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stable performance)
requires correct cage selection for cassette size
improved chain stability compared to older 105 models
Specification Details Brand Shimano Model BR-MT520 Type Hydraulic disc brake caliper Pistons 4-piston (opposed design) Mount Type Post mount Fluid Shimano mineral oil Compatible Levers BL-MT401 / MT501 / MT520 Recommended Rotors SM-RT70 / SM-RT66 (varies) Rotor Sizes 160mm – 203mm Pad Type Resin or metal (D03S / D02S variants) Use MTB
Not a full workshop stand
Selle San Marco Saddle 2026 Winter Sale stable performance)
US$ 21.75
US$ 27.00
US$ 21.75
US$ 174.00
