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31.8 mm Bicycle Stems

Bar clamp diameter is the diamater of the handlebar.

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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 ( 1 ) 5 of 5 stars ( 1 review )

your price $44.95

BuyBuyPART NUM 960951
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 $34.99 your price $29.75

BuyBuyPART NUM 354468
FSA V-Drive MTB Stem, 60mm, +/-17, 31.8, Black
FSA V-Drive MTB Stem, 60mm, +/-17, 31.8, BlackFull Speed Ahead

3D forged and CNC machined AL6061/T6 4-bolt cold-forged alloy faceplate Chromoly hardware 40mm fork clamp stack height … read more

your price $31.99

BuyBuyPART NUM 958238
Ritchey Comp 4-Axis Stem - 110 mm, 31.8 Clamp, +30, 1 1/8", Alloy, Black
Ritchey Comp 4-Axis Stem - 110 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

your price $44.95

BuyBuyPART NUM 917853
Ritchey Adjustable 4-Axis Stem
Ritchey Adjustable 4-Axis StemRitchey

+/-55 degree range of height adjustability Stainless bar and stem clamp bolts Item Specifications Weight: 270 Bar … read more

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

your price $54.95

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Velo Orange Cigne Stem - 31.8mm Clamp, 90mm, Black
Velo Orange Cigne Stem - 31.8mm Clamp, 90mm, Black

Velo Orange Cigne Stem gets its name from the French word for swan. The shape is inspired by the old gooseneck LD stems by Ibis and Cunningham, but with … read more

your price $85.00 + ships free

BuyBuyPART NUM 174646
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
Thomson X4 Stem Mountain 31.8 60mm 90 Degrees Black 1-1/8" Threadless
Thomson X4 Stem Mountain 31.8 60mm 90 Degrees Black 1-1/8" ThreadlessThomson

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 )

$29 offretail $114.95 your price $84.98 + ships free

BuyBuyPART NUM 327291
Dimension Threadless Stem: 90mm; 125 Degree; 31.8; Silver
Dimension Threadless Stem: 90mm; 125 Degree; 31.8; SilverDimension

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 ( 20 ) 4.8 of 5 stars average ( 20 reviews )

your price $34.99 + ships free

BuyBuyPART NUM 441662
Ritchey Comp 4Axis-44 Stem - 130mm, 31.8mm, +17/-17, 1 1/4", Alloy, Matte Black
Ritchey Comp 4Axis-44 Stem - 130mm, 31.8mm, +17/-17, 1 1/4", Alloy, Matte BlackRitchey

Ritchey Comp 4Axis-44 stems. Item Specifications S.H.I.S. Stem Clamp Diameter: 31.8 Bar Clamp Diameter (mm): 31.8 Stem Angle … read more

your price $37.95

BuyBuyPART NUM 459579
FSA V-Drive Stem - 60mm 31.8mm +/- 6 Degree Alloy Black
FSA V-Drive Stem - 60mm 31.8mm +/- 6 Degree Alloy BlackFull Speed Ahead

3D forged and CNC machined AL6061/T6 mountain bike stem. 4-bolt cold-forged alloy faceplate Chromoly hardware Item Specifications … read more

your price $31.99 + ships free

BuyBuyPART NUM 557170
Velo Orange Cigne Stem, 31.8 x145 x 90mm, High Polish Silver
Velo Orange Cigne Stem, 31.8 x145 x 90mm, High Polish Silver

Enables handlebars to be placed in a higher position without the use of a ton of spacers Functions as both a stem and top cap. Star nut should … read more

your price $95.00 + ships free

BuyBuyPART NUM 552502
Paul Components Boxcar Stem, (31.8) 15d X 70mm - Silver
Paul Components Boxcar Stem, (31.8) 15d X 70mm - Silver

The perfect combination of stiffness, strength, and reasonable weight Made with US sourced 2024 aircraft alloy All screws are high … read more

your price $147.50 + ships free

BuyBuyPART NUM 498721
Paul Components Boxcar Stem (31.8) 15d X 90mm - Silver
Paul Components Boxcar Stem (31.8) 15d X 90mm - Silver

The perfect combination of stiffness, strength, and reasonable weight Made with US sourced 2024 aircraft alloy All screws are high … read more

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

your price $147.50 + ships free

BuyBuyPART NUM 337356
Industry Nine A318 Stem, 31.8 x 50mm, +/-5d, Turquoise
Industry Nine A318 Stem, 31.8 x 50mm, +/-5d, TurquoiseIndustry Nine

7075 domestically sourced aluminum is machined, anodized and assembled in North Carolina 180 degree clamp wrap with high strength 316 stainless … read more

your price $145.00 + ships free

BuyBuyPART NUM 159408
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 $89.95 + ships free

BuyBuyPART NUM 509818
Ritchey WCS C220 Stem - 110mm, 31.8mm, -6 Degree, Aluminum, Matte Black
Ritchey WCS C220 Stem - 110mm, 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 $89.95 + ships free

BuyBuyPART NUM 134352
Promax DA-1 Stem 120mm +/- 7 Degree 1-1/8 Threadless Blue
Promax DA-1 Stem 120mm +/- 7 Degree 1-1/8 Threadless Blue

The DA-1 XC mountain bike is 3D cold forged, then CNC machined from 6061-T6 aluminum to create a lightweight and strong stem. Item Specifications … read more

your price $36.00 + ships free

BuyBuyPART NUM 619124
Thomson X4 Mountain 31.8 130mm 100 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 130mm 100 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 623442
Thomson X4 Mountain 31.8 70mm 90 Degrees Silver 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 70mm 90 Degrees Silver 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 672763
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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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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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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Industry Nine

"Industry Nine hubs are handmade in Asheville, NC"

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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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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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Kind Shock

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

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fizik

fi'zi:k is a racing brand. It represents beauty, speed, passion, freedom for those who race against each other, race against the clock and for enthusiast cyclists around the world who identify with the feeling of the fire of competition.

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Syntace

"Strong. Light. Smart."

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Atomlab

"Built for Race"

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Sunlite

"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!"

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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

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

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