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

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Thomson 31.8 Seatpost Collar - Black
Thomson 31.8 Seatpost Collar - BlackThomson

The Thomson Seatpost Collar has several features that make it distinct. The collar utilizes the Thomson Seatpost bolt, washer and barrel nut combination … read more

StarStarStarStarStar 3.3 of 5 ( 3 ) 3.3 of 5 stars average ( 3 reviews )

25% offretail $39.95 your price $29.95

BuyBuyPART NUM 507460
Thomson Elite Seatpost Black 27.2 mm x 250 mm
Thomson Elite Seatpost Black 27.2 mm x 250 mmThomson

Over 40% stronger on ultimate strength test than the strongest production seatposts on the market. Over double the fatigue life of any other production … read more

StarStarStarStarStar 4.3 of 5 ( 3 ) 4.3 of 5 stars average ( 3 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 693352
Thomson Elite Set Back Seatposts - Black - 27.2 x 410 mm
Thomson Elite Set Back Seatposts - Black - 27.2 x 410 mmThomson

The Elite Set Back Thomson Seatpost has a post and cradle which are machined from one piece of 7000 aluminum. Post and cradle are machined from one … read more

your price $114.95 + ships free

BuyBuyPART NUM 404104
Thomson 29.8 Seatpost Collar - Black
Thomson 29.8 Seatpost Collar - BlackThomson

The Thomson Seatpost Collar has several features that make it distinct. The collar utilizes the Thomson Seatpost bolt, washer and barrel nut combination … read more

StarStarStarStarStar 3.3 of 5 ( 3 ) 3.3 of 5 stars average ( 3 reviews )

25% offretail $39.95 your price $29.95

BuyBuyPART NUM 603567
Thomson X4 Stem Mountain 31.8 60mm 90 Degrees Black 1-1/8" Threadless
Thomson X4 Stem Mountain 31.8 60mm 90 Degrees Black 1-1/8" ThreadlessThomson

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 )

$29 offretail $114.95 your price $84.98 + ships free

BuyBuyPART NUM 327291
Thomson MTB Aluminium Trail Handlebar 750mm 20mm Rise 31.8 
Thomson MTB Aluminium Trail Handlebar 750mm 20mm Rise 31.8 Thomson

Trail bar is 750mm wide with 12mm of rise, 6degrees of backsweep, and 4degrees of upsweep. The clamping area is 50mm, allowing a different bend profile … read more

your price $109.95 + ships free

BuyBuyPART NUM 717554
Thomson Elite Seatpost Black 30.9 mm x 367 mm
Thomson Elite Seatpost Black 30.9 mm x 367 mmThomson

Over 40% stronger on ultimate strength test than the strongest production seatposts on the market. Over double the fatigue life of any other production … read more

StarStarStarStarStar 4.5 of 5 ( 4 ) 4.5 of 5 stars average ( 4 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 503967
Thomson Masterpiece Seatposts Black
Thomson Masterpiece Seatposts BlackThomson

The Thomson Masterpiece Seatpost is not for everyone. We at Thomson wanted to create the best seatpost possible without regard to cost. The … read more

your price $159.95 + ships free

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Thomson 35.0 Seatpost Collar - Silver
Thomson 35.0 Seatpost Collar - SilverThomson

The Thomson Seatpost Collar has several features that make it distinct. The collar utilizes the Thomson Seatpost bolt, washer and barrel nut combination … read more

StarStarStarStarStar 3.3 of 5 ( 3 ) 3.3 of 5 stars average ( 3 reviews )

25% offretail $39.95 your price $29.95

BuyBuyPART NUM 749606
Thomson Road Alloy Handlebar 44cm 31.8 Black Aero Profile
Thomson Road Alloy Handlebar 44cm 31.8 Black Aero ProfileThomson

Our aluminum drop bars bring the performance, and dependability you have come to expect from Thomson. The lineup is available in 3 profiles, and varying … read more

your price $119.95 + ships free

BuyBuyPART NUM 834340
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
Thomson X4 Mountain 31.8 70mm 90 Degrees Silver 1-1/8" Threadless Stem
Thomson X4 Mountain 31.8 70mm 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 672763
Thomson Elite Stem Shim, 1-1/8" To 1" Steerer, 37mm, Black
Thomson Elite Stem Shim, 1-1/8" To 1" Steerer, 37mm, BlackThomson

Adapts Thomson 1-1/8" ahead steerer clamp to accept a 1" threadless steerer Choose from 40mm or 37mm heights. The 37mm height shims are specifically … read more

your price $11.95

BuyBuyPART NUM 821539
Thomson 35.0 Seatpost Collar - Black
Thomson 35.0 Seatpost Collar - BlackThomson

The Thomson Seatpost Collar has several features that make it distinct. The collar utilizes the Thomson Seatpost bolt, washer and barrel nut combination … read more

StarStarStarStarStar 3.3 of 5 ( 3 ) 3.3 of 5 stars average ( 3 reviews )

25% offretail $39.95 your price $29.95

BuyBuyPART NUM 862994
Thomson Aluminum Headset Spacer Pack, 1-1/8" Bag of 3, Black
Thomson Aluminum Headset Spacer Pack, 1-1/8" Bag of 3, BlackThomson

Machined aluminum spacers for tuning stem height and adding some Thomson flare Black or silver spacers with Thomson logo 1-1/8" kit … read more

your price $24.95

BuyBuyPART NUM 397915
Thomson Elite Seatpost Black 27.2 mm x 330 mm
Thomson Elite Seatpost Black 27.2 mm x 330 mmThomson

Over 40% stronger on ultimate strength test than the strongest production seatposts on the market. Over double the fatigue life of any other production … read more

StarStarStarStarStar 4.5 of 5 ( 4 ) 4.5 of 5 stars average ( 4 reviews )

your price $114.95 + ships free

BuyBuyPART NUM 633226
Thomson Covert Dropper Seatpost, 150mm, 31.6 x 450mm, Black
Thomson Covert Dropper Seatpost, 150mm, 31.6 x 450mm, BlackThomson

Applying four decades of expertise, Thomson has set the bar with the Covert dropper Custom made Norglide bearing bushings and Trelleborg … read more

your price $479.95 + ships free

BuyBuyPART NUM 646771
Thomson Seatpost Bolt/Nut/Washer
Thomson Seatpost Bolt/Nut/WasherThomson

Thomson Bolt/Nut/Washer Seatpost Parts … read more

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

your price $4.95

BuyBuyPART NUM 311729
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
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 )

your price $114.95 + ships free

BuyBuyPART NUM 541817
Thomson

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

See all Thomson

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.

This is the part number or identifier for this item from the manufacturer

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

Weight

The seatpost diameter must match to the seat tube diamater of your frame. If replacing a seatpost, you can usually find this measurement etched near the bottom of your current post.

Seatpost length is measured in millimeters. It is typically measured from the bottom of the post to the center of the rail mount.

Offset is often referred to as setback. This is the distance in mm that the clamp is offset from the center of the seatpost.

Seatpost Material

Rigid seatposts are the most common type of seatpost with no suspension or dropping capability.

Seatpost Clamp Style

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

Material

Handlebar Bar Clamp Diameter

Handlebar Width

Bar Rise

Thickness

On a dropper post, this is the distance that the post will drop.

Dropper posts have the ability to change heights. This has become a choice for mountain bike riders that prefer multiple riding positions.

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