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Unclear if you question regards axle diameter or hub width.
If hub width -
You do not state the over the locknuts dimensions of the new wheels, nor the originals. Would have expected the OEM wheels to be 100mm front and 120mm rear. But since they are 26 X 1 3/8" wheels the front may be somewhat narrower than 100mm. Styria may have employed an Union front hub for the bicycle.
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Last edited by juvela; 02-27-17 at 07:47 AM.
Reason: addition