The R539 is an excellent dual pivot caliper brake for road bikes. Made of forged aluminum arms, this caliper is solid, yet only weighs in at 160grams each. The R539 features Tektro’s new lock device QR. Standard calipers don’...
Strengths: Good level of finish. Nice design clear fenders and opens up wide to remove wheel.
Weaknesses: Dangerously feeble. Do not use for high speed descents.
I wonder if there are manufacturing variations in this brake? Rivendell seems to love it. It looks well made and the finish is nice. The problem is there's way too much flex in the arms. Very spongy feeling at the lever, and no power despite attempts to optimize them by a pretty experienced bike mechanic (me). Tektro makes some good products, but this is not one of them.
Anyone know what the difference is between these two in terms of intended use/overall performance?? and maybe even can compare them to the Shimano R650s??
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