Tiagra 4700 50/34 with 11-46 Sunrace 10 speed cassette

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  • #30305
    PaulMWilliamson

    I have just updated by Tiagra 4700 rear cassette from the 11-34 to 11-46 Sunrace cassette and share my experience (I have 50/34 at the front):

    1. First I removed the old chain with a 10 speed link remover : no problem.

    2. Next I tried with much attempt to remove the existing cassette with a universal Shimano cassette lock ring remover, but with no success.

    So I headed down the local bike shop, where they removed it quickly and put on the new Sunrace cassette. There I decided to buy a dedicated cassette lock ring remover and wrench all in one.

    3. Then I removed the rear derailleur and screwed on the derailleur extended, pushing it as far back as possible

    4. Then I screwed back on the rear derailleur and screwed in the B-screw.

    5. Finally I added the 10 speed chain, by going big-big – it was too short! Thankfully I had bought two chains with quick links. I began with about 6 extra links and after 2.5 hours I worked it only only needed about 2 extra links, using 2 quicklinks as well. So I can cycle in big-big safely, but the cage is not long enough for small front and the 2 smallest sprockets at the back. I do not know of any 10 speed rear long cage derailleur which may work. 

    6. Re-indexing was quite easy and simple to do.

    7. I trialled it yesterday for a 50 mile ride and overall I am very pleased. Up the steepest hills I can spin far more easily. There is noticeably a change in cadence when I change gear. There can be a slight unsettling feeling on the odd occasion when I back pedal, so I will seek to abstain from that. I ensured I did not use small-small gears. I tend to keep to the middle of the cassette on the flat. 

    8.  On another note, I bought a 0.5% chain wear checker to replace my 0.75% checker, and I am glad I did. I was beginning to have chainsuck on the old chain : it passed the 0.75% check, but not the 0.5% check. 

    Overall it took me about 7 hours to do.

    Any comments from others?

Viewing 2 replies - 16 through 17 (of 17 total)
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  • #953161
    0
    BBB

    You have two problems:
    You have two problems:
    1. The system is well outside the capacity of the rear mech and shouldn’t be used as it is. Slack chain in some gears is asking for trouble…
    2. NO OTHER REAR MECH, new or old, will work with your shifters and 10sp cassette, as the 4700 groupset is an oddball (shifter pull is an 11sp equivalent). An 11sp rear mech would only work with a 11sp cassette with only 10 cogs available. The geometry of the older road and MTB mechs is different also.
    Personally I’d use smaller cassette and combine it w smaller large chainring, E.g. 11-40 and 44T in order to achieve a safe compromise.

    #953159
    0
    kil0ran

    In the quest for ever more

    In the quest for ever more spinny gears I went the opposite way and fitted a 46/30 crankset (FSA Tempo Adventure). All in cost £110, including the square taper BB and took about an hour to fit. No need to resize chain, in fact I didn’t even have to drop the front mech. 

    What mech extender did you use? Personally I wouldn’t risk running a setup where all cassette/chainring combinations aren’t usuable. Easy to make shifting mistakes when you’re tired and end up destroying the mech.

Viewing 2 replies - 16 through 17 (of 17 total)
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