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forum
Rear mech sizes and cassette sizes
Please can anybody offer advice. Is there a 10 speed Ultegra rear mech and 11/12 - 32/33 cassette?
If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.
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8 comments
Why not pick up a wilifi kit from SRAM?
The op is obviously a Shimano man , and if you go mtb it's cheap as chips , you can do it for under 50 quid if you wanted to
Why don't you go for a 9 speed mtb slx cage ?
Reason I ask is it sounds like you want the weight saving ( although on a mech it's negligible) if you go with an mtb mech you canrun a 12-34 rear tiagra cassette if that's what you really need ( I used this setup in the alps this year as I much prefer seated climbing and spinning )
Thanks for your help guys.
A new question now is what's the difference between Shimano RD-5701 (GS) and RD 5700 (GS)?
Depending on your answers, it looks like I will have to remove the Ultegra rear mech and replace it with 105 RD 5700 or RD 5700 GS version and a new cassette 11 - 32 from SRAM (1050 or 1070). Is this part correct?
Thanks in anticipation.
The 5700 GS is the older model and is only rated to max 30t cog; the 5701 GS is rated max 32t. It might seem surprising that the 5700 has the same max cog in both short and medium cage lengths - but the older medium cage was there to increase the chain wrap capacity. So it's the 5701 GS you want.
As for PG1050 vs 1070 - either works, they are sold in different cassette sizes. The numbers here indicate the range the cassette belongs to - PG1050 is Apex, PG1070 is Rival. I went with a 1070.
As per Bazzargh above I have used 105 5700 GS rear mechs with 11-32 and 12-32 apex cassettes. This is with both 50/34 and 30/40/50 up front. Not sure how the different hangers on bikes would effect the working mind. If you can't get a 105 GS to work the an old 9 speed deore should do the trick.
The 6700 is max 30t cog though. I was looking for the same setup at the start of the summer, ended up replacing my 6700 with a 105 RD 5701 GS (med cage) and the SRAM PG1070 cassette mentioned. Higher end parts at low gear ratios from shimano are in their mtb range
Ultegra 6700 is 10 speed, 6800 is the 11.
The usual places I use online (Ribble/Wiggle/Merlin etc) have stock of the mechs.
Never seen a 12-32/33 Ultegra cassette about, Sram do 12-32 in the PG1070 I think.