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  1. #1
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    40t upgrade. Yay or nay on 16t as well?

    Considering the 40t upgrade but I'm wondering what the collective things about replacing the 15 and 17 with a 16t or just removing the 17. OneUp is now selling both their 40 and 42 with a 16t. Then there's this guy on eBay selling just the 16 but he recommends rotating it 180 degrees and doing some filing to get the ramps to line up. Is a 16 even necessary or is the 15 to 19 jump okay? Lots of people on the interwebz proselytizing with gear ratios and percentages.

  2. #2
    Join Date
    Jan 2009
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    I have a 11-42, and i just removed the 17
    Shifts a bit slower around the missing gear, going up in diameter.

    Nothing to worry about though.
    Sent from my SCH-I500 using TGR Forums

  3. #3
    Join Date
    Oct 2005
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    Where the riding is good
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    714
    Some find the 15 to 19 jump to be a downer: http://www.vitalmtb.com/product/guid...Sprocket,13713

    Others won't mind it. Depends on your terrain, riding style, and level of OCDness.

  4. #4
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    Legs not strong enough for your new 32t up front, huh?



  5. #5
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    Sep 2006
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    North Van
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    I notice the 15-19 gap on the road but not on the trails. Still, I'd add a 16 given the choice but I'm anal like that.

  6. #6
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    Annnnnd this is why I want a 14-40 or 42 10 speed cassette. I really have no need for the smallest cogs but want smooth, no hassle shifts with reasonable gaps.

  7. #7
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    Jan 2012
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    Quote Originally Posted by smmokan View Post
    Legs not strong enough for your new 32t up front, huh?


    ha. something like that. went over to green mtn the other day and the climb up from the 470 lot was stupid steep. getting passed by super lycra man wasn't cool either...

    going to throw the 30 on the front and head over to falcon later this week.

  8. #8
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    Oct 2009
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    536
    Great timing for me on this thread, thanks for the heads up on the free 16t-

  9. #9
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    Apr 2008
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    Quote Originally Posted by gravitylover View Post
    Annnnnd this is why I want a 14-40 or 42 10 speed cassette. I really have no need for the smallest cogs but want smooth, no hassle shifts with reasonable gaps.
    X2

    543895
    However many are in a shit ton.

  10. #10
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    Quote Originally Posted by gravitylover View Post
    Annnnnd this is why I want a 14-40 or 42 10 speed cassette. I really have no need for the smallest cogs but want smooth, no hassle shifts with reasonable gaps.
    Why not just run an 11-36 cassette with a smaller chainring? You get basically the same gear range, the same gaps between cogs, and it already exists.

  11. #11
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    Feb 2012
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    Gear inch charts are complicated!

    To elaborate, a 28t ring with an 11-36 cassette is very close to the same as 30t with 12-40, and 32t with 13-42. So if you're not worried about pedaling at over 20mph just use a smaller ring.

    I'm probably going to a 32t single ring and 11-42 10-speed and am a little concerned about losing out top end. But this is a 29" xc bike.
    Last edited by jamal; 04-21-2014 at 11:36 PM.

  12. #12
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    Quote Originally Posted by toast2266 View Post
    Why not just run an 11-36 cassette with a smaller chainring? You get basically the same gear range, the same gaps between cogs, and it already exists.
    I think this is a valid point.
    1. You can go to a 30t chainring fairly easily on the 104BCD. And that gains you about one extra "gear" on the way up.
    2. If you spend a bit more cash and go with a spiderless crank and Bling Ring combo you can go to a 28t chainring and gain a little more
    3. If you hunt around maybe you can find a 26t ring.
    4. If you want something really close to what you have on the low end with a 2x drivetrain I think you'll need a 28t chainring and at 42t cassette.
    However many are in a shit ton.

  13. #13
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    Sep 2006
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    Wolf Tooth makes a 26t direct mount ring.

  14. #14
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    Quote Originally Posted by jm2e View Post
    I think this is a valid point.
    1. You can go to a 30t chainring fairly easily on the 104BCD. And that gains you about one extra "gear" on the way up.
    2. If you spend a bit more cash and go with a spiderless crank and Bling Ring combo you can go to a 28t chainring and gain a little more
    3. If you hunt around maybe you can find a 26t ring.
    4. If you want something really close to what you have on the low end with a 2x drivetrain I think you'll need a 28t chainring and at 42t cassette.
    Agreed. From looking at a gear inch chart, a 28t ring with an 11-36 would be very similar to a 32t ring with a 14-42. You'd get a little more top end with the 11-36.

    But the reason no one actually wants that setup is that you'll spin out waaay too easy. I spin out a 32 x 11 on any dirt road that isn't uphill. It's not a huge deal, but going down to a 30 or 28t ring would get really annoying. The whole point of the 10-42 is to give a wide range so you can go up steep stuff and down fast stuff.

