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Thomson 31.8- mm 38.1 Bicycle Stems

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

Bar clamp diameter is the diamater of the handlebar.

S.H.I.S clamp diameter is the steerer tube diameter.

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Showing 36 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 )
Black31.8 mm130 mm28.690 degThreadless
In StoreIn StoreShips FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 724444
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
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 )
Black31.8 mm70 mm28.690 degThreadless
popularpopularShips FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 541817
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 )
Black31.8 mm100 mm28.6100 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 626800
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 )
Black31.8 mm90 mm28.690 degThreadless
Ships FreeShips Free

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 )
Black31.8 mm80 mm28.690 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 755644
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 )
Black31.8 mm70 mm28.6100 degThreadless
Ships FreeShips Free

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 )
Black31.8 mm90 mm28.6100 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 647634
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 )
Black31.8 mm40 mm28.690 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 751094
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 )
Silver31.8 mm40 mm28.690 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 332850
Thomson X4 Mountain 31.8 100mm 90 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 100mm 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 mm100 mm28.690 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 428098
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 )
Black31.8 mm110 mm28.6100 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 647349
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
Thomson X4 Mountain 31.8 100mm 100 Degrees Silver 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 100mm 100 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 mm100 mm28.6100 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 202837
Thomson 50mm x 7/8" Black BMX Stem
Thomson 50mm x 7/8" Black BMX StemThomson

Thomson BMX Stems are constructed of machined 7000-series extruded bar stock with heat-treated bolts. Item Specifications Color: Black Intended Use: … read more

Black22.2 mm50 mm28.690 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 368738
Thomson X4 Mountain 31.8 90mm 100 Degrees Silver 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 90mm 100 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 mm90 mm28.6100 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 925548
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 )
Black31.8 mm120 mm28.6100 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 178334
Thomson X4 Mountain 31.8 110mm 90 Degrees Black 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 110mm 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 mm110 mm28.690 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 822012
Thomson Elite X4 Mountain Stem - 40mm, 35mm, 0 Degree, Aluminum, Black
Thomson Elite X4 Mountain Stem - 40mm, 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

Black35.0 mm40 mm28.690 degThreadless
Ships FreeShips Free

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

BuyBuyPART NUM 551760
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 )
Black31.8 mm130 mm28.6100 degThreadless
Ships FreeShips Free

your price $114.95 + ships free

BuyBuyPART NUM 623442
Thomson

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

See all Thomson

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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