Bells of Steel Rubber Crumb Filler
Best eco-friendly filler for athletes seeking consistent, lightweight sandbag training.
This recycled rubber filler is the smarter, cleaner alternative to traditional sand. It creates a softer, more forgiving impact for your gear while maintaining consistent weight distribution. Just keep in mind that its lower density means you'll need more volume to hit your target weight.
$93.99
at
Bells of Steel Official Website
Who it's for
- Athletes seeking a dense, stable, and compact punching bag
- Gym owners needing durable, moisture-proof filler for humid environments
- Eco-conscious shoppers prioritizing sustainable, recycled gym equipment
Who should skip it
- Users with sensitive noses or limited indoor ventilation
- DIYers wanting a clean, mess-free filling experience
- Health-focused individuals concerned about potential chemical exposure
Performance breakdown
Impact absorption
Rubber crumb provides a forgiving, soft landing for high-intensity training sessions.
Weight consistency
Material density remains stable, preventing the shifting common with traditional sand.
Sustainability profile
Repurposing discarded tires significantly reduces waste compared to mined sand fillers.
Ease of filling
Uniform 1-3mm crumb size makes pouring into bag liners remarkably clean.
Volume-to-weight ratio
Lower density requires more volume to achieve heavy, competition-grade bag weights.
Durability
Synthetic rubber resists moisture and breakdown better than organic or granular alternatives.
Key Specs
Material
Recycled tire rubber
Weight
40 lbs
Granule Size
1-3 mm
Origin
Made in Alberta
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