I'm running a 14x2 (as the 12x2 were out of stock at the time) so I'm not too fussed now. Best I can get is the 22/89 and that should be fine. I can put the larger spur on for shorter circuits but if I hit a BIG one, I can see my brushed baby taking a bit of a beating!
My main reason for making this post in the first place was that I was shocked that I could not physically achieve the gear ratios in the manual. I could understand if I had got cocky and bought a tiny one intended for a little race car or something but the 86 spur is in the manual with a 19 tooth pinion.
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