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Updated: 06 Apr 2026

10 Best Bike Headset Spacers Carbon-fiber

#1 Best Pick
PLATT 10 Pieces Bike Headset Spacer Full Carbon Fiber Bicycle Stem Headset Spacer Fit 1 1/8-Inch Compatible with MTB Bike Road Bikes

PLATT 10 Pieces Bike Headset Spacer Full Carbon Fiber Bicycle Stem Headset Spacer Fit 1 1/8-Inch Compatible with MTB Bike Road Bikes

Brand: PLATT
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  • Material: 100% Carbon Fiber,Super Lightweight,Good Strength,Resistant to Corrosion, never rusts,A good replacement for your Aluminum alloy bike headset spacers.
  • Package included:2mm*2,3mm*2,5mm*2,10mm*2,15mm,20mm (10 Pcs).
  • Multi-size for you to adjust the appropriate height,Small size of spacer headset let you have a more precise height adjustment.
  • Ultra Precision Diamond Blade Machine Cut, Fit All Road /Mountain Bikes.
  • Use for 1-1/8" (28.6mm) front stem fork.
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#2 Best Value
ECSiNG Set of 10PCS Ahead Stem Spacer Disc Set Headset Spacers 3mm, 5mm, 10mm, 15mm, 20mm Carbon Glossy Fit 1 1/8-Inch Compatible with MTB Bike Road Bikes

ECSiNG Set of 10PCS Ahead Stem Spacer Disc Set Headset Spacers 3mm, 5mm, 10mm, 15mm, 20mm Carbon Glossy Fit 1 1/8-Inch Compatible with MTB Bike Road Bikes

Brand: ECSiNG
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  • 10Pieces of 5 Height Size.This headset spacer kit contains 5 different height sizes: 3 mm,5 mm,10 mm,15 mm,20 mm.
  • Smooth incision edge offers high tightness.Small size spacer let you have a more precise height adjustment.You can combine them freely to meet your different needs.
  • Made of woven carbon fiber,nice appearance,lightweight and well temperature resistance.
  • Compared with aluminum alloy bike stem spacers,its more hard,better strength,more friction resistance and high corrosion resistance.
  • This headset spacer set fits for 1-1/8" bike headset stem.Universal for most bicycle,like mountain bike,road bike,MTB bike,Compatible with BMX and etc.
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#3 Budget Pick
NEPIDOVS 16PCS Bicycle Headset Spacer Bike Handlebar Stem Spacers Threadless Aluminum Alloy Headset Stem Spacer Set Fit 1 1/8-Inch Stem for MTB BMX Mountain Road Bikes Cycling 2MM 5MM 10MM (Colorful)

NEPIDOVS 16PCS Bicycle Headset Spacer Bike Handlebar Stem Spacers Threadless Aluminum Alloy Headset Stem Spacer Set Fit 1 1/8-Inch Stem for MTB BMX Mountain Road Bikes Cycling 2MM 5MM 10MM (Colorful)

Brand: NEPIVDOS
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  • Package Contain:16Pcs Bicycle Headset Spacer in Total.Blue:10mm(4pcs)+5mm(2pcs),Red:10mm(4pcs)+5mm(1pcs),Gold:10mm(4pcs)+5mm(1pcs).Provide various combination to adjust height of handlebars to fit your riding style.
  • Material: Bicycle headset spacers threadless are made of black anodized aluminum alloy material with smooth surface and exquisite workmanship
  • Stem spacers road bike inner diameter is 28.6mm,1-1/8" headset spacer set, compatible with 28.6mm front stem fork of MTB, BMX, mountain bike, road bike etc
  • Aluminum headset spacer is lightweight and easy to install, resistant to corrosion, more sturdy and durable than carbon fiber headset spacers, fit most of the bicycles
  • Good quality, light weight, good strength and well temperature resistance, good impact resistance
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#4 Top Choice
BEANPRECOY 8PCS Bicycle Headset Spacer Bike Front Stem Fork Washer Aluminum Alloy Bicycle Handlebar Spacers Front Stem Fork Washer 5mm/10mm/15mm/20mm for MTB BMX Road Bike

BEANPRECOY 8PCS Bicycle Headset Spacer Bike Front Stem Fork Washer Aluminum Alloy Bicycle Handlebar Spacers Front Stem Fork Washer 5mm/10mm/15mm/20mm for MTB BMX Road Bike

