Reviewed in the United States on June 11, 2025
Turned out to be too high of a riser for me and too far foward to ower it but thats noit the fault of the product. Looks to be machined nice with very little to no burrs.
@3starsandup
Reviewed in the United States on June 1, 2025
WHAT I LIKED:- Great way to turn most any bike into a comfort bike and have a riding position that best suited me- Really easy to install and adjust- Feels solidly built, had no movement or wiggle roomWHAT I DIDN'T LIKE:- No dislikes as of yet
J.J.
Reviewed in the United States on May 27, 2025
I just purchased a 24" ebike and I noticed that when I would ride it my hands would start to go numb. I figured it had something to do with the position of the handlebars so I thought to give this handlebar riser a shot to see if it improved things. The shoet answer is YES! It has completely improvided my bike riding experience! Having the handlebar at the right height and pitch makes a world of difference!Heres what I love about this riser: 1. The adjustments are easy to make. The lower adjustments made me feel like I was leaning over the front tire which is uncomfortable to me. Raising it up allows me to sit more upright and puts the front wheel in front of me. Now I dont have that sensation that Im going to flip over the bike!2. This was an easy and cost efficient alteration to make to a bike. It was easy to install. The hardest part for me was centering the handlebar but thats cause of my own OCD.3. It's very well made. When youre using something to hold your handlebars, on an ebike that can go up to 40mph, its important for you to feel like you can trust what you have.Overall I definitely recommend this to anyone thats experiencing discomfort in their hands or back when riding their bike. Position is so important.
Chris Yura
Reviewed in the United States on May 14, 2025
If you mess with bike fit stuff on your own, having one of these is super helpful. I have always found shorter variants, which aren't great for me, but now with a 140mm fully adjustable option, I'm set. Stem is heavy, but the hinge is solid and hasn't moved on me yet. Seems very well made. Loads of tilt options up and down, torque it to spec and off you go.
Forever Bright
Reviewed in the United States on May 13, 2025
Having a tall large frame ebike and being tall myself makes for a very weird riding angle for me. Thankfully I found this extension and it works so good. I have a very long reach and this adjustable extension makes my back so happy. Probably looks weird to others but tall people will understand. The unit is thick, well made and fairly hefty but not really heavy. Huge plus! It adjusts up and down with one allen key so on the trail adjustments are really simple. No realignment of the stem required. Good product and highly recommended for tall people.
Rick
Reviewed in the United States on May 11, 2025
This bike stem worked out perfectly for me, I'm only riding my mountain bike in the street mostly so I didn't need a forward riding position. This stem allows me to easily adjust the height of my handlebars. Install and adjustment are simple and straight forward, it does change the balance of the steering a little bit, but nothing major. Overall a great stem
Zilacon
Reviewed in the United States on May 11, 2025
Quality aluminum bike stem, it fits my WAKE handle bars (31.8mm) perfectly. Easy install, just some screws to tighten and making sure your bars are perfectly angled and centered. This attached to my SOLO AIR fork (28.6mm) with no issues as well. A good attachment if you wanted more length away or towards your bike seat, or just wanted a different angle.
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