- Tiagra/Ultegra 10 speed compatibility
Hi, looking for help on a potential bodge 🙂
I have a Tiagra 4700 short cage rear derailleur – currently running an 11-28 cassette. I’m looking to go for a more spinny gear but i’m not sure if either of these cassettes will work ok? or if I would need a new rear mech.
– Shimano Tiagra 11-32 HG500
– Shimano Ultegra 12-30 6700
The bike it’s going on is a Trek Emonda ALR 2016 with a compact 50/34 chainset
CheersPosted 4 months ago
It won’t work with your current short cage mech – you’d need the longer mech.
See specs for details.
LongPosted 4 months agojonnyboiMember
short cage will ‘probably’ work on the 32Tbut it depends on your hanger and how much b screw you have to play with.
plus depending on the front rings you use it could be pretty damn tight if not locked in big/big. I’ve seen a short cage mech work with an 11-32 cassette with 34t chainring but not be able to cope with big/big on a 46T outer.
TBH I would just buy a mid cage mechPosted 4 months agotillydogSubscriber
I’m looking to go for a more spinny gear
The 30 tooth cassette will only give you “half a gear” more – will that qualify as ‘more spinny’?
The 11-32 Tiagra cassette will give “one gear” more, but has an annoying (to me*) gap at road speeds as it doesn’t have a 13T sprocket (it goes 11 – 12 – 14).
*I replaced the 11T & 12T with new 12T & 13T sprockets to give me 12-13-14 and don’t miss the 11T ever (50/34 chainrings).Posted 4 months ago
Now i’m a little confused – will the Ultegra 10speed 12-30 cassette not work with a 4700 rear mech then?
I know its not a long more ‘spinny’ but I think it may make a bit of a difference here in Yorkshire… plus I need a cassette for the turbo so may as well chuck the older cassette on that and use the better one for going outside with.
Cheers.Posted 4 months ago
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