31.8 mm Black Bicycle Stems
Bar clamp diameter is the diamater of the handlebar.
We define color as the main color of the item. It may have accents or highlights in other colors.
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Showing 796 products:
Salsa Guide Stem 100mm 31.8 +/-6 degree Black
5 of 5
( 2 )
5 of 5 stars average
( 2 reviews )
BuyPART NUM 703813
The Guide Stem is lightweight, reliable, and provides excellent steering response on the road or trail. Bead-blasted, then anodized, finish … read more
5 of 5
( 2 )
5 of 5 stars average
( 2 reviews )
In Store
Lowest Price
Salsa 7DA-296BX-100 SA2-80
Ships Free10% offretail $40.00 Ends 10/8! $36.00 + ships free
BuyPART NUM 703813 
Paul Component Engineering Boxcar Stem, 70mm +/- 15 degree 31.8mm 1-1/8" Threadless Black BuyPART NUM 789584
Paul Component Engineering Boxcar Stem, 70mm +/- 15 degree 31.8mm 1-1/8" Threadless Black Item Specifications Color: Black Weight: 155 Length: 70 … read more
your price $147.50 + ships free
BuyPART NUM 789584 
Renthal Duo Stem: 50mm 100d AluGold/Black 31.8
4 of 5
( 2 )
4 of 5 stars average
( 2 reviews )
BuyPART NUM 235686
CNC machined from 6082 T6 aluminium alloy U-shape cradle clamp eliminates handlebar stress risers found with traditional stems Made in Cheshire … read more
4 of 5
( 2 )
4 of 5 stars average
( 2 reviews )
popularyour price $132.95 + ships free
BuyPART NUM 235686 
Gusset S2 AM Stem, 31.8 x 30mm, 1-1/8", Black BuyPART NUM 335355
BTI Part Number: GU-6526 Vendor Part Number: ASGU2A23K Steerer Diameter: 1-1/8" Bar Diameter: 31.8 Rise: 0 Degrees … read more
Two remaining at this priceyour price $99.00 + ships free
BuyPART NUM 335355 
Ritchey WCS C220 Stem - 90mm, 31.8mm, -6 Degree, Aluminum, Matte Black
BuyPART NUM 509818
The WCS C220 stem is easy to install and remove thanks to a press-fit handlebar clamp interface and forward-facing hardware. Bolt forces are aligned … read more
your price $99.95 + ships free
BuyPART NUM 509818 
Cane Creek eeSilk Stem - 80mm, 31.8mm, +6/-6, 1 1/8", Alloy, Black
BuyPART NUM 460795
The Cane Creek eeSilk Stem is a fatigue-reducing compliance stem that noticeably reduces vibrations on variable surfaces. With up to 20mm of tunable compliance … read more
your price $219.99 + ships free
BuyPART NUM 460795 
Box One Front Load Stem, 48mm x 31.8mm x 28.6mm, Black BuyPART NUM 697072
Traditional front loading style BMX stems with a 31.8mm clamp, compatible with MTB and oversized BMX handlebars Constructed from 6061-T6 … read more
your price $69.99 + ships free
BuyPART NUM 697072 
Thomson X4 Mountain 31.8 130mm 90 Degrees Black 1-1/8" Threadless Stem
4 of 5
( 2 )
4 of 5 stars average
( 2 reviews )
BuyPART NUM 724444
Thomson X4 Mountain Stems feature smooth edges for carbon bar compatibility and use bolts that are custom heat treated with corrosion preventative plating. … read more
4 of 5
( 2 )
4 of 5 stars average
( 2 reviews )
your price $114.95 + ships free
BuyPART NUM 724444 
Ritchey WCS C220 Stem - 120mm, 31.8mm, -6 Degree, Aluminum, Matte Black BuyPART NUM 376377
The WCS C220 stem is easy to install and remove thanks to a press-fit handlebar clamp interface and forward-facing hardware. Bolt forces are aligned … read more
your price $99.95 + ships free
BuyPART NUM 376377 
Ritchey C-260 Superlogic Carbon Stem 
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Ritchey Stems Matte UD carbon Stack: 42mm Item Specifications Color: Black Weight: 125g Intended Use: Road Bar Clamp Diameter: 31.8mm Stem … read more
your price $249.95 + ships free
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Paul Components Boxcar Stem - 31.8 x 70mm, Black BuyPART NUM 437421
The perfect combination of stiffness and strength at a reasonable weight Made with US sourced 2024 aircraft alloy All screws are high … read more
your price $147.50 + ships free
BuyPART NUM 437421 
Ritchey Comp 4-Axis Stem - 60 mm, 31.8 Clamp, +30, 1 1/8", Alloy, Black
5 of 5
( 4 )
5 of 5 stars average
( 4 reviews )
BuyPART NUM 960951
Proven time after time to be a reliable, easily adjustable system that continues to outperform the competition, the 4-Axis stem is a sure fire go to for … read more
5 of 5
( 4 )
5 of 5 stars average
( 4 reviews )
your price $44.95
BuyPART NUM 960951 
Origin8 Everland MX/GX 40 degree Stem, 60x31.8, Black BuyPART NUM 687703
High angle stems ideal for Monstercross or Gravel bikes equipped with off-road drop bars Raises drop bars eliminating the need for excessive … read more
15% offretail $43.99 your price $37.39 + ships free
BuyPART NUM 687703 
Origin8 Throwdown MTB Stem, 35x31.8x28.6, Black BuyPART NUM 238226
Ideal for Trail, Enduro, and Downhill MTB applications 3D forged and CNC machined AL6061-T6 alloy construction Lightweight, extra-wide … read more
15% offretail $52.99 your price $45.09 + ships free
BuyPART NUM 238226 
