Handlebar racing 410-25.2 mm vintage bike Eroica R309

The two numbers that matter on a road bar are width and clamp diameter. This used racing handlebar measures 410 mm across the drops and 25.2 mm at the stem clamping area, placing it firmly within classic French-era cockpit sizing.

Why this bar suits a period restoration

A 410 mm width keeps the rider’s position compact without pinching the chest, while the 25.2 mm clamp matches many older quill stems. If you’re piecing together an Eroica-eligible build or refreshing a tired cockpit, this profile gets the geometry right without guesswork.

The photos are an integral part of the listing: examine the bends, the engravings, and the overall surface before deciding. Typical minor signs of use or storage such as light scuffs may be present; any deeper rust, cracks, or distortion would be called out explicitly.

Because the stock is organized by physical location codes, each bar is individually labeled and stored. That means what you see listed corresponds to a real, inspected unit — not a shuffled stock image.

What to pair it with

For a coherent front end, this bar works well with period-correct drivetrain and cockpit components. If your stems or shifters need a refresh too, a matching quill stem or a period front derailleur from the same shelf can complete the setup. A similar-width alternative like the 400-25.2 mm racing handlebar shows how close sizing varied between brands.

And if you’re unsure about the exact clamp standard, compare against the AVA 400-25 mm version — the one-millimeter difference is exactly the kind of detail that catches restorers out.