Bells of Steel Competition Kettlebells
Cast iron competition bells accurate to ±100 or ±200 grams, from 4 kg to 48 kg, with a limited lifetime warranty.
Specs
| Total height | 11 in (280 mm) |
|---|---|
| Diameter | 8.2 in (210 mm) |
| Handle diameter | 34 mm (4, 6, 8 kg) or 35 mm (10 to 32 kg, 48 kg) |
| Window size | 58 mm (4, 6, 8 kg) or 60 mm (10 to 32 kg, 48 kg) |
| Material | Cast iron |
| Coating | Powder coat |
| Accuracy | ±100 g (4, 6, 8 kg) or ±200 g (10 to 48 kg) |
| Warranty | Limited lifetime |
These figures are copied from Bells of Steel’s own published specs and were last checked on 2026-08-31. Manufacturers revise products without notice, and variants differ. Confirm anything your decision depends on with Bells of Steel before you buy.
Choose this one if
- You train the kettlebell lifts and want consistent dimensions across weights
- You want accuracy stated in grams rather than as a percentage
- You want a range that starts at 4 kg and reaches 48
The detail
Publishing accuracy in grams rather than as a percentage is the more useful way to state it, and Bells of Steel does: ±100 g on the light bells and ±200 g from 10 kg up. A percentage sounds tighter on a heavy bell and looser on a light one; absolute figures tell you exactly what you are getting. Two hundred grams on a 24 kg bell is well inside 1%.
Identical shell dimensions at every weight is what makes a bell "competition" — 11 inches tall, 8.2 inches across, at 4 kg and at 48. A cast kettlebell grows as it gets heavier, which changes the rack position and the swing path every time you go up. A competition bell puts the extra weight inside the same shell, so technique transfers directly.
The handle steps only slightly: 34 mm on the three lightest bells, 35 mm on everything else. That is a small, deliberate difference — the light bells are often used by smaller hands — and it is a millimetre rather than the substantial thickening a cast range gives you.
The window size (the gap your hand passes through) follows the same split: 58 mm on the light bells, 60 mm above. That is what determines whether the bell clears your forearm cleanly in a snatch, and whether a gloved or taped hand fits.
A 4 kg to 48 kg range is genuinely wide at both ends. Four kilograms is a teaching and rehab weight; 48 is heavy enough for anyone.
Powder-coated cast iron with a limited lifetime warranty — on a solid iron object the warranty is really about the coating.
Compare the Rogue competition kettlebells at a 33 mm handle throughout and ±1%.