Thread: Trek Multitrack 750 Seat post size?
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Old 12-23-18, 10:13 PM
  #16  
Nu2Miele
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hi, use a fabric measuring tape
Measure the circumfrence if possible, or use a thread to measure the opening, then measure the thread. I can use a caliper on my laye 80's early 90's 950. As above just divide the circumfrence by pu (3.14156 or so)
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