Does anyone know the measurement of the channel in the 8020 and the 8040 (i would imagine they are the same). I am looking to buy some and would like to make sure they match what i already have (already made the mistake once). I cannot seem to locate the specs on the store site.
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I found the channels on 20-20 and 40-20 from 80/20 Inc to be a hair over 5mm, which did not fit my OpenBuilds extreme wheels. the wheels did fit the Chinese struts, which had a 6mm slot.
The extreme V wheels are designed for v-slot aluminum profile not the t-slot from 8020. 8020 does make their own wheels, but holy crap the price is outrageous for one wheel with bearings! Roller Wheels - Panels & Door Components
Not to mention, will be forced to have slop in order to move. V-wheels are inherently superior because they self-center and as you tighten them up, any transverse movement is eliminated without binding against anything.