Page 1 of 2 12 LastLast
Results 1 to 25 of 26
  1. #1
    RoadBikeReview Member
    Reputation:
    Join Date
    Sep 2007
    Posts
    36

    best cassette for a compact crank 50/34?

    any recommedations? I'm thinking 11/25

    What do most people run?

    Thanks,
    M

  2. #2
    Steaming piles of opinion
    Reputation: danl1's Avatar
    Join Date
    Jul 2005
    Posts
    10,526
    I use a 12/25.

    In a general sense, if you want the compact, you're not likely to have need for the 11 very often. After all, how much pedaling at 35mph is there in your riding? Even if you do like to pedal the downhills, this is right around the point of diminishing returns - where a tighter tuck would help more than the added power of pedaling. End result - there is a fairly narrow band of negative grade where the 11 gives you anything. Shallower, you're in the 12, steeper, you need to tuck up.

    Furthermore, adding the 11 moves a gap into the cassette that can fall into an unfortunate spot. Depending on your style, strength, and terrain, the loss of the 16 can lead to a lot of extra front shifts or steep cross-chaining, and is the cause of a lot of dissatisfaction with the compact setup.
    A good habit is as hard to break as a bad one..

  3. #3
    wim
    wim is online now
    RoadBikeReview Member
    Reputation:
    Join Date
    Feb 2005
    Posts
    10,400
    11-25 works pretty well with a compact for me. Shimano makes an 11-25 as part of the 105 (5600) group. Not something that Trek advertises, but 2008 5.2 Madones with the compact crank option get the 105 (5600) 11-25 cassette, which differs from Ultegra only in surface plating.

  4. #4
    RoadBikeReview Member
    Reputation:
    Join Date
    Sep 2007
    Posts
    36
    great info..thanks..I see that the 105 has it..sounds great..I know that when I'm going downhill around where I live after 35 mph I'm pretty much not pedaling much so I guess its down to whether I want to loss the 16 or not..I've heard that is a very popular cog

    m

  5. #5
    RoadBikeReview Member
    Reputation: serpico7's Avatar
    Join Date
    Jul 2006
    Posts
    378
    Sounds like 16 would be much more useful than 11 for you. But if you get the 11, your bike would look better . . . oh wait, you're getting a compact, so looks are already out the window. So definitely get the 12-25 (or even 12-27 . . . the horror).

  6. #6
    RoadBikeReview Member
    Reputation:
    Join Date
    Feb 2004
    Posts
    1,150
    The point of having a 11-25 is to get more use out of the small ring but the 16 on other combinations is also very useable on the 50 for normal speeds

  7. #7
    Is usually on MTBR.com
    Reputation:
    Join Date
    Jul 2006
    Posts
    132
    11-23.

    My girlfriend can manage a 11-26 fairly well.

  8. #8
    RoadBikeReview Member
    Reputation:
    Join Date
    Feb 2002
    Posts
    19,333

    How about you?

    Quote Originally Posted by marco1910
    any recommedations? I'm thinking 11/25 What do most people run?
    As noted in this and other threads, you have to be pretty darn strong to push an 11. That said, it doesn't really matter what others use, because they might be stronger than you, weaker than you, ride steeper hills than you, or ride no hills at all. You're the one who has to decide what gears work for you. If you're really strong, you wouldn't be asking this question because you would already know what gears you need. Following that logic, you should consider a 12 (or bigger) for the small cog, and choose the large cog based on how steep your local hills are. The answer in southern Florida is quite different than the answer in the Missouri Ozarks or eastern Kentucky.

  9. #9
    RoadBikeReview Member
    Reputation:
    Join Date
    Sep 2007
    Posts
    36
    Thanks all, great advice,,just what I was looking for..the fact is that I'm a 51 year old who probably pushes hard at that age but no where near as strong as the regular young guys..I ride my bike to train, keep in shape and because I just love it..its sounds like 12 would do it on the low end and I'm assuming a 34/25 is something I'd use rarely except for the steeper grades

    I've learned a lot in the forum thanks..

