Originally Posted by Markb_s1
thanks folks.. hadn't considered heat
.. i think i'll be heating the centre though... not sure i trust the idea of heating the alloy rim.
You will only be taking the chill off of it with a heat gun, no where near hot enough to alter the properties of the alloy..
and if you heat the centre section it will expand and jam it tighter into the outer rim. You need to heat the outer rim so it expands and losens its grip on the centre section.