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31.8 mm 50 mm Bicycle Stems

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.

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Showing 108 products:

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
Deity Copperhead 50mm 31.8 Stem Orange
Deity Copperhead 50mm 31.8 Stem Orange

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

your price $104.99 + ships free

BuyBuyPART NUM 661200
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 $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 )

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

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
Renthal Apex Stem: 31.8, 1-1/8, 50mm Reach, +/- 6 degree
Renthal Apex Stem: 31.8, 1-1/8, 50mm Reach, +/- 6 degree

Renthal Apex Stems. The Renthal Apex combines All Mountain strength, Enduro stiffness and XC lightweight that makes this stem the perfect choice for any … read more

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

your price $140.45 + ships free

BuyBuyPART NUM 173979
DMR Defy2 Stem, (31.8) 5d X 50mm - Black
DMR Defy2 Stem, (31.8) 5d X 50mm - Black

CNC machined 6061 aluminum stem, ideal for All Mountain and Trail use Internal steerer clamp with low stack height (31mm) Super wide … read more

your price $82.00 + ships free

BuyBuyPART NUM 579856
Paul Component Engineering Boxcar Stem, 50mm +/- 0 degree 31.8mm 1-1/8" Threadless Black
Paul Component Engineering Boxcar Stem, 50mm +/- 0 degree 31.8mm 1-1/8" Threadless Black

Paul Component Engineering Boxcar Stem, 50mm +/- 0 degree 31.8mm 1-1/8" Threadless Black Item Specifications Color: Black Weight: 137 Length: 50 … read more

your price $147.50 + ships free

BuyBuyPART NUM 154649
Industry Nine, A318, Stem, Diameter: 31.8mm, Length: 50mm, Steerer: 1-1/8'', 5 degree, Pink
Industry Nine, A318, Stem, Diameter: 31.8mm, Length: 50mm, Steerer: 1-1/8'', 5 degree, PinkIndustry Nine

Crafted from domestically-sourced 7075 aluminum billet 180 degrees of handlebar contact on the stem body for twist-free security that will … read more

your price $155.00 + ships free

BuyBuyPART NUM 579383
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 )

your price $114.95 + ships free

BuyBuyPART NUM 465413
Race Face Chester Stem: 50mm +/- 8 degree Black
Race Face Chester Stem: 50mm +/- 8 degree Black

Race Face Chester Stem: 50mm +/- 8 degree Black Item Specifications Color: Black Length: 50 Bar Clamp Diameter: 31.8 Stem Angle: +8 S.H.I.S. Stem … read more

your price $54.99 + ships free

BuyBuyPART NUM 790623
Burgtec Enduro MK3 Stem, (31.8) 0d X 50mm - Black
Burgtec Enduro MK3 Stem, (31.8) 0d X 50mm - Black

Updated version sheds weight and adds sleek lines CNC machined aluminum with internal steerer clamping system Extra tall 48mm stack … read more

your price $125.39 + ships free

BuyBuyPART NUM 314433
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

your price $59.99 + ships free

BuyBuyPART NUM 162778
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
Industry Nine A318 Stem, 31.8 x 50mm, +/-5d, Silver
Industry Nine A318 Stem, 31.8 x 50mm, +/-5d, SilverIndustry 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 376082
Easton Cycling EA50 Threadless Stem, 31.8 x 50mm, 1-1/8", +/-7d, Black
Easton Cycling EA50 Threadless Stem, 31.8 x 50mm, 1-1/8", +/-7d, Black

Forged EA50 alloy for toughness Patented DST distributes clamping forces over a larger area Clamp diameter: 31.8mm Weight: 160g … read more

your price $44.99

BuyBuyPART NUM 184459
Industry Nine A318 Stem, 31.8 x 50mm, +/-5d,  Red
Industry Nine A318 Stem, 31.8 x 50mm, +/-5d, RedIndustry 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 280951
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

your price $62.00 + ships free

BuyBuyPART NUM 278253
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

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.

Industry Nine

"Industry Nine hubs are handmade in Asheville, NC"

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Kind Shock

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

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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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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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We define color as the main color of the item. It may have accents or highlights in other colors.

These products are one of our best sellers.

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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