  15. #15
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    I played with using different gears today and what I came up with is I hate shifting the front from small > big (duh, who actually likes it?) and that just confirmed why 1x is the rage. I'm currently running 24-36 front and 11-36 rear and I find that I use the lowest gear pretty often (on both rings) but never seem to get past the 16 tooth cog in the rear in any situation I encountered and I was riding my regular spot so I know when and where I can turn it up and how fast I can go. I never ride this particular bike on the road so a higher gear will probably never be necessary.

    I like the idea of going to either a 28 up front with a 40 or 42 in the rear for most places but there will probably be some places where a 30 or even 32 is right. So it seems that a 28 with a 13 or 14-42 will cover most bases for me but I should keep the larger chainring and a longer chain in the kit that travels with me.

    Now I just need the parts to exist...

  16. #16
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    Mar 2006
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    Missoula, MT
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    Just went 22t/36t 2x10 on my heavy steel 29er beast with 11-36t rear. It's fuckin boss. Idk how the fuck people are riding 1x's. Specially if they ride to the trailhead.
    Does kinda approach the limit of the system though. Still works, even with a.mid cage derailleur. Probably because it's a hardtail
    No longer stuck.

    Quote Originally Posted by stuckathuntermtn View Post
    Just an uneducated guess.

  17. #17
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    Feb 2012
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    28x14 on 26" wheels is 53 gear inches. That is equivalent to your current 36x18, i.e. losing the 4 smallest cogs on your cassette. You never use those? It's only 17mph at 100rpm pedaling cadence.

    I have 29" wheels, 26/39 rings, and I find myself on the smaller cogs in the big ring pretty often (and in 26x36 a lot). Since I adjusted it right, the front derailleur shifts easily and reliably and I don't drop chains. So I don't really have a good reason to lose a front ring other than being more of a weight weenie.

  18. #18
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    Apr 2004
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    Like I said, the bike never sees pavement so really, how fast do I need to be able to go? This is for my fatbike by the way with an outer tire diameter of ~32" so it is a slightly taller gear than it would be on my other bikes. I have a 1x8 that I put together a few years ago and I run a 26 front with a 12-25 rear. It's been mostly sufficient but I do occasionally run out of gear. It's ok though, us old guys like to coast

  19. #19
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    Yeah, not as terrible. Wheel size is kind of important when you are figuring out gearing.

    I guess we are just saying a standard 11-36 or 12-36 10 speed cassette with the appropriate sized front ring gives you more range and ratios that are plenty close together without trying to piece together a cassette that doesn't exist.

  20. #20
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    I don't want to piece anything together, I want Shimano or SRAM to make a 14-40 or 42 cassette.

  21. #21
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    Nov 2005
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    Down In A Hole, Up in the Sky
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    I'm waiting for 12-42!

    Currently running 12-38, with 24/34
    Forum Cross Pollinator, gratuitously strident

  22. #22
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    Oct 2008
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    Golden, CO
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    ^^^ 12-38? ... who makes that?

    I'm just getting ready to go 10-sp, but I'm keeping the 2x up front. Currently 9sp @ 22/34 & 11-34. I climb a bunch, and I'm weak, and I want the 38/11 for goin' fast (and getting to/from the trails) I wish there was a 11-40t cassette readily available, and with the aftermarket full of 40t and 42t kits I can't believe the big 2 haven't adjusted accordingly.

  23. #23
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    Quote Originally Posted by toast2266 View Post
    I spin out a 32 x 11 on any dirt road that isn't uphill. It's not a huge deal, but going down to a 30 or 28t ring would get really annoying. The whole point of the 10-42 is to give a wide range so you can go up steep stuff and down fast stuff.
    Funny thing is, I don't go that fast. If it's gravel road flat or downhill, I coast at around 18-22 mph. It's probably a sign that I have yet to mature as a cyclist, but I don't really care much.
    On the flip side, I'm 32x11-36 now and would love an extra gear so I'm gonna go 28t Bling. I'll coast happily when I get close to a spinout.
    Beyond that, my wife hates her FD but insists on not losing her granny when I switch her to 1x, so she's getting the 28t Bling and a 42t cog too. She's afraid of going fast on gravel b/c of a bad crash 15 years ago so she'll never worry about spinning out.
    So yea, I think one of the big boys should do an 11-40 or 11-42 10sp cassette. Because I'm kinda sure it'll shift better than the ghetto rigged units.

    And maybe one of them will take notice of how popular x9 cranks are all of a sudden and realize the 104BCD is dead thanks to its 32t limit.
    However many are in a shit ton.

  24. #24
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    Quote Originally Posted by gravitylover View Post
    I don't want to piece anything together, I want Shimano or SRAM to make a 14-40 or 42 cassette.
    But why would they? A 32t ring with a 14-42 is almost exactly the same gearing as a 28t ring with an 11-36 cassette. Except it weighs more and shifts worse and has less range.

  25. #25
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    Quote Originally Posted by jamal View Post
    Except it weighs more and shifts worse and has less range.
    Ok, you've convinced me. Now I want it. Can it be red? I hear red's fast.

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