As Bike Cars Overflow, Caltrain Bans Large Bikes and Panniers - Streetsblog San Francisco

"Caltrain's bike cars are designed to carry 36 bikes safely and efficiently (four bikes per rack). Oversized bikes are not allowed onboard to maximize the number of riders with bikes on board."

"Some bikes take up more space than the racks are designed for, including: Wide or extra‑fat tires (more than 3 inches wide), Extra‑long frames or wheelbases (a bike cannot be longer than 6 feet), Cargo bikes, longtails, and extended e‑bikes, Attachments such as baskets, panniers, child seats, or trailers."

"As with the ever-bloating size of cars (SUVs & trucks) on our streets, due to a similar trend of increasingly oversized/overweight e-motos, e-bikes, and maybe a few larger/wider acoustic bikes and their attachments being brought aboard, there were increasing complaints/issues raised by crews and/or other bike car users about their disproportionate use of rack space & longer boarding times."

Caltrain implemented new bike restrictions limiting bicycles to specific dimensions to maintain capacity in its 36-bike cars. The policy prohibits cargo bikes, longtails, extended e-bikes, and bikes with wide tires over 3 inches or frames longer than 6 feet. Attachments like panniers, baskets, child seats, and trailers are also banned. Advocates argue these restrictions exclude practical commuter bikes and prevent families with children from using the service. The railroad justified the policy citing complaints about oversized bikes taking disproportionate rack space and increasing boarding times, though detailed policy discussions were not shared with advisory committees beforehand.

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