cut the outside row of spikes off all spiked tyres if it grip rolls... or start with cutting every other spike as a tester
cutting the inside row of spikes can further help if its still digging in and with both 2WD and 4WD you can eliminate too much steering by trimming further rows off front tyres.
A bit more camber can help stop grip roll too, but too much will cause 'roll' and sliding... i run at least 1 deg negative up to 2 deg negative max.
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