irenL 0 Posted November 7, 2008 I've recently obtained a 53251 Acto-Tuned M-spacial motor.. Thing is, insteadof bolting it onto an M01/02, I'm bolting it into an M03. The motor's card states that 18T is the suitable pinion for the low profile tyres, and 16T pinion for 60D tyres. Now, since I don't have either M01/02, I'm actually wondering what kind of final gear ratios is available on this chassis, so I can do a similar ratio in the M03. M03 gear ratios with stock internal reduction are as following: 16T = 7.19:1 18T = 6.39:1 20T = 5.75:1 Share this post Link to post Share on other sites
tony gray 0 Posted November 8, 2008 I have a vague memory that the M01/02 with a 20T pinion is 5.65:1 Share this post Link to post Share on other sites
irenL 0 Posted November 8, 2008 I have a vague memory that the M01/02 with a 20T pinion is 5.65:1 hmm, having made some calculations, that means: 16T in M01 = 7.06:1 18T in M01 = 6.27:1 not much of a difference.. will experiment then... Share this post Link to post Share on other sites