People Should Measure things in person..


Now Seatpost sizing shim sleeves are commonly found, machined,

inside diameters fall into 2 choices 1" 25.4mm.. or 27.2mm..

so there are shims to use a 1" seat post in a lot of different frame ID including 27.2mm

then shims for that or 27.2. to go in oversize seat tube frames...

(I have 3 bikes built up with 27.2mm posts in larger seat tubes..)


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