on the xxx4 some people used overdrive on the rear (initially tried on the advise of gill losi jnr at the bury nat 05 when Travis 3 Jukka came across after the worlds warm up)
The idea was to give a 50/50 drive. Schu rears have a smaller diameter than the front when standars width rear tires are stretched over wide rear wheels
some liked the mod others didn't
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