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Discussion Starter · #1 ·
I recently picked up a 2017 Giant Trance 4 for my girlfriend, it's a brand new bike, never been owned and bought from a Giant Dealer.
I want to upgrade the brakes on it (Shimano M315) to Shimano Deore M6000. Can I just leave the existing brake lines in place and only replace the calipers & levers? especially for the rear brake as it's internally routed. Looks like the M315 & M6000 use the same fittings on the levers/calipers.
Is this acceptable?
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