MenuMenuModern Bike

Threadless 31.8 mm 100 deg Black 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.

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

SortSort

Showing 15 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
Thomson X4 Mountain 31.8 100mm 100 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 100mm 100 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 626800
Thomson Elite X4 Mountain Stem 70mm 100 Degrees 31.8 1-1/8" Threadless Black
Thomson Elite X4 Mountain Stem 70mm 100 Degrees 31.8 1-1/8" Threadless BlackThomson

31.8 bar clamp diameter with smooth edges for carbon bar compatibility Machined 7000 series extruded bar stock Bolts are custom heat treated with … read more

StarStarStarStarStar 4 of 5 ( 2 ) 4 of 5 stars average ( 2 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 181963
Thomson X4 Mountain 31.8 90mm 100 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 90mm 100 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 647634
Thomson X4 Mountain 31.8 110mm 100 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 110mm 100 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 647349
Thomson X4 Mountain 31.8 120mm 100 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 120mm 100 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 178334
Thomson X4 Mountain 31.8 130mm 100 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 130mm 100 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 623442
Deity Cavity 35mm (31.8) Stem - Black
Deity Cavity 35mm (31.8) Stem - Black

Machined from 6061 T6 aluminum Short 33mm stack height and 55mm wide faceplate for increased stiffness with wide handlebars Features … read more

your price $99.99 + ships free

BuyBuyPART NUM 290694
Deity Cavity 50mm (31.8) Stem - Black
Deity Cavity 50mm (31.8) Stem - Black

Machined from 6061 T6 aluminum Short 33mm stack height and 55mm wide faceplate for increased stiffness with wide handlebars Features … read more

your price $99.99 + ships free

BuyBuyPART NUM 557745
Ritchey WCS Chicane Stem - 90 mm, 31.8 Clamp, +10, 1 1/8", Alloy, Black
Ritchey WCS Chicane Stem - 90 mm, 31.8 Clamp, +10, 1 1/8", Alloy, BlackRitchey

The WCS Chicane was designed for the needs of aero performance  when seconds are at stake. Hinged C220 clamp reduces front end drag while reducing stress … read more

Currently Sold Out

your price $104.95 + ships free

InfoInfo
Ritchey WCS Chicane Stem - 80 mm, 31.8 Clamp, +10, 1 1/8", Alloy, Black
Ritchey WCS Chicane Stem - 80 mm, 31.8 Clamp, +10, 1 1/8", Alloy, BlackRitchey

The WCS Chicane was designed for the needs of aero performance  when seconds are at stake. Hinged C220 clamp reduces front end drag while reducing stress … read more

Currently Sold Out

your price $104.95 + ships free

InfoInfo
Ritchey WCS Chicane Stem - 130 mm, 31.8 Clamp, +10, 1 1/8", Alloy, Black
Ritchey WCS Chicane Stem - 130 mm, 31.8 Clamp, +10, 1 1/8", Alloy, BlackRitchey

The WCS Chicane was designed for the needs of aero performance  when seconds are at stake. Hinged C220 clamp reduces front end drag while reducing stress … read more

Currently Sold Out

your price $104.95 + ships free

InfoInfo
Ritchey WCS Chicane Stem - 120 mm, 31.8 Clamp, +10, 1 1/8", Alloy, Black
Ritchey WCS Chicane Stem - 120 mm, 31.8 Clamp, +10, 1 1/8", Alloy, BlackRitchey

The WCS Chicane was designed for the needs of aero performance  when seconds are at stake. Hinged C220 clamp reduces front end drag while reducing stress … read more

Currently Sold Out

your price $104.95 + ships free

InfoInfo
Ritchey WCS Chicane Stem - 110 mm, 31.8 Clamp, +10, 1 1/8", Alloy, Black
Ritchey WCS Chicane Stem - 110 mm, 31.8 Clamp, +10, 1 1/8", Alloy, BlackRitchey

The WCS Chicane was designed for the needs of aero performance  when seconds are at stake. Hinged C220 clamp reduces front end drag while reducing stress … read more

Currently Sold Out

your price $104.95 + ships free

InfoInfo
Ritchey WCS Chicane Stem - 100 mm, 31.8 Clamp, +10, 1 1/8", Alloy, Black
Ritchey WCS Chicane Stem - 100 mm, 31.8 Clamp, +10, 1 1/8", Alloy, BlackRitchey

The WCS Chicane was designed for the needs of aero performance  when seconds are at stake. Hinged C220 clamp reduces front end drag while reducing stress … read more

Currently Sold Out

your price $104.95 + ships free

InfoInfo
Thomson

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

See all Thomson

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.'

See all Ritchey

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

Our Lowest Price - This product is ineligible for additional discounts or rebates.

Buy this product and your entire order ships for free.

Some orders are inelligible for delivery discounts. See offer details for disqualifying products and destinations.