11 June 2012 ~ 4 Comments

New Shimano “Climbing” Gear

I have been waiting for Shimano to introduce an Ultegra-level compact double “climbing” cassette and derailleur. They finally came out with a matched set. Just this week, my latest wholesale catalog lists the following 10-speed parts:
Ultegra CS-6700 12-30t Cassette
Ultegra RD-6700A 30 tooth (40 wrap) Derailleur
Yahoo. I’m just in the process of building up a new/used Ti bike and plan to put these parts on it.

My current set-up on my carbon bike has a 11-28 cassette with a 50/33 crankset (yes a special  French-made 33 and not the usual 34, which I sell on my Distance Biker site). Shimano has always had the 12-30 Tiagra cassette, but it is heavy as it made from steel instead of alloy as with the Ultegra-level cassettes. And, using the old Ultegra or 105 derailleur this cassette was problematic as the cage wasn’t quit long enough.

4 Responses to “New Shimano “Climbing” Gear”

  1. Bob 12 June 2012 at 3:00 pm Permalink

    Looks like some welcome products for those using a 10 speed drive train. One reason I went from 10 to 9 a couple of years ago was to take advantage of the custom 13-30 cassette offered by Harris Cyclery, which worked fine with the standard Ultegra derailleur. No such combo was available in 10 speed.

  2. Alan 4 August 2012 at 12:25 am Permalink

    I have fitted an Ultegra 12-30 cassette to my wifes 2 month old Fuji Supreme 2 which came with Shimano 105 shifters & derailiers – (rear derailier as far as I know is a standard 105 short unit) ,Oval 50/34 compact crank & shimano 105 11-28 cassette on Shimano ultegra wheels.
    We have coming up a challenging 500km 5 day ride with some challenging steeps involved so wanted to get a bit better hills gearing for her.
    The Ultegra 12-30 cassette fitted straight on and I only had to adjust the B screw in about 6 turns to give a little extra clearance between the idler pully & the large 30 cog in both HI-Low & Low-Low.
    It shifts perfectly throughout all the gear ranges & she has now clocked up over 150 km with no shifting problems.
    So all round we have achieved a little bit better low ratio & a slight weight advantage & she is of the opinion that the new Ultegra 12-30 is shifting far better than the original 105 12-28 cassette.
    Out of interest I put her wheel on my 2012 Trek Madone 5.9 which has an Ultegra group set & with doing the same adjustments it worked great during a 40km ride shifting as good as the my original wheel/cassette combo.
    Happy riding, Alan. Western Australia

  3. Mike 10 August 2012 at 10:09 pm Permalink

    I have the same set up as Alan (all 105 with standard size RD) except I have a standard size crank (53/39). Would I be able to use the Ultegra 12-30 with my current chain and RD? Thanks.

  4. Mike 11 August 2012 at 8:42 am Permalink

    I have the same setup as Alan, above, (all 105) except that I have a standard (53/39) crank. Will a Ultegra 12-30 work with that set up? Thanks.

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