ITEM NAME:Aluminum Alloy Bicycle U Brake Caliper Rear Long Arm Brake Caliper Aluminum G7J4 Aluminum Alloy Bicycle U Brake Caliper Rear Long Arm Brake Caliper Aluminum G7J4 Made of heavy-duty aluminum alloy to ensure long-term use. Suitable for bicycle rims such as 24 * 1 3 / 8, 26 * 1 3/8, 27 * 1 3/8, big line BT410 and other folding vehicles Light weight, durable and variable braking force. The brake pads are made of wear-resistant rubber, which reduces noise and good braking power in wet and dry.Suitable for bicycle rims such as 24 1 3 / 8, 26 1 3/8, 27 1 3/8, big line BT410 and other folding vehicles. 1 bicycle rear brake clamp. Material: aluminum alloy + rubber. The brake pads are made of wear-resistant rubber, which reduces noise and good braking power in wet and dry conditions.