Ultegra SL 6601.... Why the SL?
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Ultegra SL 6601.... Why the SL?
What's the difference b/t a SL and non-SL Ultegra series?
More specifically, the crankset. I think the 6600 is more DA like. But the 6601 (SL) is black.
More specifically, the crankset. I think the 6600 is more DA like. But the 6601 (SL) is black.