Brand: BEANPRECOY
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  • 【High Quality Materials】: The bicycle headset spacer is made from aluminium alloy material, lightweight and durable, strong hardness and not easy to get deformed.
  • 【Package Included】: The Headset Spacer has 4 different size(5mm/10mm/15mm/20mm), each size 2 pcs, into on pack, they could fit for your demand and meet different needs.
  • 【Very Practical】: These headset spacers are very lightweight, and it won't add any burden to your bike, you will feel comfortable when riding. Can extend the practical life of the bicycle.
  • 【Easy to Install】: The Headset Spacer is lightweight and easy to install, having advantages of smooth surface and exquisite workmanship, Such a practical tool you will need it.
  • 【Applicable Occasions】: The Headset Spacer is perfectly suitable for 28.6mm front stem fork of MTB mountain bike, road bike etc.Conform to strict quality control standards, dependable to use.
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#5 Popular Choice
Glarks 15Pcs Bike Fork Star Nut Headset Spacer Installation Tool Kit, Bike Fork Installer Setting Tool and Rubber Hammers with Star Nuts and 3/5/10/15/20mm Bicycle Carbon Fiber Headset Spacer Kit

Glarks 15Pcs Bike Fork Star Nut Headset Spacer Installation Tool Kit, Bike Fork Installer Setting Tool and Rubber Hammers with Star Nuts and 3/5/10/15/20mm Bicycle Carbon Fiber Headset Spacer Kit

Brand: Glarks
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  • ♛【What You Get】:Glarks 15pcs bicycle repair tool kit includes 1pc rubber hammer with 2pcs hammer heads, a set of star nut drive tool including 1pc blue auxiliary sleeve, 1pc percussion rod, 2pcs positioning screw and 3pcs bicycle star nuts, and it contains 5pcs bicycle headset spacer in 5 different sizes: 3mm, 5mm, 10mm, 15mm, 20mm. The most common used tools can meet your bicycle repair and maintenance needs.
  • ♛【High Quality Material】: These bicycle repair tools are made of high quality steel, featured with high strength, sturdy and durable, have well performance of rust resistance and corrosion resistance, ensuring long service life.
  • ♛【Extremely Easy to Use】: Follow the instruction picture and you can complete your work easily and quickly, just need three steps. First, screwing on the headset star nuts. Second, inserting into the tube. Last, using the hammer to strike the percussion rod of blue star nut drive tool. Don’t forget that the star nut need to be tapped into the fork steerer at the right position with a hammer.
  • ♛【Double Head Hammer】: Come with a double-headed hammer with 2 replacement head. The hammer is 240mm/9.44in in length, the diameter and the height of the hammer heads is 25mm/0.98in and 24mm/0.96in. Adopts embedded design and ergonomic hand design, the head is not easy to fall and the hammer has a comfortable grip, suitable for installing bicycle fork star nut quickly and effortless.
  • ♛【Wide Application】: It's easy to carry and handle,the lightweight design allow you can use it anywhere and anytime. It can be applied to tighten the cassette flywheel or rotating flywheel. Suitable for any brand 12-tooth spline flywheel box lock ring.
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#6 Top Pick
Sumind 11 Pieces Bike Carbon Fiber Headset Spacer Bicycle 1-1/8 Inch 20 15 10 5 3 2 1 mm, 7 Size

Sumind 11 Pieces Bike Carbon Fiber Headset Spacer Bicycle 1-1/8 Inch 20 15 10 5 3 2 1 mm, 7 Size

Brand: Sumind
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  • Multi-size package: this package contains 7 different sizes, 1 mm, 2 mm, 3 mm, 5 mm, 10 mm, 15 mm, 20 mm, small size of spacer headset let you have a more precise height adjustment
  • Appearance and performance: automatic cutting, smooth edge, fit most of the road bicycles, delicate texture and durable to use
  • Material of bike handlebar spacer: woven carbon, nice look and good quality, light weight, good strength and well temperature resistance, good impact resistance
  • Feature of carbon fiber bicycle headset spacer: more resistant to corrosion, harder than aluminum alloy headset spacer, and lighter than aluminum alloy made one
  • Size detail: inner diameter is approx. 28.6 mm while the external is 34.9 mm, total weight is about 45 g
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#7 Top Pick
Unikstone 12 Pieces Bike Headset Spacer Carbon Fiber Bicycle Front Fork Stem Spacers Fit 1 1/8-Inch Stem, 1 2 3 5 10 15 mm

Unikstone 12 Pieces Bike Headset Spacer Carbon Fiber Bicycle Front Fork Stem Spacers Fit 1 1/8-Inch Stem, 1 2 3 5 10 15 mm

