Handlebars

Platt racestuur 25,4/31,8 mm aluminium

This PLATT drop bar comes in two clamp diameters, 25.4 and 31.8 mm, and is made of curved aluminium. The version in the title is 25.4 mm with a 400 mm width.

What you get

Curved aluminium drop bar
25.4 mm or 31.8 mm clamp
25.4 mm version, 400 mm wide

Why the right handlebar?

A handlebar that does not suit you shows up in your shoulders, neck and wrists. The width should roughly match your shoulder width. On a road bar that is usually 38 to 44 cm (measured centre to centre). A bar that is too narrow makes breathing and steering harder, one that is too wide costs aerodynamics and makes the bike heavier to steer.

With a drop bar you look at two measures: reach and drop. Reach is how far the bar projects forward, usually 70 to 100 mm. Drop is how deep the drops sit, about 100 to 140 mm. A short reach and drop make the position easier, larger values give a sportier posture. A gravel bar often has flare: the drops angle outward, giving more control and a wide grip low down.

MTB bars are wide, usually 720 to 800 mm, with a little rise and a backsweep. A wider bar gives more control downhill, but can be awkward in the woods. You can cut it down yourself.

The clamp has to match your stem. The standard is 31.8 mm, with 35 mm on some bikes or an integrated cockpit. Aluminium is strong and easy to handle, carbon is lighter and damps vibration better, but is sensitive to overtightening and to crash damage.

How the types compare

The bar shape decides your position and how much control you have.

Type	Width	Reach and drop	Suits
Road drop bar	38 to 44 cm	Reach 80 to 100 mm, drop 125 to 140 mm	Sporty, fast riding
Compact or shallow bar	38 to 42 cm	Reach 70 to 80 mm, drop 100 to 125 mm	Comfort and smaller hands
Flared gravel bar	40 to 50 cm at the drops	Flare 12 to 30 degrees	Gravel and unpaved roads
MTB riser bar	720 to 800 mm	Rise 0 to 40 mm	Climbing, descending and technical

Values are guidelines and vary by model. Check the dimensions of the bar you are considering.

Choose it if

You want a 400 mm bar for average shoulder width
You can pick one of two clamp sizes to suit your stem
You have shoulder, neck or wrist pain and want to fine-tune your position.
You want more control on gravel or downhill, with a wider or flared shape.

Choose something else if

You are looking for a carbon bar
Your stem has a different clamp diameter (31.8 or 35 mm). The bar will not fit without a new stem.
Your bike has an integrated bar and stem in one piece. You would have to replace the whole unit.

How to fit a handlebar

Check the clamp diameter
Check that the bar clamp area and stem match, usually 31.8 mm. Measure with calipers if in doubt.
Remove the old bar
Remove the tape, levers and any brake and gear cables. Undo the faceplate bolts and take the bar off.
Position the new bar
Seat the bar in the stem and snug up the faceplate bolts gently. Set the bar to the angle you want. On carbon, use assembly paste.
Tighten in a cross pattern
Tighten the bolts in a cross pattern, a little at a time, to the stated torque (usually 5 to 6 Nm). Keep the gap even top and bottom.
Fit levers and tape
Put the levers back at the right height, route the cables and wrap fresh tape. Test brakes and shifting before you set off.

Good to know

Choose the right clamp diameter when you order
Check that the title names the size you want
Never overtighten the bolts on a carbon bar and use a torque wrench. Replace a scratched or damaged carbon bar.
After a crash a bar can have invisible cracks. Replace it if in doubt, as it is a safety part.
A wider bar means adjusting levers and cable lengths. Check after fitting that everything works.
Check the bolts regularly. A loose bar is dangerous.

What you get

Why the right handlebar?

How the types compare

Choose it if

Choose something else if

How to fit a handlebar

Check the clamp diameter

Remove the old bar

Position the new bar

Tighten in a cross pattern

Fit levers and tape

Good to know

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