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Universal Cycles -- Shimano BR-R451 Mid Reach Brake Caliper [EBRR451AF73XS, EBRR451AR73S, EBRR451AF73XL, EBRR451AR73L]
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shimano - Modern long reach calipers on old bike, strong enough for safe braking from the hoods? - Bicycles Stack Exchange
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Shimano BR R451 Brake Caliper R451 Road Bike BMX Bicycles Brake Caliper Front & Rear BR R451 C Brake Caliper 47 57mm| | - AliExpress
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Amazon.com : SHIMANO R451 Rear Mid- Reach Road Caliper, Black : Bike Brake Calipers : Sports & Outdoors
![Universal Cycles -- Shimano BR-R451 Mid Reach Brake Caliper [EBRR451AF73XS, EBRR451AR73S, EBRR451AF73XL, EBRR451AR73L] Universal Cycles -- Shimano BR-R451 Mid Reach Brake Caliper [EBRR451AF73XS, EBRR451AR73S, EBRR451AF73XL, EBRR451AR73L]](https://www.universalcycles.com/images//products/small/95013.jpg)