Shimano SH-GE900 SPD Shoes - EU 43 - Midnight Denim YGroup_7034187513901 The bungee is actually tuned

The bungee is actually tuned very soft so it can be used for almost any activity including towing kids on bicycles to make it a one size fits all product

Each rack includes enough bungee cords to safely secure your bike to the rack

and length marks if you needed to cut them down

The question was can one single rubber compound provide this

Full curing time 24hrs

Shimano SH-GE900 SPD Shoes - EU 43 - Midnight Denim YGroup_7034187513901 The bungee is actually tunedShimano's benchmark, high end gravity shoe, the GE9 features a TORBAL 2. 0 midsole that allows the heel section to move torsionally, maintaining full range of motion for improved comfort, fluidity, and on bike control. Enduro optimised ULTREAD GE outsole delivers enhanced grip on slippery hike a bike sections, and has a moulded pedal channel that provides a stable shoe to pedal connection even when riding unclipped on technical terrain. Features