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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All 689 products:
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 )
popular
In Store
Renthal STM100-BKAG
Three remaining at this price
Ships Freeyour price $132.95 + ships free
BuyPART NUM 235686 
Renthal Apex Stem: 31.8, 1-1/8, 31mm Reach, +/- 6 degree
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 111506
Renthal Apex Stems. The Renthal Apex combines All Mountain strength, Enduro stiffness and XC lightweight that makes this stem the perfect choice for any … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
your price $120.95 + ships free
BuyPART NUM 111506 
Ritchey Comp 4-Axis Stem - 120 mm, 31.8 Clamp, +30, 1 1/8", Alloy, Black
BuyPART NUM 132145
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
your price $54.95 + ships free
BuyPART NUM 132145 
Promax Impact BMX Stem - 60mm, Top Load, Black BuyPART NUM 680750
The Impact is a top-load BMX stem, cold forged from the highest quality 6061-T6 aluminum then CNC machined to refine the shape and further reduce weight. … read more
your price $49.99 + ships free
BuyPART NUM 680750 
Ritchey RL-1 4-Axis Stem (31.8mm Clamp, 50mm), Black BuyPART NUM 597223
With its unique faceplate design, the Ritchey 4-Axis stem was a game-changer when it was first released many years ago. Today, the OE 4-Axis-44 stem … read more
your price $32.95 + ships free
BuyPART NUM 597223 
Easton EA50 Stem - 100mm, 31.8mm, +/- 17 Degree, Alloy, Black BuyPART NUM 784109
Easton delivers quality and sound engineering all the way down to this family of entry-level stems. Top Lock Faceplate provides secure and safe … read more
your price $44.99 + ships free
BuyPART NUM 784109 
FSA K-Force OS-99 Carbon Stem 31.8x90mm
BuyPART NUM 159864
FSA (Full Speed Ahead) K-Force Light OS-99 Stems 3D forged and CNC machined from AL-2014 UD carbon weave skin applied through CSI process … read more
your price $186.20 + ships free
BuyPART NUM 159864 
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 Comp Switch Stem, (31.8) 84/6dx80 Matte BuyPART NUM 937332
Conceals internally routed cables, wires, and hydraulic lines from the handlebar into bicycle frames with straight 1.5" head tubes and tapered … read more
your price $87.95 + ships free
BuyPART NUM 937332 
Ritchey Comp 4-Axis Stem - 110 mm, 31.8 Clamp, +/-6, 1 1/8", Alloy, Black BuyPART NUM 742604
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
your price $52.95 + ships free
BuyPART NUM 742604 
RaceFace Atlas Stem Black 65mm x 31.8 BuyPART NUM 961881
RaceFace Atlas Stems Intended use is All Mountain, Freeride and Downhill 4-bolt bar clamp with interlocking u-shaped faceplate Opposing bolts on … read more
15% offretail $99.99 your price $84.99 + ships free
BuyPART NUM 961881 
Promax Gent 31.8mm Stem, Length 45mm, 1-1/8" Threadless Black BuyPART NUM 425732
Promax Gent Stem Item Specifications Bar Clamp Diameter (mm): 31.8 Color: Black Length: 45 Material: Aluminum S.H.I.S. Stem Clamp Diameter: 28.6 … read more
your price $31.99 + ships free
BuyPART NUM 425732 
Profile Design Aris Stem: 70MM; 65/115degree; Black; 1-1/8"; 31.8 BuyPART NUM 448740
Profile Design Aris Stems. Available for 26.0 & 31.8 3D forged 6061-T6 Aluminum Item Specifications Color: Black Intended Use: Road Steerer Tube: … read more
your price $42.00 + ships free
BuyPART NUM 448740 
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 $120.95 + ships free
BuyPART NUM 376377 
Thomson X4 Mountain 31.8 120mm 90 Degrees Black 1-1/8" Threadless Stem
4 of 5
( 2 )
4 of 5 stars average
( 2 reviews )
BuyPART NUM 967460
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 967460 
Deda Elementi Zero 2 Stem, 1-1/8", 31.8 x 110mm, +/-7d, Black BuyPART NUM 453511
3D forged and machined 6061 aluminum construction Stainless steel hardware with removable, 2-piece, 4-bolt aluminum faceplate Item … read more
your price $49.00 + ships free
BuyPART NUM 453511 
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 
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
$249.95 to $274.95 + ships free
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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 $54.95 + ships free
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
your price $49.99 + ships free
BuyPART NUM 687703 
"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.'
"We move forward with a desire to deliver the best possible components to our customers and a determined spirit of competition."
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.
"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."
"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."
"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."
"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.
These products are one of our best sellers.
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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