    M

  10. #10
    RoadBikeReview Member
    Reputation:
    Join Date
    Nov 2004
    Posts
    1,469
    12/27 gets my vote and let those proud-big-ego folks with 11/23 take a long hard look at your cassette as you spin 90rpm+ past them on the climbs or into head wind. Very humbling experience. There are gearing calculations which will show you what speed you will be doing in what gear and your desired/favourite cadence. They should help you decide on gearing.

  11. #11
    Is usually on MTBR.com
    Reputation:
    Join Date
    Jul 2006
    Posts
    132
    http://analyticcycling.com/GearSpeedCadence_Page.html

    will tell you a speed at a given cadence. This should help you.

    after reading your other posts, I think a 11-25 or a 12-25 would suit you fine. I still think a 27 is overkill, unless your constantly grinding up steep (above 8% - 10% grade) hills...

  12. #12
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2005
    Posts
    2,169
    I don't consider myself that strong of a rider, and with one ***** of a hill and a 50/36, I rarely use 23.

  13. #13
    Banned forever.....or not
    Reputation: MR_GRUMPY's Avatar
    Join Date
    Aug 2002
    Posts
    22,590
    Since you've already committed your self to non-racing gearing (by getting a compact), why not go with a 13-25 Ultegra cassette. You should still be able to hit 35 mph on the flats with the 13, and the 34/25 should allow you to climb hills with ease.
    This cassette will work unless you have a FH7800 rear hub.
    If your opinion differs from mine, ..........Too bad.
    .
    How would you like it if Hitler killed you
    Dogbert.

    I>U

    Buying parts to hang on your bike is always easier than getting fit.

    If you feel wimpy and weak, get out and train more, ya wee lassie!

    If Jesus had a gun, he'd be alive today!

  14. #14
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2005
    Posts
    2,483
    Quote Originally Posted by MR_GRUMPY
    Since you've already committed your self to non-racing gearing (by getting a compact), why not go with a 13-25 Ultegra cassette. You should still be able to hit 35 mph on the flats with the 13, and the 34/25 should allow you to climb hills with ease.
    This cassette will work unless you have a FH7800 rear hub.
    Generalizations are great, aren't they! Non-racing gearing?

    At home I run a 11-23 since I live in a flat world. Close gear spacing is great.

    When I go for a rides in the Rockies, I run a 11-27.

    One size doesn't fit all.

  15. #15
    Squirrel Hunter
    Reputation:
    Join Date
    Feb 2003
    Posts
    3,893

    Gotta Read the Post

    Quote Originally Posted by MerlinAma
    At home I run a 11-23 since I live in a flat world. Close gear spacing is great.
    Oddly enough, what Grumpy recommended with the 13-25 is closely spaced, including both a 16t and an 18t cog along with a 25t to take advantage of the climbing range which should be the purpose behind a compact crank.

    If you are such a proponent of closely spaced gearing then why aren't you running a 12-23 cassette which is closely spaced instead of stroking your ego by having an 11t and foregoing an 18t cog?

    The 11-25 is about the stupidest combination as it gives up both the 16t cog and the 18t cog which will see far more use then the 11t or the 25t on a compact. If you need a compact with a 25t for the climbs then you do not need the 11t cog. If you can truly turn over an 11t cog then you probably don't need a compact and you will put in enough miles where you understand how important those gears in the middle of the cassette are. There is no excuse for not having a 16t cog on your regular ride with a ten speed setup.

    .
    Last edited by Keeping up with Junior; 10-08-2007 at 09:33 AM.
    Luck is the intersection of preparation and opportunity.

  16. #16
    RoadBikeReview Member
    Reputation:
    Join Date
    Mar 2002
    Posts
    2,529
    If you need a 34x25 on the way up there is plenty of use for an 11t on the way down. Just spent 2 weeks in the Dolomites and the highest and lowest gears were pretty much all I used. I was wishing I had an 11-28 instead of the 11-26 I put on. Next year I may even go with a 12-14-16-18-20-22-24-26-27-28

    Since Basso used a compact and therefore wasn't racing why did they care if he doped?

