31.8 mm Bicycle Stems
Bar clamp diameter is the diamater of the handlebar.
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Showing 1108 products:
Ritchey Comp 4-Axis Stem - 80 mm, 31.8 Clamp, +30, 1 1/8", Alloy, Black
BuyPART NUM 756913
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
In Store
Ritchey 31035317045your price $44.95
BuyPART NUM 756913 
Salsa Guide Stem 70mm 31.8 +/-6 degree Black
5 of 5
( 1 )
5 of 5 stars
( 1 review )
BuyPART NUM 837061
The Guide Stem is lightweight, reliable, and provides excellent steering response on the road or trail. Bead-blasted, then anodized, finish … read more
5 of 5
( 1 )
5 of 5 stars
( 1 review )
Ships Freeyour price $40.00 + ships free
BuyPART NUM 837061 
Paul Component Engineering Boxcar Stem, 70mm +/- 15 degree 31.8mm 1-1/8" Threadless Black BuyPART NUM 789584
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
Lowest Priceyour price $147.50 + ships free
BuyPART NUM 789584 
Renthal Duo Stem: 50mm 100d AluGold/Black 31.8
4 of 5
( 2 )
4 of 5 stars average
( 2 reviews )
BuyPART NUM 235686
CNC machined from 6082 T6 aluminium alloy U-shape cradle clamp eliminates handlebar stress risers found with traditional stems Made in Cheshire … read more
4 of 5
( 2 )
4 of 5 stars average
( 2 reviews )
your price $132.95 + ships free
BuyPART NUM 235686 
Ritchey Trail Stem - 45 mm, 31.8 Clamp, +/-0, 1 1/8", Alloy, Black BuyPART NUM 303891
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 $44.95 + ships free
BuyPART NUM 303891 
Velo Orange Happy Stem - 31.8mm Clamp, 110mm, Polished BuyPART NUM 275887
Velo Orange Happy Stem. A polished threadless stem with a 45 degree angle to keep your back and wallet happy. At least 37mm of steerer is required … read more
10% offretail $46.00 Ends 6/30! $41.40 + ships free
BuyPART NUM 275887 
Ritchey WCS C220 Stem - 90mm, 31.8mm, -6 Degree, Aluminum, Matte Black BuyPART NUM 509818
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
4% offretail $99.95 Ends 5/29! $95.95 + ships free
BuyPART NUM 509818 
Cinelli Pista 6061-T6 Stem, (31.8) 65d X 120mm - Black BuyPART NUM 829920
Forged and machined 6061-T6 aluminum construction with 4-bolt removable faceplate Twin, opposed-direction steerer clamp bolts Matte … read more
your price $29.99
BuyPART NUM 829920 
Cinelli Pista 6061-T6 Stem, (31.8) 65d X 130mm - Black BuyPART NUM 313516
Forged and machined 6061-T6 aluminum construction with 4-bolt removable faceplate Twin, opposed-direction steerer clamp bolts Matte … read more
your price $28.97
BuyPART NUM 313516 
Spank Spike Race 2 Stem, 31.8 x 50mm, 0d, Green BuyPART NUM 278227
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
BuyPART NUM 278227 
Zipp Service Course Stem, 31.8mm x 130mm, 1-1/8', 6 degree, Silver BuyPART NUM 195773
Increased stiffness-to-weight ratio 6061 alloy Steel hardware Bead Blast black finish Item Specifications … read more
your price $56.00 + ships free
BuyPART NUM 195773 
Deity Copperhead 50mm 31.8 Stem Orange BuyPART NUM 661200
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
BuyPART NUM 661200 
Box One Front Load Stem, 48mm x 31.8mm x 28.6mm, Black BuyPART NUM 697072
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
BuyPART NUM 697072 
Ritchey WCS C220 Stem - 120mm, 31.8mm, -6 Degree, Aluminum, Matte Black BuyPART NUM 376377
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
4% offretail $99.95 Ends 5/29! $95.95 + ships free
BuyPART NUM 376377 
Promax DA-1 Stem 120mm +/- 7 Degree 1-1/8 Threadless Blue BuyPART NUM 619124
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
33% offretail $36.00 your price $23.99 + ships free
BuyPART NUM 619124 
Ritchey C-260 Superlogic Carbon Stem 
Choose
Ritchey Stems Matte UD carbon Stack: 42mm Item Specifications Color: Black Weight: 125g Intended Use: Road Bar Clamp Diameter: 31.8mm Stem … read more
$44 offretail $299.95 $254.96 to $260.96 + ships free
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Paul Components Boxcar Stem - 31.8 x 70mm, Black BuyPART NUM 437421
The perfect combination of stiffness and strength at a reasonable weight Made with US sourced 2024 aircraft alloy All screws are high … read more
your price $147.50 + ships free
BuyPART NUM 437421 
Zipp Service Course Stem, 31.8mm x 90mm, 1-1/8', 25 degree, Silver BuyPART NUM 748924
Increased stiffness-to-weight ratio 6061 alloy Steel hardware Bead Blast black finish Item Specifications … read more
your price $56.00 + ships free
BuyPART NUM 748924 
Ritchey Comp 4-Axis Stem - 60 mm, 31.8 Clamp, +30, 1 1/8", Alloy, Black
5 of 5
( 4 )
5 of 5 stars average
( 4 reviews )
BuyPART NUM 960951
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
5 of 5
( 4 )
5 of 5 stars average
( 4 reviews )
your price $44.95
BuyPART NUM 960951 
Origin8 Everland MX/GX 40 degree Stem, 60x31.8, Black BuyPART NUM 687703
High angle stems ideal for Monstercross or Gravel bikes equipped with off-road drop bars Raises drop bars eliminating the need for excessive … read more
15% offretail $43.99 your price $37.39 + ships free
BuyPART NUM 687703 
"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.'
"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."
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.
"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."
"We move forward with a desire to deliver the best possible components to our customers and a determined spirit of competition."
Thomson is leading with innovative design for two primary markets - aerospace and cycling.
"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!"
"The world's best choose Cane Creek. A key element of Cane Creek's mission is to support the sport of cycling, including racing, charitable activities and cycling advocacy. Cane Creek believes strongly in the power of bicycles and their potential to effect positive change in our society. To that end, Cane Creek supports athletes and teams whose purpose encompasses more than competitive racing, such as getting more people on bikes, improving or promoting a healthy lifestyle, and making our world better through the use of a bike."
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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