shimano 105 5700 and ultegra with tiagra cassette,help please

[jackthelad]

guys was wondering if you could help does the 105 5700 or ultegra triple groupsets work ok with the 12-30 tiagra cassette or do you need to change the rear derailler and chain

any help appreciated

jackthelad

 

[rb58]

I put the Tiagra 12-30 4600 cassette on my Ultegra triple 6700 (long cage) for a while and it worked fine. I didn't have to alter the chain length and there was plenty of clearance between cassette and jockey wheels. I think the Shimano spec is a little conservative with what you can get away with.

 

[PpPete]

If I understand correctly you have a triple groupset already? and want to go to a "bigger" cassette ?
1 .... ignore any suggestion that you need to MTFU, there will always be at least one who says you don't need it. If you want gears with that wide a range I'd say go for it.
2. if you have a triple then the mech will be a "GS" model (medium cage actually - not long cage) anyway, so no issues there, as rb58 says, Shimano specs are conservative. Chances are you might even get away with an Apex 11-32 cassette.
3 Put it all together, make sure your limit screws are set correctly, and CHECK the chain length before you ride it.
I went from a 12-27 to a 12-30 and needed an extra link. I didn't find that out until I inadvertently went to big ring/big sprocket and completely locked the drive train.

 

[jackthelad]

guys thanks for the replies,I have not bought the groupset yet and looking between 105 and ultegra 10speed triple
I got away putting a mtb rear derailler,11-32 cassettte and sram 971 114 link chain on the wife bike (9 speed) but i know it is a little different for 10 speed.I understand about some people saying you dont need that high a gear but it is a light weight tourer and touring brings with it very steep hills.

 

[PpPete]

The Shimano triples are too big for touring IMO. The Stronglight Impact Triple or this clone are a better bet... and yes they do work just fine with Shimano front mechs.

 

[jackthelad]

HNi Pete thanks for posting,I had looked at spa cycles for lower chainsets,but then looked at ribble groupsets.To buy the individual parts like sti shifters etc I thought going the spa route would work out expensive,any more help appreciated to get sorted
I would prefer the 48/38/28 on stronglight but seems it is unavailable at the moment