Branta GT8 Carbon Gravel Handlebar — 31.8 mm

The Branta GT8 carbon gravel handlebar pairs a 31.8 mm stem clamp with drops that are wider than the tops. It is the handlebar listed for the X-LAB GT8, offered in three sizes so you can choose the width that suits your riding position.

Think of the two widths as two different hand positions: the narrower tops keep your upper grip position compact, while the wider drops give you a broader stance when riding in the drops. The bar and stem are separate components, so this listing is for the handlebar.

Fit and compatibility

Listed for the X-LAB GT8. The stem must accept a 31.8 mm handlebar clamp. That measurement confirms the center clamp size only: control fit, cable or hose routing and clearance must also be checked before fitting it to another bicycle.

Choosing your size

Each option gives top width / drop width in millimeters. For example, 390 mm tops / 450 mm drops is one handlebar with two different widths, not two selectable bars. All three sizes use a 31.8 mm clamp.

Common questions

Does this include a stem?

This is a separate handlebar, not an integrated bar-and-stem cockpit. A compatible stem is required.

What should I check before installation?

Confirm the exact part and size, control compatibility and routing with your mechanic. Follow the bicycle and component manufacturer's installation instructions and torque limits. Contact Go Grava if you need to confirm any required spacers, fittings or hardware before ordering.