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31.8- mm 90 deg Bicycle Stems

Bar clamp diameter is the diamater of the handlebar.

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.

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Showing 194 products:

Thomson X4 Mountain 31.8 50mm 90 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 50mm 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 ( 1 ) 4 of 5 stars ( 1 review )

your price $114.95 + ships free

BuyBuyPART NUM 534897
Spank Spike Race 2 Stem - 35mm 0 Degree Alloy Black
Spank Spike Race 2 Stem - 35mm 0 Degree Alloy Black

Spank's Spike stem is among the shortest available to better fit the latest generation of super long bikes and super wide bars. Included Snap-Fit … read more

your price $49.90 + ships free

BuyBuyPART NUM 189731
TruVativ Hussefelt Stem 60mm 0deg  31.8 1-1/8  Black
TruVativ Hussefelt Stem 60mm 0deg 31.8 1-1/8 Black

TruVativ Hussefelt Mountain Stems feature forged 6061-T6 aluminum construction. Forged AL-6061-T6 construction Height = 50mm, 315 grams for 60mm … read more

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

your price $29.00

BuyBuyPART NUM 901874
Thomson X4 Mountain 31.8 90mm 90 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 90mm 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 ( 1 ) 4 of 5 stars ( 1 review )

your price $114.95 + ships free

BuyBuyPART NUM 788193
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 ( 1 ) 4 of 5 stars ( 1 review )

your price $114.95 + ships free

BuyBuyPART NUM 672763
Thomson Direct Mount Stem 50mm Black
Thomson Direct Mount Stem 50mm BlackThomson

Thomson Direct Mount Stems Item Specifications Color: Black Intended Use: Mountain Bar Clamp Diameter: 31.8mm Stem Angle: 90deg Stem Length: 50mm … read more

your price $114.95 + ships free

BuyBuyPART NUM 325533
Kalloy Uno Advanced Project Stem, 31.8 x 0d x 35mm, Black
Kalloy Uno Advanced Project Stem, 31.8 x 0d x 35mm, Black

Lightweight 3D forged 6061-T6 aluminum 4-bolt faceplate Opposing 2-bolt steerer clamp stack height = 40mm 125g (45mm) … read more

your price $16.99

BuyBuyPART NUM 259647
Salsa Guide Trail Stem- 40mm, 31.8 Clamp, 0 Degree, 1 1/8", Aluminum, Black
Salsa Guide Trail Stem- 40mm, 31.8 Clamp, 0 Degree, 1 1/8", Aluminum, BlackSalsa

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

your price $40.00 + ships free

BuyBuyPART NUM 139349
Salsa Guide Trail Stem- 60mm, 31.8 Clamp, 0 Degree, 1 1/8", Aluminum, Black
Salsa Guide Trail Stem- 60mm, 31.8 Clamp, 0 Degree, 1 1/8", Aluminum, BlackSalsa

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

your price $40.00 + ships free

BuyBuyPART NUM 151072
Salsa Guide Trail Stem- 70mm, 31.8 Clamp, 0 Degree, 1 1/8", Aluminum, Black
Salsa Guide Trail Stem- 70mm, 31.8 Clamp, 0 Degree, 1 1/8", Aluminum, BlackSalsa

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

your price $40.00 + ships free

BuyBuyPART NUM 451578
Salsa Guide Trail Stem- 50mm, 31.8 Clamp, 0 Degree, 1 1/8", Aluminum, Black
Salsa Guide Trail Stem- 50mm, 31.8 Clamp, 0 Degree, 1 1/8", Aluminum, BlackSalsa

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

your price $40.00 + ships free

BuyBuyPART NUM 540072
Spank Oozy Trail 2 Stem, 31.8mm x 50mm, 0 Degrees, Black
Spank Oozy Trail 2 Stem, 31.8mm x 50mm, 0 Degrees, Black

Burly 31.8mm bar clamp zone is chamfered to reduce stress risers and increase fatigue life in handelbars Iconic hourglass sectional profile … read more

your price $49.99 + ships free

BuyBuyPART NUM 237839
Whisky No.7 MTN Stem 60mm 31.8 0 Degree Black
Whisky No.7 MTN Stem 60mm 31.8 0 Degree BlackWhisky Parts Co.

No.7 Mountain stems offer a stout connection for modern mountain bars. They match the simple aesthetic of other Whisky cockpit components.  3D-forged … read more

your price $40.00 + ships free

BuyBuyPART NUM 712705
Kalloy Uno Advanced Project Stem, 31.8 x 0d x 55mm, Black
Kalloy Uno Advanced Project Stem, 31.8 x 0d x 55mm, Black

Lightweight 3D forged 6061-T6 aluminum 4-bolt faceplate Opposing 2-bolt steerer clamp stack height = 40mm 125g (45mm) … read more

your price $16.99

BuyBuyPART NUM 651925
Spank Oozy Trail 2 Stem, 31.8mm x 50mm, 0 Degrees, Blue
Spank Oozy Trail 2 Stem, 31.8mm x 50mm, 0 Degrees, Blue

Burly 31.8mm bar clamp zone is chamfered to reduce stress risers and increase fatigue life in handelbars Iconic hourglass sectional profile … read more

your price $49.99 + ships free

BuyBuyPART NUM 290352
Box One Top Load Stem, 60mm x 31.8mm x 28.6, Black
Box One Top Load Stem, 60mm x 31.8mm x 28.6, Black

45 degree top loading design with a 31.8mm clamp for use with any standard MTB bar and over sized BMX bars Constructed from 6061-T6 aluminum … read more

your price $69.99 + ships free

BuyBuyPART NUM 720522
Thomson X4 Mountain 31.8 70mm 90 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 70mm 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 ( 1 ) 4 of 5 stars ( 1 review )

your price $114.95 + ships free

BuyBuyPART NUM 541817
Box One Top Load Stem, 48mm x 31.8mm x 28.6mm, Blue
Box One Top Load Stem, 48mm x 31.8mm x 28.6mm, Blue

45 degree top loading design with a 31.8mm clamp for use with any standard MTB bar and over sized BMX bars Constructed from 6061-T6 aluminum … read more

your price $69.99 + ships free

BuyBuyPART NUM 206793
Box One Top Load Stem, 53mm x 31.8mm x 28.6mm, Red
Box One Top Load Stem, 53mm x 31.8mm x 28.6mm, Red

45 degree top loading design with a 31.8mm clamp for use with any standard MTB bar and over sized BMX bars Constructed from 6061-T6 aluminum … read more

your price $69.99 + ships free

BuyBuyPART NUM 576594
Thomson X4 80mm 90d 31.8 Black
Thomson X4 80mm 90d 31.8 BlackThomson

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 ( 1 ) 4 of 5 stars ( 1 review )

your price $114.95 + ships free

BuyBuyPART NUM 755644
Thomson

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

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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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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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Answer

Answer BMX makes BMX racing components.

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Kind Shock

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

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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

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