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28.6 31.8 mm Bicycle Stems

S.H.I.S clamp diameter is the steerer tube diameter.

Bar clamp diameter is the diamater of the handlebar.

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Showing 920 products:

Renthal Duo Stem: 50mm 100d AluGold/Black 31.8
Renthal Duo Stem: 50mm 100d AluGold/Black 31.8

CNC machined from 6082 T6 aluminium alloy U-shape cradle clamp eliminates handlebar stress risers found with traditional stems Made in Cheshire … read more

StarStarStarStarStar 4 of 5 ( 2 ) 4 of 5 stars average ( 2 reviews )

your price $132.95 + ships free

BuyBuyPART NUM 235686
Kalloy Uno Upshot Stem, (31.8) 35d X 110mm Black
Kalloy Uno Upshot Stem, (31.8) 35d X 110mm Black

Lightweight high rise 2D forged aluminum stem for comfort 4-bolt windowed faceplate, 40mm tall steerer clamp. Approximate weight: 160g … read more

your price $13.99

BuyBuyPART NUM 801402
Gusset S2 AM Stem, 31.8 x 30mm, 1-1/8", Black
Gusset S2 AM Stem, 31.8 x 30mm, 1-1/8", Black

BTI Part Number: GU-6526 Vendor Part Number: ASGU2A23K Steerer Diameter: 1-1/8" Bar Diameter: 31.8 Rise: 0 Degrees … read more

your price $99.00 + ships free

BuyBuyPART NUM 335355
Cane Creek eeSilk Stem - 80mm, 31.8mm, +6/-6, 1 1/8", Alloy, Black
Cane Creek eeSilk Stem - 80mm, 31.8mm, +6/-6, 1 1/8", Alloy, BlackCane Creek

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

BuyBuyPART NUM 460795
Ritchey Classic C220 Stem 31.8mm +/- 6 degree HP Silver
Ritchey Classic C220 Stem 31.8mm +/- 6 degree HP SilverRitchey

C220 with forward facing bolt design for easy installation Coated chromoly hardware Item Specifications Color: Silver Bar Clamp … read more

your price $79.95 + ships free

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Box One Front Load Stem, 48mm x 31.8mm x 28.6mm, Black
Box One Front Load Stem, 48mm x 31.8mm x 28.6mm, Black

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

BuyBuyPART NUM 697072
Genetic Juzzi 2-Axis Adjustable Road Stem, (31.8) 120mm
Genetic Juzzi 2-Axis Adjustable Road Stem, (31.8) 120mm

Adjustable 7050 alloy road stem 2-axis pivoting system for setting ideal rise and reach Item Specifications steerer dia.: 1-1/8" … read more

14% offretail $69.95 your price $59.99 + ships free

BuyBuyPART NUM 671000
Deity Copperhead 50mm 31.8 Stem Orange
Deity Copperhead 50mm 31.8 Stem Orange

Even lighter than the Cavity stem Machined from 6061 T6 aluminum Short 30mm stack height and 55mm wide faceplate for increased stiffness … read more

your price $104.99 + ships free

BuyBuyPART NUM 661200
Spank Spike Race 2 Stem, 31.8 x 50mm, 0d, Green
Spank Spike Race 2 Stem, 31.8 x 50mm, 0d, Green

2D forged MGR alloy is CNC weight optimized Chamfered bar clamps reduce stress risers in the critical bar/stem interface Shotpeen anodized … read more

your price $59.99

BuyBuyPART NUM 278227
Zipp Service Course Stem, 31.8mm x 130mm, 1-1/8', 6 degree, Silver
Zipp Service Course Stem, 31.8mm x 130mm, 1-1/8', 6 degree, Silver

Increased stiffness-to-weight ratio 6061 alloy Steel hardware Bead Blast black finish Item Specifications … read more

your price $56.00 + ships free

BuyBuyPART NUM 195773
ProTaper Stem 31.8 x 30mm, 28.6, Stealth Black
ProTaper Stem 31.8 x 30mm, 28.6, Stealth Black

3D forged and machined 6061 alloy construction A2 stainless Torx bolts Item Specifications steerer dia.: 1-1/8" bar dia.: 31.8mm … read more

your price $104.99 + ships free

BuyBuyPART NUM 590926
Thomson X4 Mountain 31.8 130mm 90 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 130mm 90 Degrees Black 1-1/8" Threadless StemThomson

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

StarStarStarStarStar 4 of 5 ( 2 ) 4 of 5 stars average ( 2 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 724444
Ritchey C-260 Superlogic Carbon Stem
Ritchey C-260 Superlogic Carbon StemRitchey

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
Paul Components Boxcar Stem - 31.8 x 70mm, Black

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

BuyBuyPART NUM 437421
Zipp Service Course Stem, 31.8mm x 90mm, 1-1/8', 25 degree, Silver
Zipp Service Course Stem, 31.8mm x 90mm, 1-1/8', 25 degree, Silver

Increased stiffness-to-weight ratio 6061 alloy Steel hardware Bead Blast black finish Item Specifications … read more

your price $56.00 + ships free

BuyBuyPART NUM 748924
Origin8 Everland MX/GX 40 degree Stem, 60x31.8, Black
Origin8 Everland MX/GX 40 degree Stem, 60x31.8, Black

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

BuyBuyPART NUM 687703
Origin8 Throwdown MTB Stem, 35x31.8x28.6, Black
Origin8 Throwdown MTB Stem, 35x31.8x28.6, Black

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

BuyBuyPART NUM 238226
Dimension Threadless Road Stem: 70mm; 125 Degree; Black; 1-1/8"; 31.8
Dimension Threadless Road Stem: 70mm; 125 Degree; Black; 1-1/8"; 31.8Dimension

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

StarStarStarStarStar 4.8 of 5 ( 23 ) 4.8 of 5 stars average ( 23 reviews )

your price $39.00 + ships free

BuyBuyPART NUM 481683
Origin8 Everland MX/GX 40 degree Stem, 130x31.8, Black
Origin8 Everland MX/GX 40 degree Stem, 130x31.8, Black

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

BuyBuyPART NUM 654374
Dimension Trail Stem - 35mm, 31.8mm, +/- 6 Degree, Aluminum, Black
Dimension Trail Stem - 35mm, 31.8mm, +/- 6 Degree, Aluminum, Black Dimension

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

StarStarStarStarStar 5 of 5 ( 1 ) 5 of 5 stars ( 1 review )

your price $36.99 + ships free

BuyBuyPART NUM 912898
Cane Creek

"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."

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Ritchey

"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.'

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Thomson

Thomson is leading with innovative design for two primary markets - aerospace and cycling.

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Dimension

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.

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Salsa

"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."

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Whisky Parts Co.

"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."

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Full Speed Ahead

"We move forward with a desire to deliver the best possible components to our customers and a determined spirit of competition."

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Industry Nine

"Industry Nine hubs are handmade in Asheville, NC"

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Kind Shock

Kind Shock is an industry leader in suspension and dropper seat posts.

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Syntace

"Strong. Light. Smart."

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Atomlab

"Built for Race"

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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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