General Discussion Triathlon Talk » Help with Cassette's Rss Feed  
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2010-07-09 3:49 PM

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Subject: Help with Cassette's

Looking to pick up a better cassette for climbing, I am currently running compact crankset 50/34 with an 11/24 cassette. Need a little extra for some killer hills. Any suggestions?    



2010-07-09 3:57 PM
in reply to: #2971582

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Subject: RE: Help with Cassette's
How many speeds?  Shimano has 9 speeds up to at least 34/11.  That should get you up most hills.
2010-07-09 3:59 PM
in reply to: #2971582

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Subject: RE: Help with Cassette's
Often cheaper to replace the inner chainring than the whole cassette.  OR you could simply swap out your granny gear something with more teeth. 
2010-07-09 4:08 PM
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Subject: RE: Help with Cassette's
You rear derailleur capacity may be a limiting factor. The Ultegra short cage has a total capacity of 29T, I believe.

50-34 = 16
24-11 = 13

16+13 = 29... You're already at capacity if you're running a short cage Ultegra (DA is the same, I think). So if you want a wider range, you could go with a smaller chainring, or a wider range cassette, but you may also need to go to a long-cage derailleur.
2010-07-09 4:10 PM
in reply to: #2971590

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Subject: RE: Help with Cassette's
FuryUs - 2010-07-09 4:57 PM How many speeds?  Shimano has 9 speeds up to at least 34/11.  That should get you up most hills.


an 11-34 won't work without a long cage derailleur.
2010-07-09 4:20 PM
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Subject: RE: Help with Cassette's
Im running an 10 Speed Ultegra SL setup on my Felt AR4 


2010-07-09 4:22 PM
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Subject: RE: Help with Cassette's
I have no idea if I have short or long dérailleur.  I had 11-23 cassette on mine, then I swapped it with 12-28. WHOA baby! Much better on the hills. I'm able to spin better, but if you hit a certain hill percentage, you still have to do work, but it's not as bad as doing them on 23. 

I even want to swap my double to a triple, but decided against it...and decided to just work it on the hills better, but a 28 teeth did help a bit. :-)



2010-07-09 4:25 PM
in reply to: #2971592

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Subject: RE: Help with Cassette's
jeffnboise - 2010-07-09 4:59 PM Often cheaper to replace the inner chainring than the whole cassette.  OR you could simply swap out your granny gear something with more teeth. 


Don't mean to hijack, but if you run a 53/39, can you put a smaller ring than the 39 and be done?  Is it that simple?
2010-07-09 5:17 PM
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Subject: RE: Help with Cassette's
10 speed you can get 11-28 cassette if you have a newer shimano or sram derailuer. If you have an older 10 sp Shimano they were speced for 27 was biggest gear but my two Ultegra derailuer worked okay but was a bit of a challenge to get it adjusted right.

I have a 11-34 cassette I put on my tri bike with a mountain bike derailuer if I want to keep my power even and low relative to my FTP.

11-28 will give 4 more gears than you currently have.

Probikekit.com has Ultegra 10 speed cassettes under $60 with PBK15 discount code-ie 15% off.
2010-07-09 5:30 PM
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Subject: RE: Help with Cassette's
GoFaster - 2010-07-09 5:25 PM

jeffnboise - 2010-07-09 4:59 PM Often cheaper to replace the inner chainring than the whole cassette.  OR you could simply swap out your granny gear something with more teeth. 


Don't mean to hijack, but if you run a 53/39, can you put a smaller ring than the 39 and be done?  Is it that simple?


Not really. The bolt diameter dictates that a 39 is the smallest ring available. The circle can only be so small, hence the compact has bolts closer in toward the center. White industries makes a 38, but it's not recommended and isn't ramped so shifts a bit clunky.

Same logic for a 34t and a compact: That's the smallest circle which allows for the bolts, hence, the smallest inner ring available.

Edited by pitt83 2010-07-09 5:31 PM
2010-07-09 5:41 PM
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Subject: RE: Help with Cassette's
KathyG - 2010-07-09 3:17 PM
I have a 11-34 cassette I put on my tri bike with a mountain bike derailuer if I want to keep my power even and low relative to my FTP.

11-28 will give 4 more gears than you currently have.

Probikekit.com has Ultegra 10 speed cassettes under $60 with PBK15 discount code-ie 15% off.



Kathy

Just curious.. What mtn bike der.  are you using? I have an older tri frame that I would like to build up cheaply, and (less expensive, used)  mtn bike parts seem to be more plentiful...

thanks

kelly


2010-07-09 5:49 PM
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Subject: RE: Help with Cassette's
triosaurus - 2010-07-09 6:41 PM
KathyG - 2010-07-09 3:17 PM
I have a 11-34 cassette I put on my tri bike with a mountain bike derailuer if I want to keep my power even and low relative to my FTP.

11-28 will give 4 more gears than you currently have.

Probikekit.com has Ultegra 10 speed cassettes under $60 with PBK15 discount code-ie 15% off.



Kathy

Just curious.. What mtn bike der.  are you using? I have an older tri frame that I would like to build up cheaply, and (less expensive, used)  mtn bike parts seem to be more plentiful...

thanks

kelly


Shimano mid level (second from the top) MTB that is 9 speed....shifting isn't perfect but bar end shifters control the derailuer.

You can always switch shifting to friction if you have issues as well.
2010-07-10 12:31 PM
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Subject: RE: Help with Cassette's
If you go to a 12-28 you are going to need to be careful if your chain is long enough.
2010-07-10 12:39 PM
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Subject: RE: Help with Cassette's
FuryUs - 2010-07-09 2:57 PM How many speeds?  Shimano has 9 speeds up to at least 34/11.  That should get you up most hills.


Not on most road bike deraileurs.   With shimano road components, the biggest you can go is 12-27, which I would recommend.  You'll need a longer chain, too, so pick up a new one of those along with it.
2010-07-11 6:21 AM
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Subject: RE: Help with Cassette's
Another problem with having a very wide spaced cassette is that it will be difficult to stay in an optimal gear at any given time... the space from one to the next is simply too much. That's why a compact often makes lots of sense... you can use an 11-21 (straight block) or maybe a 12-25 (when hilly; with space between some gears, but no major jumps) instead of standard crank with a larger spaced cassette....
2010-07-11 6:32 AM
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