0
Your Profile
Your Basket 0
Your Offers 0
Continue Shopping
Checkout

Click & Collect is FREE

Buy online, collect in store

Free shipping over £40*

Terms and conditions apply

No Hassle Returns

Shop with confidence
 £

Finance available in store & online

Flexible finance options
To improve your shopping experience today and in the future, this site uses cookies.
Read our full Privacy Policy & Cookie information here
I Accept Cookies
Introducing the OnGuard RockSolid Bicycle Lock, the pinnacle of bike lock innovation.
Introducing the OnGuard RockSolid Bicycle Lock, the pinnacle of bike lock innovation.
Onguard

OnGuard RockSolid D-Lock Bicycle Lock - Black/Yellow

£149.99 £199.99 25% off
Size Guide
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined

No Hassle Returns

Returns

Shop with confidence. If you've ordered the wrong size or you're not happy with a purchase it's not a problem. We want to help you find the right products to get the most out of your cycling. Simply return the item to us within 30 days in unused condition with all the packaging and we'll replace it or refund you. Kindly note that refunds can take up to 14 working days to process. *InvisiFrame kits are non-returnable/non-refundable.

We do not offer free returns because we aim to keep the cost of the product as low as possible. However, if the goods are found to be faulty, damaged or not as described, please contact us to discuss the returns process.

Call us if it's a bike as we can help arrange collection. Tel 01752 849315 or info@certini.co.uk

There is a downloadable returns form to complete and return with your goods.

Returns Address:

Certini Bicycle Company
10 Kingsmill Road
Tamar View Industrial Estate
Saltash
PL12 6LD

Under the Consumer Rights Act you have a legal right to reject goods that are of unsatisfactory quality, unfit for purpose or not as described, and get a full refund - as long as you do this quickly. This right is limited to 30 days from the date you buy your product.

CHRISTMAS RETURNS

We want to take the hassle out ofChristmasfor you so we have extended ourReturnsperiod during this time. Any products purchased between 1st December 2025 and 24th December 2025 can be returned until 18th January 2026. Please refer to ourreturnspolicy before returning your items.

OnGuard RockSolid D-Lock Bicycle Lock - Black/Yellow

Brand:Onguard

Code:ON-28590-9

Introducing the OnGuard RockSolid, the pinnacle of bike lock innovation. Designed with cutting-edge materials and advanced engineering, this revolutionary lock stands as an impenetrable fortress against even the most determined thieves armed with angle grinders. Crafted from a proprietary blend of ultra high-strength materials and reinforced with a multi-layered defence system, the OnGuard RockSolid is virtually impervious to the cutting force of angle grinders. Its intricate structure is engineered to resist cutting, rendering any attempts to breach its fortified exterior futile. With each component meticulously designed and rigorously tested, the OnGuard RockSolid boasts an unrivalled resistance to brute force attacks. Its hardened, shrouded shackle is impervious to an angle grinder, defying even the most aggressive cutting attempts. The OnGuard RockSolid not only provides unbeatable security but also offers a seamless user experience. Its ergonomic design ensures easy handling, making it the lightest angle grinder resistant lock in the market.

Experience peace of mind like never before with the OnGuard RockSolid. Defy the odds, protect what matters most, and leave would-be thieves in awe of this unyielding fortress of two-wheel security.

  • Dimensions: 90x175x14mm (WxHxD)
  • Keys: 5 keys included"
Sizing Information
Professional Opinion
Home Accessories Onguard Locks