Original price
CHF 308.00
-
Original price
CHF 915.00
Original price
CHF 0.00
CHF 308.00
Incl. Tax
CHF 285.19
Excl. Tax
Final price varies by tax rate.
CHF 285.19
-
CHF 847.22
Current price
CHF 285.19
Excl. Tax
Final price varies by tax rate.
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Increase the Weight. Keep the System.
The Strength Shop Extension Kits allow you to upgrade your existing Adjustable Dumbbells to a higher weight range — without replacing the handles or starting from scratch.
Each kit includes precisely the components required to reach the next configuration. The adjustment mechanism, balance, and feel remain exactly the same: only the maximum capacity increases.
All kits are fully compatible with the Strength Shop Adjustable Dumbbell system.
Upgrade Options
20 kg to 36 kg – Increases a 20 kg dumbbell pair set up to a 36 kg set (Contents: 16 × 2 kg plates)
20 kg to 49 kg – Increases a 20 kg dumbbell pair set up to a 49 kg set (Contents: 28 × 2 kg plates, 2 × pair of long bolts 1.5 kg)
36 kg to 65 kg – Increases a 36 kg dumbbell pair set up to a 65 kg set (Contents: 28 × 2 kg plates, 2 × pair of long bolts 1.5 kg)
20 kg to 65 kg – Increases a 20 kg dumbbell pair set up to a 65 kg set (Contents: 44 × 2 kg plates, 2 × pair of long bolts 1.5 kg)
Why Upgrade Instead of Replace?
Expand progressively as your strength increases
Keep your original handles and hardware
Maintain identical handling and balance
Save space and cost compared to buying a second set
The system is built to grow with you
FAQs
Q: Do I need to buy a completely new dumbbell set to increase the weight? No. The extension kits are designed specifically to upgrade your existing Adjustable Dumbbells.
Q: Can I upgrade in stages? Yes. For example, you can move from 20 kg to 36 kg first and later expand further.
Q: Are the plates identical to the original ones? Yes. The extension plates match the original plates in material, dimensions, and finish.
Q: Do the kits include handles? No. The extension kits include only the listed weight plates required for the upgrade.
Q: What is the weight range for the different bolt configurations? The dumbbells can use two bolt configurations depending on the total weight:
Standard bolt (1 kg): adjustable from 4 kg up to 36 kg Extended bolt (1.5 kg): adjustable from 39 kg up to 65 kg
Customer Reviews
Overall rating: 4.6 / 5 from 8 reviews.
These dumbbells are fantastic once you understand the weight jump mechanism you can adjust them very quickly, they have a fantastic grip I don't use chalk even with heavy rows. The plates don't move and above all they are really compact the movements are all in full range. Strenghtshop I love you!
Sturdy, high quality, very stable, they go very heavy, a joy to work out with. No complaints there at all.
Big downside: very annoying to load if you need to switch weight ranges.
With the short pins, the dumbbells go from 6kg to 36kg or so; if you need to load more weight, you have to completely screw the short pins out of the handles, and screw in the long pins.
The long pins have a starting weight of about 34kg, so always using the long pins is not an option. Going from short to long (36-65kg range) takes an easy 5-6 minutes if you are fast.
In practice, this means: if you warm up for e.g. RDLs, you will have a major break between your warmup sets before you can go heavy, which really hurts the flow.
The weight ranges (= minimum weight for the long pins) should really be documented on the store page. Had I known that, I would have probably gotten regular handles, plates, and collars instead, they load much faster and are quite a bit cheaper.
Noteworthy: I reported this to strengthshop, and they immediately offered me my money back if I send the dumbbells back in their original packaging (which I did not do, they feel very nice while training if you can stay in one weight range). Super service.
If the annoying load range switch is not an issue to you: 100% recommendation.
Store owner replied:
Thank you for your feedback! We have since added this information to our page. We appreciate your input a lot and even though this is a significant trade-off we believe these are the best value adjustable dumbbells on the market.
Great for the money. For me, the knurling is perfect and I have no issue with the balance. The only reason for not giving it a 5/5 is that if you go below 42kgs, you need to change screws. Changing the screws takes a while and is a bit of a pain in the ass. If you're looking for a 42kg-65kg or 4-42kg they're 5/5 but 4kg-65kg is a bit of hassle.
Very safe to use for all kinds of exercises, even explosive ones such as snatches and cleans. These save tons of space, obviously. Two slight drawbacks: The square shape is somewhat inconvenient in some exercises (but it is the safest, admittedly); and the lack of a rubber wraparound may prove painful if you are not careful (e.g. when cleaning the dumbbells and placing them on the shoulders).
Store owner replied:
Thank you so much for the detailed feedback! We're glad to hear you're finding them safe for explosive movements like snatches and cleans, and that they're saving you space too.
We appreciate you pointing out the drawbacks as well, that's really helpful for us and for other customers considering the product. We'll take your comments about the shape and the wraparound into account as we keep improving.
Thanks again for taking the time to share your experience!
Brilliant Quality! and the heaviest adjustable dumbbell set ive seen - Really happy with these, they are just as advertised, it seems very difficult to find dumbbell sets that go past 45kg per dumbbell, now this set going up to 65kg per dumbbell is great! goes well with your heavy Duty Bench too, thanks :)
Loosen the locking screw slightly (no tools needed), slide the plate, and re-secure -its super easy to switch between loads.
What are the adjustment increments?
The dumbbells use 1 kg and 2 kg plates on each side. Since both sides must be loaded equally, the total weight changes in 2 kg or 4 kg increments.
Do I need a special tray or base?
No. The dumbbells can be used and stored directly on the floor.
Are the handles stainless or chrome-plated?
They are chrome-plated steel, combining corrosion resistance with a premium finish.
Are they suitable for heavy pressing and pulling movements?
Yes. The design provides the same balance and feel as a fixed dumbbell, suitable for pressing, rows, curls, and accessory lifts.
Can I upgrade my dumbbells in the future?
Yes. We will add individual components soon, so you can start with any set, such as the 20 kg version, and later expand to a heavier range by purchasing additional weight plates separately. The system is designed to be upgradable, allowing you to increase total capacity without replacing the entire dumbbell.