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Calatech

Garmin Forerunner 255 Slate Grey

Garmin Forerunner 255 Slate Grey

100% Genuine Parts. Fully unlocked. 2-Year Warranty. Why buy new?

Why this matters
Regular price £164.99
Regular price £199.00 Sale price £164.99
Sale Sold out
Tax included.
Condition
👇 Not sure? Compare our grades

Out of Stock

Same-day collection available
Order within to collect today
★★★★★ 4.9/5 on Google 170+ 5-Star Reviews
Included FREE with every purchase
  • 2-Year Warranty — long-term protection included as standard
  • Battery Health Guarantee — strict standards, priority replacements if needed
  • Lifetime Local Support — call, email, or pop in anytime
  • Courtesy Loan Phones — stay connected during repairs
  • Repair Savings for Life — 20% off batteries & 10% off screens
  • Free Setup Help on £250+ — data transfer, iCloud & parental controls
  • Free Friday Phone Clean — ports, mesh, toggles + fresh protector
  • Same-Day Local Delivery — Haverhill & nearby areas
  • Customer Satisfaction Guarantee — return or swap if it’s not right
About This Device

Display: 1.3-inch sunlight-visible, transflective MIP display (260 × 260 resolution)
Case Size: 46mm (Forerunner 255) / 41mm (Forerunner 255S)
Weight: 49g (255) / 39g (255S)
Battery Life: Up to 14 days in smartwatch mode, up to 30 hours in GPS mode
Connectivity: GPS, GLONASS, GALILEO, Bluetooth, ANT+, Wi-Fi
Sensors: Wrist-based heart rate, Pulse Ox, barometric altimeter, compass, gyroscope, accelerometer, thermometer
Training Features: Daily suggested workouts, race predictor, VO2 max, recovery time, HRV status, Training Readiness
Smart Features: Notifications, Garmin Pay, music controls, safety and incident detection
Water Resistance: 5 ATM (up to 50 metres)
Compatibility: iOS and Android via Garmin Connect app
Year of Release: 2022

The Garmin Forerunner 255 is built for runners and athletes who want in-depth performance tracking without the bulk. With multi-band GPS for pinpoint accuracy and advanced metrics like Training Readiness and HRV status, it’s designed to help you train smarter and perform your best.

Lightweight, durable, and packed with smart features like notifications, Garmin Pay, and safety alerts, the Forerunner 255 delivers pro-level tools for fitness tracking, recovery insights, and race preparation — all from your wrist.

Click & Collect Info

Same-day collection available from our Haverhill store, Monday to Friday.

Order before 3pm and your device will be ready to collect the same-day.

We’ll email you as soon as it’s ready to collect. Please bring photo ID or your order confirmation.

Dispatch & Delivery

Orders placed before 3pm are dispatched the same working day.

Most deliveries arrive the next working day via tracked services.

Saturday delivery is available where applicable.

Warranty & Returns

Every device includes our 2-Year Warranty for complete peace of mind.

If you’re not happy, return it within 45 days with our Love-It Returns policy.

See our Warranty & Returns page for full details.

🔒 Secure checkout ⚡ Fast dispatch ✅ 2-Year Guarantee
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Pick your price tag.

We don't do "Used." We do "Smart." Select a condition to see exactly what you're paying for.

  • Brand New
  • Certified
  • Excellent
  • Good
For the Perfectionist
Brand New 💎
"Fresh from the factory. Mostly."

Factory Sealed

If you selected "Brand New":

The box is sealed. The plastic is on. It has never been touched by human hands. 100% Boxfresh.

Opened Box

If you selected "Opened Box":

The seal is broken, but the device has never been used. It is the exact same new phone, you just save money because a sticker was peeled. It's a smart loophole.

Included with Brand New:
  • Brand New! ✨

    This is a Brand New & Un-Used Item. The only difference? It's cheaper than RRP!

  • Included with Your Watch

    Watch Band + Charging Cable + Boxed.

  • 24-Month Warranty 🛡️

    Twice the standard coverage — every device is protected for a full 2 years, with priority repair or replacement.

