I definitely have an aggressive set up. I am on a 49" frame and I am 5'6". I have all but one spacer removed on the stem. I would absolutely have a fitting with your LBS. Fortunately, we have an excellent triathlete at our store who fitted me. I thought the frame was going to be a little small but it worked out perfectly. I have won my age group in the last two Olympic triathlons I did for fun...no taper (I am training for IM AZ) averaging 20mph or more (I am 41 years old). Hope that helps...
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