My chart says with e SPv3 7.5 you need a ratio of 7.5-9.0.
With kit spur of 83 you'll get a 24 pinion on which is almost in just in that range with 8.99.
You really need to get hold of a 78 spur (RW), to get into that ratio band a bit easier. You'd then be able to run a say 25 pinion to get a 8.11 ratio.
|