  • Authenticity Guarantee 💕

    Every device we sell is thoroughly verified to ensure it is 100% genuine.

  • 85% to 100% Battery Health 🔋

    A (healthy!) 85-100% Battery Capacity. Original/Genuine Battery. Battery Re-Fresh Guarantee.

  • Expert Setup & Lifetime Support 💞

    From data transfer to parental controls, we’ve got you covered. And if you ever need help again - just reach out.

  • Help set-up your smartwatch

    First time smartwatch user? We’ve got you covered. We'll help you get set-up and connected to your phone, and teach you all the basics you need to navigate and utilise your watch!

  • Best Trade-In Prices 💷

    We pride ourselves on offering some of the highest trade-in values in the market. Our goal is to ensure you get the most value out of your old tech.

The Smart Choice
Calatech Certified ✨
"Looks new. Acts new. Costs way less."

Condition: Immaculate. Zero visible scratches.

Parts: 100% Genuine Parts Only.

Battery: 85% & Higher, Guaranteed.

In The Box:Fast Charging Cable + SIM Tool.

Included with Certified:
  • Included with Your Watch

    Watch Band + Charging Cable + Boxed.

  • 24-Month Warranty 🛡️

    Twice the standard coverage — every device is protected for a full 2 years, with priority repair or replacement.

  • As Good As New ✨

    A spotless device which looks AS good as new. You won't be disappointed.

  • 100% Original Device 📲

    NO Third Party Parts at all. Guaranteed Originality

  • 83% to 100% Battery Health 🔋

    A juicy battery with plenty of life. Battery Re-Fresh Guarantee.

  • Tested, Cleaned, Prepared 🧼

    Tested for top-level performance and functionality. In-Depth Exterior Clean.

  • Expert Setup & Lifetime Support 💞

    From data transfer to parental controls, we’ve got you covered. And if you ever need help again - just reach out.

  • Help set-up your smartwatch

    First time smartwatch user? We’ve got you covered. We'll help you get set-up and connected to your phone, and teach you all the basics you need to navigate and utilise your watch!

  • Best Trade-In Prices 💷

    We pride ourselves on offering some of the highest trade-in values in the market. Our goal is to ensure you get the most value out of your old tech.

  • 45-Day 'Love-It or Swap It' Guarantee ❤️

    If it’s not the one, just return or swap it — no questions asked. You’ve got 45 days to decide.

  • Device Viewing 📍

    Want to see a device before buying? No problem!

The Value King
Excellent Condition 👌
"90% perfect. Your friends won't know."

Condition: Micro-scratches possible (barely visible).

Screen: Excellent condition.

Battery: 84% & Higher, Guaranteed.

Savings: Significant price drop vs New.

In The Box:Fast Charging Cable + SIM Tool.

Included with Excellent:
  • Included with Your Watch

    Watch Band + Charging Cable + Boxed.

  • 15-Month Warranty 🛡️

    Any issues, we've got you covered. Always.

  • Original Quality ✨

    Guaranteed 100% original OR professionally refurbished in-house to the highest standards.

  • 83% to 100% Battery Health 🔋

    A juicy battery with plenty of life. Battery Re-Fresh Guarantee.

  • Tested, Cleaned, Prepared 🧼

    Tested for top-level performance and functionality. In-Depth Exterior Clean.

  • FREE Cleaning/Maintenance

    You'll also receive free watch and strap cleaning, to help keep it pretty.

  • Help set-up your smartwatch

    First time smartwatch user? We’ve got you covered. We'll help you get set-up and connected to your phone, and teach you all the basics you need to navigate and utilise your watch!

  • Expert Setup & Lifetime Support 💞

    From data transfer to parental controls, we’ve got you covered. And if you ever need help again - just reach out.

  • Best Trade-In Prices 💷

    We pride ourselves on offering some of the highest trade-in values in the market. Our goal is to ensure you get the most value out of your old tech.

  • 45-Day 'Love-It or Swap It' Guarantee ❤️

    If it’s not the one, just return or swap it — no questions asked. You’ve got 45 days to decide.

