10/14/14 4:51 PM

Thinking about trying a 13-25 for flat landing.

6600 first gen 10 speed cassette cogs

Cassette Sprockets Combinations
11,12,13,14,15,16,17,19,21,23
12,13,14,15,16,17,18,19,21,23
12,13,14,15,16,17,19,21,23,25
12,13,14,15,16,17,19,21,24,27
Junior Gearing
13,14,15,16,17,18,19,21,23,25
14,15,16,17,18,19,20,21,23,25
15,16,17,18,19,20,21,22,23,25
16,17,18,19,20,21,22,23,25,27


Need to check and see if the 13 as the smallest might get too close to the frame. Including the chain when engaged.

Last edited by Sparky on 10/16/14 1:12 PM; edited 1 time in total

10/14/14 7:20 PM

I've ridden Campy 13-26 10s cassettes for a decade and love the 13-19 straight block. Same as the Shimano 13-25 but with a 26 instead of the 25. No issues with frame clearance.

10/15/14 1:21 AM

I've been using Campagnolo 13-29 10-speed cassettes since they first appeared. I haven't found any frame that I can't use them on. And I also have a couple of Shimano 13-30, made by discarding the two smallest cogs from a 12-27 and substituting a 13t outer as the small cog and a 30 as the large, using the spare spacer from the outside of the cassette between the 27 and the 30.

10/15/14 3:32 AM

For a year or so I used a Century Special I made by modifying a 9s SRAM 12-26 to a 13-30 (the usual methods). However, I recently went from my standard road crank (53/39) to a "subcompact" 46/30. This made me reconsider my gearing (for both mechanical and preference reason) and I've gone back to the 12-26 unmodified.

Qualification: I am S L O W.

In any event, I like the combination, though I find I spend considerably more time in a 12ish end of the cassette than the 26ish. But it's nice to have 30/26 for climbing.

10/15/14 4:09 AM

gearing that low I would be buried to the right the entire time and wish for more.

I used a 13-23 8 speed for years as my racing gears, paired with a 53/38. Not normal gearing at all but it worked for me.

10/15/14 5:46 AM

I've been using it with a 50/34 compact on the road for several years. I do have one 13-29, but I haven't used it yet. Combined with a compact, it pushes the chain wrapping limit of a standard cage Campy derailleur.

10/15/14 6:27 AM

Yep. I ended up putting a long-cage derailer on my bike after installing the subcompact crank, particularly with the 16-tooth jump.

10/15/14 10:26 AM

I've used Campy's 13x29 10-speed for years with a modified Campy triple (53/42/26) and their long cage rd. Works great.

As to modifying a Shimano 12x27, yes you can do it with 9-speed cassettes. I created a couple of 13x27 9-speeds by substituting a 13T first position for the original 12 and 13 and adding a 16T cog and spacer. The problem these days is finding individual 16T cogs. The have effectively vanished.

I don't know if you can add a larger cog to a 12x27 10-speed cassette given that the original largest cog has a recess in the side facing the hub.

Last edited by Dave B on 10/16/14 7:06 PM; edited 1 time in total

10/15/14 10:34 AM

I use Campy 13-26 9-speed (same as the 10-speed Kerry mentioned, but missing the 18). I like the spacing. I use it for hilly rides (with 39-62 crankset), and it works fine for me. I certainly don't feel like I need a 12 or 11 for the descents - might be different if my big ring was only 50, but I doubt it.

10/15/14 3:43 PM

quote:

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....with 39-62 crankset...

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10/16/14 12:18 PM

Don't let the name Junior scare you off.

I run a Campy Junior 14-23 all winter with my 52-42 cranks. It is the rare tailwind that leaves me spinning fast to keep with the pack of other riders. I occasionally miss the 13t cog but rarely find myself looking for a 12t or 11t cog. My wife runs a 13-26 all year round unless we head to the steep climbs for a weekend and she gets the 13-29.

Having that straight block of gears in the middle is wonderful for 90% of most peoples riding... 15-16-17-18-19. I really miss the 18t if I have a wide range cassette on and simply despise any cassette that does not have a 16t cog.

I have not run the numbers lately but back when my son was racing a junior cassette started with a 14t cog. This may have changed with all of the compact cranks. Just be sure to do a test rollout if racing as a junior.

10/16/14 1:54 PM

Yes, Dave, that's a typo.

52

Thanks

:-)

10/16/14 7:10 PM

quote:

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I really miss the 18t if I have a wide range cassette on and simply despise any cassette that does not have a 16t cog.

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10/16/14 7:16 PM

"but the gap between 15 and 17 is HUGE is the 16 is missing."

Not as bad with a 34 front, but I agree for pace line riding I hate not having the 16. Not usually in the 34/16 in a pace line situation though. ;)

10/16/14 7:19 PM

quote:

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The gap between 17 and 19 isn't intolerable without the 18 but the gap between 15 and 17 is HUGE is the 16 is missing.

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