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03.30.2010, 02:19 PM
The size of the spur gears you can use is listed & discussed a few pages back, have a quick look through. The ofna diff is arguably better as it has a metal case, but I've only ever seen 1 plastic 1/8 scale diff case thats become damaged inside and had to be replaced. Just one...
Which size spur you actually use is just a question of gearing for a certain speed with a certain kv motor and certain sized tires etc- use BrianG's calculator to determine what sizes you can use ( bearing in smind the size/ tooth count limited and pitches- 32p or Mod1.0 ).
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