700 * 32C tyre on a new Silvio S30

super slim

Zen MBB Master
Are you on an ACA tour, as that is who I rode with down the West coast of USA.

A Very good company with great leaders, great routing to see all the great scenes, and exceptional maps!
 

tiltmaniac

Zen MBB Master
Yup, ACA. The east coast is very.. urban so far so there is a limit to beauty, but it was the only tour that fit my availability.

In answer to the original question: According to the allen keys,
2 or 3 mm clearance on the top.
4mm to 4.5mm clearance on the sides.
 
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