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Hope RX4+ Flat Mount Front +20mm Mineral Oil Brake Caliper Disc Brakes - Rear Brakes | Bike-Discount
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Reviewed: Hope RX4 hydraulic brake calipers – six pence stopping for a lot more than six pence - Singletrack World Magazine
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Amazon.com : HOPE Rx4+ Disc Brake Caliper Black, Flat Mount Front + 20 Mineral Oil : Sports & Outdoors
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Hope RX4 Brakes Bring Four Piston Power to Drop Bar Bikes [Review] - Singletracks Mountain Bike News
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