Brand: Unikstone
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  • Package includes 6 sizes of spacers, they are 1 mm, 2 mm, 3 mm, 5 mm, 10 mm, 15 mm, 2 pieces of each size. You can match them to any height you want.
  • The Spacers are made of carbon fiber, lighter weight, more resistant to high temperature, corrosion and friction.
  • This carbon fiber spacer has an excellent quality, attractive and durable, and convenient to carry and use.
  • The inner diameter of the spacer is 28.6 mm and the outer diameter is 34.9 mm, suitable for most bicycles.
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#8 Top Pick
Unron Bike Headset Spacer, MTB, Road Bike and BMX Headset, Carbon Fibre, 9 Sizes 1/2/3/5/8/10/15/20/30 mm, Compatible with 28.6 mm Stems, Universal Fit, Unron.

Unron Bike Headset Spacer, MTB, Road Bike and BMX Headset, Carbon Fibre, 9 Sizes 1/2/3/5/8/10/15/20/30 mm, Compatible with 28.6 mm Stems, Universal Fit, Unron.

Brand: Unron
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  • Size Range: 9-size bike headset spacer kit—1/2/3/5/8/10/15/20/30 mm—for accurate stack tuning. Compatible with 1-1/8" (28.6 mm) stems; ideal for mtb headset and road cockpit setups.
  • Height Tuning: Precise adjustments help dial cockpit position for comfort and control; small increments simplify setup on trails or tarmac, perfect for bike headset spacer installs.
  • Material: Woven carbon fibre construction is lightweight and temperature-resistant, delivering a clean cockpit look and consistent performance for road bike headset builds.
  • Performance vs Alloy: Compared with aluminium alloy spacers, carbon offers higher hardness and strength with greater friction and corrosion resistance—suitable across BMX headset builds.
  • Compatibility: Fits 1-1/8" (28.6 mm) stems; ID ≈ 28.6 mm, OD 34.9 mm. Universal for most bikes, including MTB, road and BMX configurations; easy to mix heights to meet setup needs.
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#9 Top Pick
ONGHSD 9 Pieces/Set Carbon Fiber Bike Headset Spacer Kit 1/2/3/5/8/10/15/20/30mm MTB Bike Headset Rings Bicycle Headset Spacer Kit Fits for 1 1/8 Inch Road Mountain Bike Stem Spacers

ONGHSD 9 Pieces/Set Carbon Fiber Bike Headset Spacer Kit 1/2/3/5/8/10/15/20/30mm MTB Bike Headset Rings Bicycle Headset Spacer Kit Fits for 1 1/8 Inch Road Mountain Bike Stem Spacers

Brand: ONGHSD
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  • 9 Pieces of 9 Height Size.This headset spacer kit contains 9 different height sizes: 1 mm,2 mm,3 mm,5 mm,8 mm,10 mm,15 mm,20 mm,30 mm.
  • Smooth incision edge offers high tightness.Small size spacer let you have a more precise height adjustment.You can combine them freely to meet your different needs.
  • Made of woven carbon fiber,nice appearance,lightweight and well temperature resistance.
  • Compared with aluminum alloy bike stem spacers,it’s more hard,better strength,more friction resistance and high corrosion resistance.
  • Inner diameter is approx. 28.6mm,external is 34.9mm.This headset spacer set fits for 1-1/8" bike headset stem.Universal for most bicycle,like mountain bike,road bike,MTB bike,BMX and etc.
Check latest price on Amazon
#10 Top Pick
PLATT 10 Pieces Bike Headset Spacer Full Carbon Fiber Bicycle Stem Headset Spacer Fit 1 1/8-Inch Compatible with MTB Bike Road Bikes

PLATT 10 Pieces Bike Headset Spacer Full Carbon Fiber Bicycle Stem Headset Spacer Fit 1 1/8-Inch Compatible with MTB Bike Road Bikes

Brand: PLATT
Read more
  • Material: 100% Carbon Fiber,Super Lightweight,Good Strength,Resistant to Corrosion, never rusts,A good replacement for your Aluminum alloy bike headset spacers.
  • Package included:2mm*2,3mm*2,5mm*2,10mm*2,15mm,20mm (10 Pcs).
  • Multi-size for you to adjust the appropriate height,Small size of spacer headset let you have a more precise height adjustment.
  • Ultra Precision Diamond Blade Machine Cut, Fit All Road /Mountain Bikes.
  • Use for 1-1/8" (28.6mm) front stem fork.
Check latest price on Amazon

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