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  1. #1
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    28T chain ring on 4.5

    Anybody run a 28T up front on 4.5? Good idea/bad idea? I've never ridden a 1X and am a bit intimidated (I'm not young or light) about losing the low end of a 3X for big CO climbs.

    I realize my wanted info is likely in the 4.5 thread, but going through 750 posts is more than my patience allows.

    thanks in advance

  2. #2
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    Stick with at least a 30T.

  3. #3
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    I'd suggest no lower than a 30t as you'll lose to much power when you wanna hammer the flats and downs. There are some great choices for getting that better range for your cassette..... E-13, One-up, Eagle and so on. With Eagle you could run a 34t and be fine.
    18' Orbea Rallon
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  4. #4
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    If it works for the trails that you ride or your fitness, go for it. It will suck more if you're pushing too big of a gear than if you loose a little on the top end.

  5. #5
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    Yeah, plenty of folks in CO running a 28t on long days. Even at Breck Epic some of the top finishers were running it on certain days.

  6. #6
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    Yep, running a 28 in So Cal. With lots of fire roads and a little of everything in between. My weak knees certainly need it and I'm never concerned about topping out.

  7. #7
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    I have a 28 tooth on my 4.5. The yeti website specifically says that is the minimum chainring size. Clearance is pretty close between the chain and chain stay, but it works fine.

  8. #8
    Salt Lake City, UT
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    Its easy enough to try both - maybe start with the more-common 30t option and if it is too much, run a 28.

    I think you will surprise yourself in how well you'll do with 1x. its not as drastic as you'd think.

    Quote Originally Posted by Blueallah View Post
    Anybody run a 28T up front on 4.5? Good idea/bad idea? I've never ridden a 1X and am a bit intimidated (I'm not young or light) about losing the low end of a 3X for big CO climbs.

    I realize my wanted info is likely in the 4.5 thread, but going through 750 posts is more than my patience allows.

    thanks in advance

  9. #9
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    I run the 28 in all my bikes in Montana. There is a lot of climbing here. I just went to a 30 tooth eagle 1x12 and the easiest gear seems way too light. I might go to a 32 on the eagle but I like being able to ride in the middle of the chainring. It is always nice knowing you have that extra gear on longer climbs. No problems with the 28 but my 4.5 did make clunking noises throughout rough, fast terrain. I'm not sure if it was the 28/X01 combo or something else. Today's ride didn't have any noise with the eagle but it wasn't really a fast bomber ride either.

  10. #10
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    I've been running a 30T wolf tooth elliptical. Not sure if it really makes a difference, but in my head it does.
    you can get passed a dog... nobody fuks with a lion

  11. #11
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    I;ve ran 28t on 45c with xo1 11spd while i was riding the EPIC trail in mt Buller .... works great ,, i just wanted to survive the 2.5 hr climb to enjoi the last 10km decent...

  12. #12
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    I'm running a 30t but also have a XT 11-46 cassette. Sometimes wish I had a 34t up front for torque on straitaways.

  13. #13
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    1x11 28t is my preferred setup for here. 1x12 30t
    Front Range, Colorado

  14. #14
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    Go for the 28T and upgrade when you get stronger. I'm not sure if SRAM makes an eagle 28T chainring yet...at least when I was ordering mine, 30T was the smallest. If you went with the 11speed, 28T is very easy to find.

  15. #15
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    I'm running the 30t up front with 11-46 n works for me. Also my cardio isn't the best either. Eventually when cardio gets better will swap to a 32t.

  16. #16
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    Quote Originally Posted by Streetdoctor View Post
    1x11 28t is my preferred setup for here. 1x12 30t
    This.

    Don't let any of the "elitist" tell you otherwise. I found it was helpful to run the numbers through a gear calculator. I almost went with a build that had a 1x11 setup and I was going to have the LBS install a 28t ring up front to match the low-end of a 2x10 setup I was running on my old 26er. Ended up getting the Eagle build which came with a 30t. I think it's perfect for someone like me who can use all the help I can get on the uphills. Still has plenty of low range too.

    Also, keep in mind that 29er's require more torque so a 28t is not crazy talk by any means.

  17. #17
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    My first 1x was praxis 10-40 with a 30t chainring. I'm not a strong climber, and did just fine. My new bike (sb4.5) has 32t and 46t in the back. Did not miss a beat. I'm in the heart of the Rockies so there is no shortage of big climbs and do not find myself considering a smaller chainring. To each their own.

  18. #18
    ejh
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    I changed out the 30 for a 28 on my ASRc, I like the extra climbing gear and don't miss much at the top end, I spin out at 28mph and if I do that gravity takes over anyway.

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