Dimension Threadless Road Stem: 70mm; 125 Degree; Black; 1-1/8"; 31.8
4.8 of 5
( 23 )
4.8 of 5 stars average
( 23 reviews )
BuyPART NUM 481683
Dimension 31.8 Road Stems are fully forged 6061-T6 aluminum stems that have a 4-bolt handlebar clamp. 31.8mm can be used with 26.0 bars with additional … read more
4.8 of 5
( 23 )
4.8 of 5 stars average
( 23 reviews )
your price $39.00 + ships free
BuyPART NUM 481683 
Origin8 Everland MX/GX 40 degree Stem, 130x31.8, Black BuyPART NUM 654374
High angle stems ideal for Monstercross or Gravel bikes equipped with off-road drop bars Raises drop bars eliminating the need for excessive … read more
15% offretail $43.99 your price $37.39 + ships free
BuyPART NUM 654374 
Dimension Trail Stem - 35mm, 31.8mm, +/- 6 Degree, Aluminum, Black
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 912898
For cross country and all-mountain riding, Dimension Trail Stems provide a broad array of sizing options--lengths from 35 to 120mm--rigorously tested … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
your price $36.99 + ships free
BuyPART NUM 912898 
Salsa Guide Trail Stem- 40mm, 31.8 Clamp, 0 Degree, 1 1/8", Aluminum, Black 
Info
The Guide Trail Stem translates your handlebar input into precise trail movements. It's an ideal choice for modern trail bikes that have a long front … read more
10% offretail $45.00 Ends 10/8! $40.50 + ships free
Info 
Origin8 Pro-Fit MTB Quill Stem
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 612721
Forged AL6061-T6 alloy construction 31.8mm clamp diameter 4-bolt faceplate 180mm long quill Matte finish with laser etched … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
15% offretail $39.99 your price $33.99
BuyPART NUM 612721 
Salsa Guide Stem 90mm 31.8 +/-6 degree Black BuyPART NUM 333149
The Guide Stem is lightweight, reliable, and provides excellent steering response on the road or trail. Bead-blasted, then anodized, finish … read more
10% offretail $40.00 Ends 10/8! $36.00 + ships free
BuyPART NUM 333149 
"At Salsa, we believe a sense of adventure makes life better. The bicycle can be so much more than just a bike; it's a path to new places, new people, and amazing experiences."
"Ritchey bicycle components have been raced to victory in some of the biggest cycling competitions in the world including the UCI World Championships, the Tour de France and the Olympics and it all began in a simple garage in Menlo Park, California with Tom Ritchey.'
"The world's best choose Cane Creek. A key element of Cane Creek's mission is to support the sport of cycling, including racing, charitable activities and cycling advocacy. Cane Creek believes strongly in the power of bicycles and their potential to effect positive change in our society. To that end, Cane Creek supports athletes and teams whose purpose encompasses more than competitive racing, such as getting more people on bikes, improving or promoting a healthy lifestyle, and making our world better through the use of a bike."
Thomson is leading with innovative design for two primary markets - aerospace and cycling.
Dimension makes quality components to repair or custom-fit the vast majority of bikes being ridden today, and provide the accessories that make them fun to ride.
"Whisky Parts Co. makes high quality carbon components designed with unique features that help you do more with your bike and stand out from the rest. We believe that our work can help every rider find a new level of confidence and performance with our sturdy and lightweight forks, bars, rims and more. So whether you are building a new bike or upgrading one you already have, you'll find an uncommon attention to detail in every product we offer."
"We move forward with a desire to deliver the best possible components to our customers and a determined spirit of competition."
"Every year bikes change, styles and trends evolve, old bikes are in need of repairs and new bikes are waiting for that personal touch. We provide the means to keep your bike on the road and fun to ride!"
We define color as the main color of the item. It may have accents or highlights in other colors.
In Store products are available to view in our showroom. In Store orders usually ship the same or next business day.
These models are available for online purchasing and can be shipped directly to you.
Bar clamp diameter is the diamater of the handlebar.
Stem length is measured from the center of one clamp to the center of the other clamp. This measurement is sometimes known as the reach or extension.
S.H.I.S clamp diameter is the steerer tube diameter.
Stem angles are measured perpendicular to the clamp. For example, a 90 degree stem is straight. Sometimes, this may also be refered to as a 0 degree stem. If two measurements are listed, the stem can be flipped for angling up or down.
Stem Type
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