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  1. #1
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    LBS replaced my 2004 6500 ultegra cassette with CS-HG80 SLX for Mtn bike

    Hoping someone might be able to help me out. Something very strange happened... or at least I think it's strange but I wanted a second opinion. The bike shop replaced my chain and cassette with parts that shimano says are for a mtn bike.... seems very odd to me and I wanted to get a more experienced persons thoughts.

    original cassette: shimano ultrega HG 6500 (2004) - They gave the old one back to me.
    replaced with: Shimano SLX HG80
    My original cassette was 13-23. and the new one is 11-28

    Is this normal?

    The chain they put on this time is HG73 shimano deore which is for a mtn bike but the box says fits for 105...
    The chain that they replaced was HG93 I can't remember if I had the chain replaced in the past but I think I did when I had a complete tune up in 2008.
    The bike is a 2004 Fuji Team that came with an ultegra component group.
    This site says the original chain was an HG73 though: http://www.bikepedia.com/QuickBike/B...Team&Type=bike

    I would appreciate opinions on the matter. Thank you.
    Last edited by safe_bet; 06-02-10 at 06:51 PM. Reason: include gearing info

  2. #2
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    Doesn't sound right at all. But what sizes are the cassettes?
    It's possible that the mountain bike cassette is not compatible with your derailleur.
    There is no difference in road bike and mountain bike chains at the equivalent group level.

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    I guess I'd like to know what you were told up front, what you agreed to, and what you understood to be the case when you left... If you were surprised by what the LBS did, then something isn't right.

    The SLX HG-80 comes in three cog ranges, one of which is an 11-28. That one could run with a standard Ultegra 6500 derailleur with no problem. The other two sizes would (literally) be a stretch... The chain should work fine with your existing components.

    Communication is the key to good customer service. It sounds like that wasn't the case here.

  4. #4
    Senior Member curbtender's Avatar
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    This will all work, the 9 speed mtn stuff is more common so you'd save, price wise. Was that your intention?

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    Thank you all for your quick responses. My original cassette was 13-23. and the new one is 11-28. which I guess should help a little with my top speeds and hills... I was not told the specs would be changing. I was told I needed a new chain and cassette and figured that made sense because the bike is 2004 and I was pretty sure the chain and cassette were the original... although I am second guessing myself on the chain now. I had to take a couple years off because of a back injury but I have been riding roughly 100+ miles a week during the warm months the past couple years with the occasional triathlon thrown in. I def paid the correct prices... I was not really familiar with the SLX until I got home and looked it up.

  6. #6
    Senior Member shouldberiding's Avatar
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    SLX is probably the closest thing to 9 speed Ultegra, which has since been discontinued. I wouldn't worry about it unless the range of the cassette bothers you.

  7. #7
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    Quote Originally Posted by shouldberiding View Post
    SLX is probably the closest thing to 9 speed Ultegra, which has since been discontinued.
    9 speed Ultegra cassettes are readily available: http://www.universalcycles.com/shopp...48&category=41

  8. #8
    Senior Member CACycling's Avatar
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    That is a significant change in gearing to do without telling you first. I would not be happy if an LBS did that to one of my bikes and yet another reason to DIY.

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    They should never change the gearing on the cassette without talking to you about it first. This would be unacceptable to me. YOU (not them) should determine what gear range you want in the rear cassette. What they did is a large change on both ends of your gear range. It will be quite a bit different than what you currently have. IF (BIG IF) you happened to tell them that you wanted both lower and higher gears, then they served you well. If you didn't, decide what you want and make them replace the cassette with one you want.

  10. #10
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    Given that my original cassette was 13-23. and the new one is 11-28 I am struggling. Seems like the 11-28 gives you the best of all worlds (you can go faster on flats and spin your legs more on hills) and there have been a few hills were it would have been nice to shift in an easier gear... I am assuming the 11-28 will be harder to shift up between geers when I am grinding up hills but on the flip side if I shift proactively like a good biker should I can spin my legs more if I need too. I guess in general the 11-28 "seems" to make more sense given I ride in mixed terrain (north east foot hills not mtns) but there obviously has to be a down side... poor shifting and more chain wear... ?? (Front chain ring is 39/53) A big thanks to everyone that has responded!
    Last edited by safe_bet; 06-02-10 at 07:27 PM. Reason: chain ring size

  11. #11
    don't try this at home. rm -rf's Avatar
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    Quote Originally Posted by safe_bet View Post
    Given that my original cassette was 13-23. and the new one is 11-28 I am struggling. Seems like the 11-28 gives you the best of all worlds (you can go faster on flats and spin your legs more on hills) and there have been a few hills were it would have been nice to shift in an easier gear... I am assuming the 11-28 will be harder to shift up between gears when I am grinding up hills but on the flip side if I shift proactively like a good biker should I can spin my legs more if I need too. I guess in general the 11-28 "seems" to make more sense given I ride in mixed terrain (north east foot hills not mtns) but there obviously has to be a down side... poor shifting and more chain wear... ?? (Front chain ring is 39/53) A big thanks to everyone that has responded!
    Your shifting will work just as well (probably better than your old worn out chain did). There won't any more wear, either.

    With a wider range of cogs, you have bigger percentage gaps between gears, but you can go up hills easier. With close range cogs, you can change to a slightly easier or harder cog and keep your same cadence when riding on fairly flat roads. That's the main tradeoff.

    A 9 speed 13-23 is 13-14-15-16-17-18-19-21-23
    with these percentage differences between cogs:

    7.7 %
    7.1 %
    6.7 %
    6.3 %
    5.9 %
    5.6 %
    10.5 %
    9.5 %

    The 11-28 is 11-12-13-14-16-18-21-24-28
    9.1 %
    8.3 %
    7.7 %
    14.3 %
    12.5 %
    16.7 %
    14.3 %
    16.7 %

    I have a Campagnolo 13-26 10 speed set, which is exactly the same as your 13-23 with an added 26 on the end. I like having the 16-17-18-19 gears, since I'm often riding between 17-21 mph and I can get the exact gear I want there. But I would really miss the 26 cog on the steeper hills here. A 23 low gear would be difficult.


    You have 53-39 chainrings, I think. Then the 11 tooth cog is pretty useless, unless you are blasting down steep hills. I can spin my 50-13 high gear up to 32-34 mph, then I coast from there. The usual 12-25 cassette would make more sense for you.
    Last edited by rm -rf; 06-02-10 at 08:01 PM.

  12. #12
    Senior Member shouldberiding's Avatar
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    Quote Originally Posted by joejack951 View Post
    9 speed Ultegra cassettes are readily available: http://www.universalcycles.com/shopp...48&category=41
    I should have said, "...is the closest thing to 9 speed Ultegra they had in stock."

  13. #13
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    It sounds like they sold you what they had in stock although in the end you may be ending up with gearing better suited for the type of riding you'll be doing.
    Also, as you can see new Ultegra cassettes are about $100 and the SLX is a little bit less. If they were smart they would be stocking SRAM 9 speed cassettes for about $40.

  14. #14
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    Thank you all for your help! I was expecting to get a new version of at least the same gearing I had 13-23 if not the exact same cassette. If I had been asked and put more thought into it I probably would have picked 12-25. Given that they gave me 11-28 I am probably going to give it a go on various terrain of a 40+ mile ride this wknd and make my decision based on that. I will provide a final update about my decision for reference after my ride. Thanks again!

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