I'm all for geared diffs. I need to run a loose rear diff to keep the corner traction with a 6.5 to keep the pace up. This results in either a cooked slipper or a cooked diff, so the diff has to be compromised. The extra rotating mass has a negligble effect when taking into consideration the size and weight of the wheels and tyres so I wouldn't class it as a dissadvantage. 1/8th and 1/10 nitro on road have been using geared diffs for years and rotating mass is as critical, if not more so for these.
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Mark Dyson
Clown
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