How to Choose Drawer Runners: Mounting, Length and Extension

A drawer that sticks or no longer opens neatly can make an otherwise useful cabinet frustrating to use. Before buying replacement drawer runners, take a few measurements and identify the system already fitted. A longer runner, a higher load rating or a different closing mechanism will not help if it does not fit the drawer.

This guide explains what to check when replacing a pair or choosing runners for a new drawer. Start with compatibility, then compare access and closing action.

1. Identify the mounting style first

Remove the drawer using its existing release method and photograph both the drawer and cabinet fixings. Look for a product code on the old runner. These details are more useful than choosing a replacement by appearance alone.

• Bottom-fix roller runners: check the rails fitted along the lower edges of the drawer. Our white roller drawer runners are supplied as a left and right pair and have selectable runner lengths.
• Grooved-side runners: inspect the recess in the drawer side. Our 17mm ball bearing runners are designed for grooved drawer sides and use partial extension. Check the groove and fixing arrangement rather than assuming any slim runner will fit.
• Concealed undermount systems: check the underside of the drawer and any clips or locking devices. Use the specific system’s fitting instructions; do not assume a concealed runner can replace a side-mounted rail without alterations.

For a straightforward repair, compare the replacement with the original mounting style, dimensions and fixing pattern. For a new build, choose the runner before finalising the drawer box dimensions.

2. Measure the runner and the available space

Write down the closed length of the existing runner, the drawer box depth and the usable cabinet depth. Measure inside the cabinet, allowing for anything that obstructs the runner, such as a back panel or a front fixing. An overall cabinet measurement does not show how much clear space is available inside.

Also check runner height and the space between the drawer sides and cabinet. Follow the drawing for the exact model for side clearance, front setback and fixing positions. There is no single clearance measurement that suits every runner system.

Keep length and extension separate. A nominal runner length describes its size; it does not automatically tell you how far the drawer travels. When a product offers several sizes, select the required option and check that option’s availability before ordering.

3. Decide how much access you need

Partial extension leaves part of the drawer within the cabinet when open. Full extension is intended to give greater access towards the back. Think about the contents: shallow everyday items may be easy to reach, while a deep drawer holding larger objects may benefit from more access.

Our H45 self-closing ball bearing runners are listed as full extension and supplied as a pair. Check the exact length and technical drawing rather than choosing solely from the phrase “full extension”.

4. Separate closing action from load capacity

Check whether the selected model is standard closing, self-closing, soft-close or push-to-open. These labels describe different features. Do not assume a self-closing product includes the same damped closing action as a product specifically sold as soft-close, or that soft-close also means push-to-open.

For load capacity, consider the drawer and what it will hold. Check how the manufacturer defines the rating and follow its installation requirements. Avoid choosing a runner at the limit of your estimated load.

Some models also restrict drawer proportions. For the GTV H45 PRESTIGE self-closing range, GTV’s product information states that drawer width must not exceed nominal slide length. This is a model-specific requirement, not a rule to apply automatically to every runner.

5. Check what one pack actually contains

A pair normally means one left and one right runner for a single drawer. Compare that with multipack listings before calculating how many to buy. Two runners are not the same as two pairs.

Check whether screws, clips or other fittings are included. The H45 pair linked above lists screws as not included. Choose fixings suitable for the runner instructions and your furniture; an unsuitable screw length can damage a panel or interfere with movement.

Your checklist before ordering

• Matching mounting style and any required groove or locking fittings.
• Correct closed length, runner height and cabinet clearance.
• Suitable extension and closing action for the drawer.
• Appropriate load rating and drawer proportions.
• Enough pairs and any separately required fixings.

Browse our drawer runners category to compare the available systems. Keep your measurements and the existing model code beside you while checking each listing. For more buying guides, return to Guides & Advice.