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50 mm 28.6 31.8 mm 90 deg Bicycle Stems

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.

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 32 products:

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

Green31.8 mm50 mm28.690 degThreadless
In StoreIn Store

your price $59.99

BuyBuyPART NUM 278227
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 )
Black31.8 mm50 mm28.690 degThreadless
popularpopularShips FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 534897
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

Black31.8 mm50 mm28.690 degThreadless
Lowest PriceLowest PriceShips FreeShips Free

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

Black31.8 mm50 mm28.690 degThreadless
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your price $99.99 + ships free

BuyBuyPART NUM 720812
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

Black31.8 mm50 mm28.690 degThreadless
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your price $45.00 + ships free

BuyBuyPART NUM 540072
Thomson X4 Mountain 31.8 50mm 90 Degrees Silver 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 50mm 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 )
Silver31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 465413
Spank Spike Race 2 Stem, 31.8 x 50mm, Red
Spank Spike Race 2 Stem, 31.8 x 50mm, Red

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

Red31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

your price $59.99 + ships free

BuyBuyPART NUM 162778
TruVativ Holzfeller Stem 50mm 0deg 31 .8 1-1/8 Blast Black
TruVativ Holzfeller Stem 50mm 0deg 31 .8 1-1/8 Blast Black

TruVativ Holzfeller Mountain Stems are constructed of forged 66 aluminum. Forged AL-66 construction Height = 50mm, 290 grams for 60mm Item Specifications … read more

Black31.8 mm50 mm28.690 degThreadless
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your price $62.00 + ships free

BuyBuyPART NUM 278253
RaceFace Atlas Stem Blue 50mm x 31.8
RaceFace Atlas Stem Blue 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

Blue31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

15% offretail $99.99 your price $84.99 + ships free

BuyBuyPART NUM 191283
Paul Components Boxcar Stem, (31.8) 0d X 50mm - Silver
Paul Components Boxcar Stem, (31.8) 0d X 50mm - Silver

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

Silver31.8 mm50 mm28.690 degThreadless
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your price $147.50 + ships free

BuyBuyPART NUM 284830
Origin8 Fix8 OS Stem, 1-1/8x50x31.8, Black
Origin8 Fix8 OS Stem, 1-1/8x50x31.8, Black

AL6061 3D forged aluminum construction 4 bolt front loading design EN MTN safety certified Type: Mountain Threadless Fork … read more

Black31.8 mm50 mm28.690 degThreadless
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15% offretail $57.99 your price $49.29 + ships free

BuyBuyPART NUM 523981
Spank Spike Race 2 Stem, 31.8 x 50mm, Blue
Spank Spike Race 2 Stem, 31.8 x 50mm, Blue

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

Blue31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

your price $59.99 + ships free

BuyBuyPART NUM 667386
Spank Spike Race 2 Stem, 31.8 x 50mm, Black
Spank Spike Race 2 Stem, 31.8 x 50mm, Black

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

Black31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

your price $59.99 + ships free

BuyBuyPART NUM 374863
Thomson Elite X4 Mountain Stem - 50mm, 35mm, 0 Degree, Aluminum, Black
Thomson Elite X4 Mountain Stem - 50mm, 35mm, 0 Degree, Aluminum, 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

Black31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

$11 offretail $114.95 your price $103.45 + ships free

BuyBuyPART NUM 299885
RaceFace Atlas Stem Red 50mm x 31.8
RaceFace Atlas Stem Red 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

Red31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

15% offretail $99.99 your price $84.99 + ships free

BuyBuyPART NUM 562413
Truvativ Descendant 50mm 31.8mm Clamp 1-1/8" Stem Black
Truvativ Descendant 50mm 31.8mm Clamp 1-1/8" Stem Black

Item Specifications Color: Black S.H.I.S. Stem Clamp Diameter: 28.6 Bar Clamp Diameter (mm): 31.8 Length: 50 … read more

Black31.8 mm50 mm28.690 degThreadless
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6% offretail $65.00 your price $60.99 + ships free

BuyBuyPART NUM 945504
Gusset S2 AM Stem, 31.8 x 50mm, Black
Gusset S2 AM Stem, 31.8 x 50mm, Black

CNC 7075 alloy stem 0 degree rise Item Specifications steerer dia.: 1-1/8" bar dia.: 31.8mm rise: 0 deg … read more

Black31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

your price $99.00 + ships free

BuyBuyPART NUM 413040
Chromag HiFi Version 2 Stem: 50mm 31.8mm 1-1/8 +/- 0 degree Black
Chromag HiFi Version 2 Stem: 50mm 31.8mm 1-1/8 +/- 0 degree Black

HiFi V2 stems are forged and designed to be light and durable. Featuring a variety of clamp sizes and lengths, the HiFi V2 is the perfect complement … read more

Black31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

10% offretail $94.00 your price $84.60 + ships free

BuyBuyPART NUM 717933
Deity Copperhead 50mm 31.8 Stem, Silver
Deity Copperhead 50mm 31.8 Stem, Silver

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

SIlver31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

your price $104.99 + ships free

BuyBuyPART NUM 693175
KS Ether Stem, 31.8 x 50mm, 0 Degrees, Black
KS Ether Stem, 31.8 x 50mm, 0 Degrees, BlackKind Shock

Forged and CNC machined aluminum with black on black graphics KS's tuned flex system offers the perfect balance of comfort and control when … read more

Black31.8 mm50 mm28.690 degThreadless
Ships FreeShips Free

10% offretail $65.00 your price $58.50 + ships free

BuyBuyPART NUM 635187
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.

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

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.

Stem Type

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