If you have absolutely no clue, then try riding a geared bike to ballpark it is a good idea, you are still going to have to guess within 2-3 ratio's to take into acocunt the qualities of riding fixed anyway, so still might end up buying a few cogs before getting it just right for you.
If you have some idea already from the gearing you are currently using, then just buy a smaller or bigger cog. If thats not right, buy another.
At the end of the day, its not money wasted, because you can keep them and then gear your bike to suit where you are going to ride in the future. (Or bang one on the other side of the hub and flip the wheel as an when you feel like it)
I just stuck with the off the peg ratio on my Fuji.
I agree with both of you, hah.
If you have absolutely no clue, then try riding a geared bike to ballpark it is a good idea, you are still going to have to guess within 2-3 ratio's to take into acocunt the qualities of riding fixed anyway, so still might end up buying a few cogs before getting it just right for you.
If you have some idea already from the gearing you are currently using, then just buy a smaller or bigger cog. If thats not right, buy another.
At the end of the day, its not money wasted, because you can keep them and then gear your bike to suit where you are going to ride in the future. (Or bang one on the other side of the hub and flip the wheel as an when you feel like it)
I just stuck with the off the peg ratio on my Fuji.