Opinion On 28T to 30T
#1
Senior Member
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Opinion On 28T to 30T
Just recently I am about to be in the need to replace my front ring.
I am running 28T on it at the moment and I do feel i need that ratio. As often in my lowest gear when riding up a big climb in snow. I need to spin.
However seems to be a shortage of 28T's around just 30T.
Would i see much difference if i got 30T for my Fat bike?
I am running 28T on it at the moment and I do feel i need that ratio. As often in my lowest gear when riding up a big climb in snow. I need to spin.
However seems to be a shortage of 28T's around just 30T.
Would i see much difference if i got 30T for my Fat bike?
#2
Senior Member
in the lowest gear it will be proportionally harder. If it matters, only you can know after trying. Over the years I went the opposite to lower and lower gears on my fatbike. Especially in the low-speed and high resistance situations like deep snow.
#4
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Just recently I am about to be in the need to replace my front ring.
I am running 28T on it at the moment and I do feel i need that ratio. As often in my lowest gear when riding up a big climb in snow. I need to spin.
However seems to be a shortage of 28T's around just 30T.
Would i see much difference if i got 30T for my Fat bike?
I am running 28T on it at the moment and I do feel i need that ratio. As often in my lowest gear when riding up a big climb in snow. I need to spin.
However seems to be a shortage of 28T's around just 30T.
Would i see much difference if i got 30T for my Fat bike?
If these changes look consistent, it's because they are. It's about a 7% increase in gear ratio.
I recommend figuring gear inches because, depending on your cassette, you MAY be able to approximate what the change will be with different gears. For example, if your second tallest sprocket is a 42t, then the combination of your existing 28t chain ring and 2nd gear 42t sprocket is 19.9". That's almost the same as your low gear with a new 30t chain ring and 1st gear 46t sprocket (19.5"). So could you live with your second tallest sprocket as your bike is now as your lowest gear?
Obviously, all of that changes depending on the configuration of your bike (tire size, cassette, etc.). But trying to imagine a 7% change can be difficult, so doing the math may enable you to find a combination on your current drivetrain that will be equivalent to your new setup and would allow you to "try before you ride".
#5
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Going to a 30T chainring from a 28 would make it 7% harder to climb. The longer the hill, The greater overall effort required. The short hills where I live I can climb with tall gears. If I had to climb a moderately steep hill 1/4 mile long I would need a much lower gear.
On the plus side though it will pay off under light loads. Sometimes it ballances out. A little more effort to climb is rewarded with more efficient riding at other times.
On the plus side though it will pay off under light loads. Sometimes it ballances out. A little more effort to climb is rewarded with more efficient riding at other times.
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To the OP:
I just took a look at Chain reaction Cycles web site. They list 40 different in stock 28 tooth chain rings for SRAM, Race Face , Hope, Shimano, and a lot more crank sets. I just received a Hope crankset with Bottom Bracket in less than a week. Your LBS doesn't have wholesalers with the inventory of the online giants like CRC.
I just took a look at Chain reaction Cycles web site. They list 40 different in stock 28 tooth chain rings for SRAM, Race Face , Hope, Shimano, and a lot more crank sets. I just received a Hope crankset with Bottom Bracket in less than a week. Your LBS doesn't have wholesalers with the inventory of the online giants like CRC.
#7
Junior Member
Going to a 30T chainring from a 28 would make it 7% harder to climb. The longer the hill, The greater overall effort required. The short hills where I live I can climb with tall gears. If I had to climb a moderately steep hill 1/4 mile long I would need a much lower gear.
On the plus side though it will pay off under light loads. Sometimes it ballances out. A little more effort to climb is rewarded with more efficient riding at other times.
On the plus side though it will pay off under light loads. Sometimes it ballances out. A little more effort to climb is rewarded with more efficient riding at other times.
#8
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Actually 30/42 is pretty low. I would try that first if you can't find a 28.
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I don't know much about the mechanics involved with what you are suggesting. But I believe the rear derailleur has a max limit as to the size of the largest sprocket as well as the max difference in teeth You could google your unit for starters.
Actually 30/42 is pretty low. I would try that first if you can't find a 28.
Actually 30/42 is pretty low. I would try that first if you can't find a 28.
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If your rear derailleur can handle that range, then a 30t combined with an 11-50 will increase your high gear ratio and will also decrease your low gear ratio compared with a 28t with an 11-42. You'll have more gear range and your low will be lower and your high will be higher.
#11
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If your rear derailleur can handle that range, then a 30t combined with an 11-50 will increase your high gear ratio and will also decrease your low gear ratio compared with a 28t with an 11-42. You'll have more gear range and your low will be lower and your high will be higher.