Neck Weight v1 — Modular Lead-Filled Bike Tube Neck Weight

Proven

A DIY Neck Weight with a fixed neck collar and modular additional weights.

In this example, the target weight is 4.5kg:

• 3kg neck collar
• 3x0.5kg modular weights

Reference images

Neck Weight Modules	Neck Weight Assembled

Neck Weight Clips	Neck Weight Presentation

Time needed

Technique	Implementation	Waiting
Creating the Neck Collar Creating the neck collar	0.25 h	0 h
Creating the Modular Weights Creating the modular weights ×3	0.3 h	0 h
Total	0.55 h	0 h

Bill of Materials

Technique	Material	Quantity	Unit Cost	Line Cost
Creating the Neck Collar Creating the neck collar	Bike Inner Tube 26" Consumable	0.4 tube	£6.49 per tube 26in	£2.60
	Loose Lead Consumable	3 kg	£8.50 per kg	£25.50
	Quick Side Release Buckle 50mm Consumable	1 unit	£6.00 per buckle	£6.00
	Electrical tape roll Consumable Wide PVC tape to join acrylic seams	1 roll	Inexpensive
Creating the Neck Collar total				£34.10
Creating the Modular Weights Creating the modular weights	Bike Inner Tube 26" Consumable	0.6 tube scaled ×3 — base 0.2 tube	£6.49 per tube 26in	£3.89
	Loose Lead Consumable	1.5 kg scaled ×3 — base 0.5 kg	£8.50 per kg	£12.75
	Hook Buckle 50mm Consumable	3 unit scaled ×3 — base 1 unit	£3.20 per buckle	£9.60
	Electrical tape roll Consumable Wide PVC tape to join acrylic seams	3 roll scaled ×3 — base 1 roll	Inexpensive
Creating the Modular Weights total				£26.24
Consumables subtotal £60.34	+	Reusable subtotal £0.00	=	Grand total £60.34

Tools Required

Tool	Techniques	Purpose
Funnel	Creating the Neck Collar Creating the Modular Weights	To channel the lead into the tube
Scissors	Creating the Neck Collar Creating the Modular Weights	Cut materials like fabric, film, or templates to size

Instructions

1. Create a neck collar to serve as the base. See Creating the Neck Collar.
2. Create 3 additional modular weights to fine tune your buoyancy. See: Creating the Modular Weights.