Kryptonite Stronghold Ground Anchor, Sold Secure Diamond
✅ Sold Secure Diamond, the highest rating
✅ Bolts into solid concrete floors or walls
✅ Fixings sealed with hardened ball bearings
Regular price
£89.99
inc. VAT
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If you need assistance, before you buy
Feel free to message or call our head of sales, Mathew, who will be happy to help in any way he can.
The E-Bike Centre Commitment
- Free UK Delivery — free standard delivery to most mainland UK addresses.
- Buy Now, Pay Later — flexible Klarna options shown at checkout for eligible orders.
- 100% Customer Satisfaction — UK-based human customer care before and after your purchase.
A lock is only as strong as what you attach it to. The Kryptonite Stronghold bolts straight into a concrete floor or wall, giving you a fixed, hardened anchor point for your e-bike at home: in the garage, shed, storage cage or parking bay. It is rated Sold Secure Diamond, the highest rating Sold Secure award.
A hardened steel shackle sits on a heavy cast baseplate. Once it is bolted down, three hardened ball bearings are hammered over the bolt heads and capped, so the baseplate cannot simply be unbolted, and a shell cover hides the fixings. Many UK home and cycle insurance policies ask for a minimum Sold Secure rating, and some require locking to an immovable object, so check your policy wording.
- Hardened steel shackle on a heavy cast baseplate
- Three hardened security ball bearings seal the bolt heads, with cover disks
- Shell cover conceals the fixings entirely
- Everything needed to fit it is in the box, except the drill
- Maker: Kryptonite
- Model: Stronghold ground anchor
- Security rating: Sold Secure Diamond
- In the box: Shell cover and baseplate; 3 hex head bolts with expanding shield nuts; 3 hex head bolts for the cover; 3 hardened security ball bearings and cover disks; masonry drill bits, 5/8" and 5/16"; 4 mm and 6 mm hex wrenches
- Fitting: Solid concrete only, with a hammer drill or heavy-duty drill; fixing holes 58.8 mm (2.31") deep. Kryptonite warn against hollow, soft or porous block or house brick
- Pairs with: A Sold Secure rated U-lock or chain
Match the frame size to your height using the chart below, then set your saddle height so your leg is almost straight at the bottom of the pedal stroke. If you are between sizes or have any mobility concerns, size down or choose a step-through frame.
- 4'10" – 5'2" — 13" – 14" (XS)
- 5'2" – 5'6" — 15" – 16" (S)
- 5'6" – 5'10" — 17" – 18" (M)
- 5'10" – 6'1" — 19" – 20" (L)
- 6'1" – 6'4" — 21" – 22" (XL)
Some models, such as UTO's folding e-bikes, come in one frame size; that model's Specifications list the rider heights it fits.
Charts are a starting point — frame geometry varies by model, so use it as a guide only.
Free standard delivery is available to most mainland UK addresses on qualifying e-bike orders. Highlands, islands, Northern Ireland and remote postcodes may cost more or take longer, and we confirm this before dispatch. Your e-bike is securely packaged for transport, and we send the available tracking information once it is on its way. Full details are on our Free UK Delivery page.
All our e-bikes come to us from UK and European makers and wholesalers, and are covered by the manufacturer's warranty. If you ever need to send something back, please contact us first so we can arrange the return.
- Lifetime limited warranty against defects in materials and workmanship, to the original owner
Your employer buys the e-bike; you repay it from your gross (pre-tax) salary over 12–18 months. Because the payments come out before tax and National Insurance, most riders save 25–40% versus the sticker price. At the end you keep the e-bike for a small final payment.
- You are eligible if you are employed, earn above the National Minimum Wage after the deduction, and your employer runs a scheme (Cyclescheme, Green Commute Initiative and others)
- There is no longer a £1,000 cap for most schemes
- Self-employed, or want the simplest option? Interest-free finance and Klarna — Buy Now, Pay Later spread the cost at checkout, with no employer needed
Read the full E-Bike Finance & Cycle to Work guide or see finance options.