MenuMenuModern Bike

Threadless 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.

SortSort

Showing 761 products:

Salsa Guide Stem 100mm 31.8 +/-6 degree Black
Salsa Guide Stem 100mm 31.8 +/-6 degree BlackSalsa

The Guide Stem is lightweight, reliable, and provides excellent steering response on the road or trail. Bead-blasted, then anodized, finish … read more

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

10% offretail $40.00 Ends 10/8! $36.00 + ships free

BuyBuyPART NUM 703813
Paul Component Engineering Boxcar Stem, 70mm +/- 15 degree 31.8mm 1-1/8" Threadless Black
Paul Component Engineering Boxcar Stem, 70mm +/- 15 degree 31.8mm 1-1/8" Threadless Black

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

BuyBuyPART NUM 789584
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
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
Ritchey WCS C220 Stem - 90mm, 31.8mm, -6 Degree, Aluminum, Matte Black
Ritchey WCS C220 Stem - 90mm, 31.8mm, -6 Degree, Aluminum, Matte BlackRitchey

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

BuyBuyPART NUM 509818
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
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
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 WCS C220 Stem - 120mm, 31.8mm, -6 Degree, Aluminum, Matte Black
Ritchey WCS C220 Stem - 120mm, 31.8mm, -6 Degree, Aluminum, Matte BlackRitchey

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

BuyBuyPART NUM 376377
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

ChooseChoose
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
Ritchey Comp 4-Axis Stem - 60 mm, 31.8 Clamp, +30, 1 1/8", Alloy, Black
Ritchey Comp 4-Axis Stem - 60 mm, 31.8 Clamp, +30, 1 1/8", Alloy, BlackRitchey

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

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

your price $44.95

BuyBuyPART NUM 960951
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
Salsa Guide Stem 90mm 31.8 +/-6 degree Black
Salsa Guide Stem 90mm 31.8 +/-6 degree BlackSalsa

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

BuyBuyPART NUM 333149
Origin8 Flow 3D MTB Stem, 35x31.8x28.6 0d, Black
Origin8 Flow 3D MTB Stem, 35x31.8x28.6 0d, Black

3D forged AL6061-T6 alloy construction 40mm stack height 4 bolt front loading faceplate design ISO-Mountain safety certification … read more

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

15% offretail $51.99 your price $44.19

BuyBuyPART NUM 354468
Origin8 Everland MX/GX 25 degree Stem, 80x31.8, Black
Origin8 Everland MX/GX 25 degree Stem, 80x31.8, 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 617684
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."

See all Salsa

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.'

See all Ritchey

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."

See all Cane Creek

Thomson

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

See all Thomson

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.

See all Dimension

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."

See all Whisky Parts Co.

Full Speed Ahead

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

See all Full Speed Ahead

Industry Nine

"Industry Nine hubs are handmade in Asheville, NC"

See all Industry Nine

Kind Shock

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

See all Kind Shock

Syntace

"Strong. Light. Smart."

See all Syntace

Atomlab

"Built for Race"

See all Atomlab

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

Our Lowest Price - This product is ineligible for additional discounts or rebates.

This is the part number or identifier for this item from the manufacturer

These products are one of our best sellers.

Limited quantities remaining.

Buy this product and your entire order ships for free.

Some orders are inelligible for delivery discounts. See offer details for disqualifying products and destinations.