Good day guys,

I was wondering if I could get some help with building a budget drivetrain. I currently use Micronew 3x7 STI Shifters with Tourney FD & RD which is 3x7 speed.

I plan on upgrading for a 3x10 drivetrain.

i would still use a 3x10 STI shifters from Micronew since it is the cheapest in my country. Wouldnt need to change my FD, but for the RD, would the LTWOO A7/A7 Elite RD be compatible with these shifters? (since its the cheaper option for most 10speed RDs)

I'm worried about the pull ratio since it might be different. I have read somewhere that you can mix and match Shimano STIs and MTB RDs up until 9 speed, but anything higher would not be compatible. I know both LTWOO and MicroNew are not Shimano, Im thinking if that same rule applies to both of these being 10speed.

Any thoughts on this one?