I want to convert my bike into a singlespeed, but I don't know what gear ratio is good for dirt jumping. Can someone tell me some good gear ratio's?
single speed gear ratio
- Thread starter littleraw
- Start date
i dig 36x16 for dj & street
id go with the smallest front cog you can and the smallest rear cog also. id run an e13 25 tooth with a 12 out back. money on 26's
Does the idea ratio change if you run a 24 or 26? I have a 2.13 on my 26" and like the ratio a lot. And I am now trying to figure out what ratio to go with on my new 24 build. I have been told by a lot of people to go 2.3? Does the difference between the 24 and 26 make up the difference in the ratio?
at the moment im running a 32 t front chainring with a 16 t rear freewheel. I dig it for djs, on street its a little tough.
I run a 34/16 combo on 26" wheels. I dig it for street and dirt. It also climbs most all paved hills I can throw at it.
28/12 is money. it's one of the closest ratios to 36/16. 27/12 is equivilent to 36/16, but you may have a tough time finding a 27t chainwheel. I think animal may make one.
thanks. but what about 25/11?
thats in between a 28/12 and a 36/16. You should be set with that.
Yes, wheelsize does affect the gear ratio. I'm not familiar with 24" gearing, but I'm sure one of the dudes on here can help.
thanks, and your bike looks sick.
Different wheel diameters will affect how far you travel with one revolution of the cranks. The same ratios will also feel very different. To get similar feel and distance you need to look at gear inches. On my 26" SS I like to run 32x17. It fits the type of riding I do and the terrain I like. When I got my 29er I wanted it to feel about the same. 32x19 gets me almost the same gear inches on the bigger wheels.
There's a calculator here for coming up with the numbers. Set the first slider in the first group to your front ring and the rest to 0. Set the first slider in the second group to your rear cog and then the rest to 0. Pick the 26" wheel size and hit submit. It will spit out some numbers. GI is your gear inches and RT is your gear ratio. Now go back and enter 24" wheel and play with the rings and cogs until you get a similar GI number. That will get you close. You may still need to go +/- a tooth on your ring or cog to get it to feel exactly like you want it to.
The quick and dirty way is divide front ring by rear cog and multiply by wheel diameter.
It doesn't give you true gear inches but it does give you a number with which to compare.
I run a 34/16 x 26" wheels which gives you 55..25
32/14 x 24" gives you 54.86 which is pretty close and what I ran when I used 24s.
It doesn't give you true gear inches but it does give you a number with which to compare.
I run a 34/16 x 26" wheels which gives you 55..25
32/14 x 24" gives you 54.86 which is pretty close and what I ran when I used 24s.