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Threadless 90 deg 31.8 mm Bicycle Stems

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.

Bar clamp diameter is the diamater of the handlebar.

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Showing 114 products:

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
RaceFace Atlas Stem Black 65mm x 31.8
RaceFace Atlas Stem Black 65mm x 31.8

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

BuyBuyPART NUM 961881
Hope XC Stem - 70mm, 31.8 Clamp, +/-0, 1-1/8", Red
Hope XC Stem - 70mm, 31.8 Clamp, +/-0, 1-1/8", Red

Hope XC stem is optimised for the perfect balance of weight and stiffness. Gone are the days that XC meant noodly handling. Our new stem is designed … read more

your price $120.00 + ships free

BuyBuyPART NUM 639939
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
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 $45.99 + ships free

BuyBuyPART NUM 278227
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 + ships free

BuyBuyPART NUM 354468
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 )

$14 offretail $114.95 your price $99.99 + ships free

BuyBuyPART NUM 327291
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 ( 2 ) 4 of 5 stars average ( 2 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 534897
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 ( 2 ) 4 of 5 stars average ( 2 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 541817
TruVativ Hussefelt Stem 40mm 0deg 31.8 1-1/8  Black
TruVativ Hussefelt Stem 40mm 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 $43.00

BuyBuyPART NUM 251355
Whisky No.7 MTN Stem 40mm 31.8 0 Degree Black
Whisky No.7 MTN Stem 40mm 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 $48.00 + ships free

BuyBuyPART NUM 601487
Whisky No.7 MTN Stem 50mm 31.8 0 Degree Black
Whisky No.7 MTN Stem 50mm 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 $48.00 + ships free

BuyBuyPART NUM 816099
RaceFace Atlas Stem Black 50mm x 31.8
RaceFace Atlas Stem Black 50mm x 31.8

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

your price $99.99 + ships free

BuyBuyPART NUM 720812
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 ( 2 ) 4 of 5 stars average ( 2 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 788193
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 ( 2 ) 4 of 5 stars average ( 2 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 755644
Ritchey Trail Stem - 45 mm, 31.8 Clamp, +/-0, 1 1/8", Alloy, Black
Ritchey Trail Stem - 45 mm, 31.8 Clamp, +/-0, 1 1/8", Alloy, BlackRitchey

The Ritchey Trail Stem is the first Ritchey stem specifically designed for today's 5 to 6 inch travel trail bikes using wide bars. C220 with forward … read more

your price $49.95 + ships free

BuyBuyPART NUM 303891
Paul Component Engineering Boxcar Stem, 90mm +/- 0 degree 31.8mm 1-1/8" Threadless Black
Paul Component Engineering Boxcar Stem, 90mm +/- 0 degree 31.8mm 1-1/8" Threadless Black

Paul Component Engineering Boxcar Stem, 90mm +/- 0 degree 31.8mm 1-1/8" Threadless Black Item Specifications Color: Black Weight: 169 Length: 90 … read more

$18 offretail $147.50 your price $128.99 + ships free

BuyBuyPART NUM 118943
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
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 $59.99 + ships free

BuyBuyPART NUM 189731
Thomson Elite X4 Mountain Stem 40mm +/- 0 degree 31.8 1-1/8" Threadless
Thomson Elite X4 Mountain Stem 40mm +/- 0 degree 31.8 1-1/8" Threadless Thomson

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 751094
Thomson

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

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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."

See all Whisky Parts Co.

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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Kind Shock

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

See all Kind Shock

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.

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