  • Device Viewing 📍

    Want to see a device before buying? No problem!

The Bargain
Good Condition 🛡️
"It's going in a case anyway, right?"

Condition: Visible scratches/scuffs on body or screen.

Function: 100% Perfect internally. Works like new.

Battery: 83% & Higher, Guaranteed.

Price: The absolute cheapest way to own this phone.

In The Box:Fast Charging Cable + SIM Tool.

Included with Good:
  • Included with Your Watch

    Watch Band + Charging Cable + Boxed.

  • 15-Month Warranty 🛡️

    Any issues, we've got you covered. Always.

  • Original Quality ✨

    Guaranteed 100% original OR professionally refurbished in-house to the highest standards.

  • 83% to 100% Battery Health 🔋

    A juicy battery with plenty of life. Battery Re-Fresh Guarantee.

  • Tested, Cleaned, Prepared 🧼

    Tested for top-level performance and functionality. In-Depth Exterior Clean.

  • FREE Cleaning/Maintenance

    You'll also receive free watch and strap cleaning, to help keep it pretty.

  • Help set-up your smartwatch

    First time smartwatch user? We’ve got you covered. We'll help you get set-up and connected to your phone, and teach you all the basics you need to navigate and utilise your watch!

  • Expert Setup & Lifetime Support 💞

    From data transfer to parental controls, we’ve got you covered. And if you ever need help again - just reach out.

  • Best Trade-In Prices 💷

    We pride ourselves on offering some of the highest trade-in values in the market. Our goal is to ensure you get the most value out of your old tech.

  • 45-Day 'Love-It or Swap It' Guarantee ❤️

    If it’s not the one, just return or swap it — no questions asked. You’ve got 45 days to decide.

  • Device Viewing 📍

    Want to see a device before buying? No problem!

Order Today, Get It Today!

Order by 4PM and collect the same-day.

We aim to get all orders to our Haverhill collection point within 30-minutes.

You will receive a confirmation email as soon as it's ready to go! If you haven't heard from us, just give us a call on 01440 840844.

Haverhill Delivery.

Place your order by 4PM and select Local Delivery—we’ll bring it to your door the same day with a convenient 1-hour time slot.

Orders placed after 4PM? No problem!

We’ll contact you the next day by lunchtime to arrange your 1-hour time slot.

(Coverage is Haverhill & Surrounding Villages).

Common concerns, and our solutions!

• A clear grading systems to help explain the differences - found here.

View devices in person by scheduling appointments at our office. Contact us here.

• To check you'll be happy with the item, we can send you a personalised video or photos of what you have purchased prior to dispatch. Just request this on our contact form here

30-Day Money-Back Guarantee + FREE and EASY returns if the device’s condition isn’t as expected.

• All batteries meet our minimum health standards (e.g., 83% / 85% or higher) and have been drain tested to ensure they discharge at the correct rate. (For Clearance listings, battery health may vary).

• We offer a free battery replacement within a 30-Day period if you're not satisfied with the battery life, and it falls below our standards upon a re-test.

• The option to fit a new battery to a phone prior to purchase is available. If you would prefer a new one for peace of mind, just get in touch with the team and we'll work it out with you!

Battery Re-Fresh Guarantee, and how we test phone batteries! Read about it here. /

Not at all! Our refurbished devices are thoroughly tested and perform just as well as new ones. If there’s ever an issue, we'll repair or replace under warranty or fix it remotely with our lifetime support!

We’ve got you covered! If your device develops a fault (not caused by accidental damage), we’ll repair or replace it for free. It’s our way of giving you peace of mind.

We get it—sometimes things just don’t feel right. That’s why we offer a 30-day return policy. Let us know, send it back in its original condition, and we’ll sort a refund or exchange for you, no hassle.

Our Certified range is all about keeping things 100% original. For our other ranges and conditions, we sometimes use premium (only the best available on the market!) aftermarket parts if genuine ones aren’t available.

Of course! If something’s not quite right, or if you just need help with getting set up, just reach out to us. We’re here to help and will do everything we can to get you up and running.