  17. #17
    RoadBikeReview Member
    Reputation:
    Join Date
    Nov 2004
    Posts
    1,469

    compact is racing on some terrains - Giro and Tour

    Quote Originally Posted by MR_GRUMPY
    Since you've already committed your self to non-racing gearing (by getting a compact), why not go with a 13-25 Ultegra cassette. You should still be able to hit 35 mph on the flats with the 13, and the 34/25 should allow you to climb hills with ease.
    This cassette will work unless you have a FH7800 rear hub.
    Compact has been used at Giro on mountain stages so I would call it a racing group. Probably on Le Tour also. I would say compact is probably the best overall gearing choice for ~80% of the fitness riders, at 90rpm in 50-12 you will be going pretty fast, close to 50kmh. I have 53/39 with 12/27 and I think I will be getting a compact 50/34 with 12/25 or 12/27 next time around.

  18. #18
    Banned forever.....or not
    Reputation: MR_GRUMPY's Avatar
    Join Date
    Aug 2002
    Posts
    22,590
    Most of the riders who do use a compact, do it for extra sponsor money. If they were so valuable in mountain stages, everyone who use one.
    If your opinion differs from mine, ..........Too bad.
    .
    How would you like it if Hitler killed you
    Dogbert.

    I>U

    Buying parts to hang on your bike is always easier than getting fit.

    If you feel wimpy and weak, get out and train more, ya wee lassie!

    If Jesus had a gun, he'd be alive today!

  19. #19
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2005
    Posts
    2,483
    Quote Originally Posted by Keeping up with Junior
    If you are such a proponent of closely spaced gearing then why aren't you running a 12-23 cassette which is closely spaced instead of stroking your ego by having an 11t and foregoing an 18t cog?
    .
    Thanks for suggesting I still have an ego. At 60, most of that has gone away too.

    I live in an extremely windy area and can use the 11t often. I also use the 16 a lot but don't seem to have a problem not having the 18t.

    Who isn't a "proponent of closely spaced gearing" IF you have a choice.

  20. #20
    Impulse Athletic Coaching
    Reputation: iliveonnitro's Avatar
    Join Date
    Feb 2006
    Posts
    5,878
    Even 12-25 has some big holes (for me) at least. I would do 11 or 12-23. You never need the 25 anyways.

  21. #21
    RoadBikeReview Member
    Reputation:
    Join Date
    Sep 2004
    Posts
    1,614
    I run a compact with a 12-27 and this is a great alternative to running a triple. There are some significant hills around here [such as the one between my belt and chest, and a 34-27 helps flatten that thing!

  22. #22
    RoadBikeReview Member
    Reputation:
    Join Date
    Jul 2004
    Posts
    2,312
    I am another 34-27 user. I live at the base of the Blue Ridge Mountains and without the 34-27 gearing, I would need a triple. I do not race and am considering changing the front ring into a 48 from a 50. I NEVER use the 50-12, I'd rather coast down the mountain....and think the 48 would let me stay in the big ring more often while around town.

  23. #23
    RoadBikeReview Member
    Reputation:
    Join Date
    Sep 2005
    Posts
    1,204
    Look at the actual differences between cassettes and compare them to what you will use most. The only difference between the 12-23 and the 12-25 is you swap an 18 cog for a 25 cog. 12-13-14-15-16-17-18-19-21-23 vs 12-13-14-15-16-17-19-21-23-25. OTOH- Moving to the 12-27 creates bigger gaps among lower gears. 12-13-14-15-16-17-19-21-24-27, so not only is 18 cog lost, but there are now 3-tooth differences between largest and next 2 smaller cogs.

    I find the 12-27 useful for big hilly events, like Indiana's Hilly Hundred (multiple >14% grades, inc one >20%). Nothing says you cannot change cassettes to suit your events.

  24. #24
    RoadBikeReview Member
    Reputation:
    Join Date
    Jun 2003
    Posts
    1,876
    What you need depends mostly on where you ride and how steep and long the hills are. I find it hard to believe that anyone short of a pro sprinter needs an 11, even with a 50 big ring. Using it and needing it are two different things. I'd much rather have closer ratios.

    Al

  25. #25
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2007
    Posts
    399
    Quote Originally Posted by mf9point8
    11-23.

    My girlfriend can manage a 11-26 fairly well.
    Nice.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

INTERBIKE

EUROBIKE

Hot Deals

Interbike Featured Booths

Check out the hottest road bike products from these brands!




















See All Interbike Coverage - Click Here »


Latest RoadBike Articles


Latest Videos

RoadbikeReview on Facebook