Radley smartwatch straps: replacement, sizing and adjustment

One of the quietly good things about Radley smartwatches is that most of them use standard quick-release straps, the same spring-bar system used across the watch industry. That means a worn silicone strap or a fancied leather upgrade doesn't require a jeweller, special tools, or even official Radley parts. This guide covers how the quick-release system works, how to find your strap width, what to look for in third-party straps, and how to adjust the metal bracelet versions.

How quick-release straps work

Flip your watch over and look at where the strap meets the case. On a quick-release strap you'll see a small sliding pin or lever on the underside of the strap, sitting flush against the spring bar. To remove the strap:

1. 1
   Slide the pin toward the centre of the strap and hold it. This retracts one end of the spring bar.
2. 2
   With the pin held, tilt that side of the strap away from the case and lift it free.
3. 3
   Repeat for the other side.

Fitting the new strap is the reverse: seat one end of the spring bar in its hole in the lug, slide the pin to retract the other end, position it against the second hole, and release. You should hear or feel a small click. Always tug the strap firmly after fitting. A spring bar that isn't fully seated is how watches end up on pavements.

Finding your strap width

Strap width is measured in millimetres across the gap between the lugs where the strap attaches, not the strap's widest point. If you don't have callipers, a ruler across the gap is accurate enough, since straps come in even sizes (16, 18, 20, 22mm).

A reliable shortcut is your model code, printed on the caseback and on the box (formats like RYS08-…, RYS20-…, RYS33-…). The RYS prefix identifies the Series; search that full code and "strap" to confirm the width for your exact variant. Because Radley has varied widths between colourways and generations, measure or check your code rather than assuming. A strap 1mm too wide simply won't seat.

Treat these widths as a starting point, not a guarantee. Always measure the gap between your lugs or check your model code before ordering.

One structural note: the slim Series 21 and some tracker-style models use straps shaped to the case rather than a straight standard strap. For those, you're best sticking to straps sold specifically for that model.

Official vs third-party straps

Official Radley replacement straps exist for common models, in the brand's signature leathers and colours, and are the safe choice for a like-for-like swap. Availability comes and goes with the seasons, and discontinued colourways can be hard to find.

Third-party straps open the field enormously. Any quick-release strap in your width will physically fit the standard-lug models. Things worth knowing before you order:

• Buy quick-release specifically. A standard strap in the right width fits too, but you'd need a spring-bar tool to fit it; quick-release costs pennies more and keeps future swaps toolless.
• Match the width exactly. 20mm means 20mm. Too narrow looks fine at a glance but slides side to side and wears the lugs.
• Silicone for sport, leather for wear, milanese mesh for dress is the usual playbook. Cheap leather straps (under ~£8) tend to crack within months; mid-priced (£10–20) third-party leather generally outlasts the watch.
• Colour-matching the case: most Radley cases are rose-gold or gold toned; straps with silver-toned buckles will clash. Look for straps with rose-gold hardware.

There's no electronic connection through Radley straps. Unlike some big-brand watches, nothing stops third-party straps working. It's purely mechanical.

Adjusting a bracelet (metal link) strap

The bracelet versions, like the Series 33 with the rose-gold-tone bracelet, are sized by removing links or, on some designs, sliding an adjustable clasp. Each bracelet watch ships with a printed adjustment guide; Radley also provides the bracelet adjustment instructions as a download on their support pages if yours has gone missing.

The general link-removal process, if yours uses pin-and-link construction:

1. 1
   Put the watch on and count how many links too loose it is. You'll usually remove links in pairs, one from each side of the clasp, to keep the clasp centred.
2. 2
   Look for the arrows stamped inside certain links: those are the removable ones, and the arrow shows the direction to push the pin out.
3. 3
   Use a link-removal tool (a few pounds online) or a pushpin and patience: press the pin out in the arrow direction, separate the links, remove the spares, and press the pin back in against the arrow.
4. 4
   Keep the spare links. You'll want them if the watch changes wrists as a gift or your sizing changes.

Cleaning and caring for straps

Silicone: warm water, a drop of washing-up liquid, soft cloth; dry before wearing (trapped moisture is the main cause of wrist irritation with any silicone strap). Leather: keep it out of the shower and the gym. Sweat and soaking are what kill leather straps; wipe with a barely damp cloth and let it dry naturally. Mesh/bracelet: soft brush around the links, and dry thoroughly.

If you wear the watch for workouts daily, the honest answer is to run two straps: silicone for exercise, leather or mesh for the rest of the day. With quick-release, the swap takes fifteen seconds.

When the strap breaks at the spring bar

Related: choosing between models, including which come as interchangeable strap sets, is covered in our model guide. Watch playing up? See setup & troubleshooting.