Tiagra v Sora

staituk

Hi I was reading that Sora is a 9 speed system and that Tiagra is a 10 speed system. But I have Sora on my bike with a 9 speed cassette but the rear derailer is a Tiagra so why would they mix things up on the bike?

david7m

Don't know, but if MF comes along saying it inferior groupset, just ignore him

cougie

Your rear mech doesn't know what speed it is. It just moves along as the cable pull tells it. Mixing and matching is fairly common and nothing to worry about.

Matthewfalle

david7m wrote:

Don't know, but if MF comes along saying it inferior groupset, just ignore him

nah - tiagra & sora are what they are - solid, bombproof, no hype, work well, no hyperbole, well priced. do a job and do it well.

but as above - its just a mech that does what the shifters tell it to do.

#solid

StillGoing

Could also simply be an old stock 9 speed Tiagra rear derailleur.

Matthewfalle

picture so we can see?

#photography

mugensi

Tiagra 4400/4500 was 9 speed so it may be an older RD but saying that a 10speed RD will work fine with 9speed shifters and vice versa. I ran Tiagra 4600 10spd shifters with a 4500 RD and it worked perfectly.

kingstongraham

Matthewfalle wrote:

#photography

I don't care what anyone says, this is still #funny.

keef66

MugenSi wrote:

Tiagra 4400/4500 was 9 speed so it may be an older RD but saying that a 10speed RD will work fine with 9speed shifters and vice versa. I ran Tiagra 4600 10spd shifters with a 4500 RD and it worked perfectly.

But note that the current 10 speed 4700 Tiagra with the under bar tape cable routing has a different cable pull, so the shifters and mech won't play nicely with older 10 speed stuff, or indeed 8 and 9 speed.

It is compatible with the dearer, newer 11 speed groupsets above it though

willhub

I've gone through umpteen Tiagra shifters due to cable snaps.

keef66

willhub wrote:

I've gone through umpteen Tiagra shifters due to cable snaps.

You do know you can replace the cable and keep the shifter??