Originally Posted by
HTupolev
Yep. 4700 is basically a Shimano 10-speed cassette and a Shimano 11-speed rear derailleur, paired to a unique shifter that makes that combination work.
Originally Posted by
faulker479
5700 and 6700 do not have the same pull ratios for their shifters and derailleurs. However, there is GRX 10 speed that is brand new and is compatible with the Tiagra.
Again, go with the color frame you like best of the two. They only do one color for each group level. Once you wear out the drive train you can get the next latest and greatest.
Originally Posted by
mstateglfr
current Tiagra is on an island. It isnt compatible with other 10sp components.
Oh wait, really? That is so dumb!
So that means the Tiagra 4700 shifters and derailleurs have 11-speed type cable pull, and the 10 speed Tiagra cassette has the same sprocket spacing as an 11-speed cassette? Why the hell would they do that?! Perhaps so they can manufacture the Tiagra cassettes with the same parts as their 105 cassettes, just one extra sprocket? Probably saves them manufacturing cost? Weird.
Thanks for the heads up, I had no idea. I will go 105 for sure in that case.