As far as stock, there were no 32p choices- just the standard cluster used on all optima and ultima. A few people on rc10talk have used the traxxas hawk/sledgehammer cluster gear 1884 (comes with a new shaft also, takes 5x11 bearings) as an inexpensive replacement and it offers a different ratio than stock. Here is a quote from rc10talk about it....
Quote:
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... It is a 44t main gear/20t secondary. This changes your ratio with the stock counter gear to 2.73. The gear comes with a tapped 5mm shaft, you just have to drill your motor plate a new hole ~.75 (maybe an extra .0625 or so mine meshed to tight.) from the center of the top shaft.
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And a link....
http://www.rc10talk.com/viewtopic.ph...33609&p=364761