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These sections were removed at the request of Mayor Randy Rowse, who said that allowing bikes on sidewalks at all would be sending a confusing message. Other last-minute tweaks included a change to the fines which would start at $100 for a first offense and increase with consecutive violations within a one-year period and clarifications regarding group rides, which would still be allowed under the new ordinance

Fiberglass will withstand even heavy impacts and can be bent to significant angles before it fractures

Aquat Toxicol 164:163174

And the only really heat-resistant shells we know of are fiberglass, not the plastic Casco is using