Don't think GP4000 do 32mm, only 28mm.
Measured way bigger, closer to 31mm.
The 25mm measured closer to 28mm.
https://www.lfgss.com/comments/14487299/
I know, some batches were massive, some were close to sizes as intended.
The 25mm GP4000sII on a normal 15mm rims is around 27mm.
@hippy started
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Measured way bigger, closer to 31mm.
The 25mm measured closer to 28mm.