Originally Posted by
jdogg111
thanks for all the great replies, great info, I should have mentioned that I'm not at all concerned with the small cogs, the only time I've used the smallest is taking the tire off. The 10 speed cassette has much better increments, by the tools you good lad s have supplied 36 seems to be what I'll need, so I'll have 60ish top I'm guessing. What that maxes out speed wise I have no clue but it's safe to say I only see 15mph when going downhill anyway. 10 mph on the 20 inch wheels is a good pace for this old geezer. Thanks
I don't know how gear inches become gear inches but I know the number I like for a low gear is between 23 to 26 inches. My Dahon with 7-speed IGH and 34t front ring has a low of 25.1, high 61.3. Based on your information with 11-25 cassette and 36t ring I came up with a low of 26.9, high 61.1.
I'm a geezer like you who just wants to get this thing up hills, I don't care about flats/downhill speed, I have a different bike for that. 26.9 would be a bit high for me, if you drop down to a 34t front ring you'll have 25.4-57.7. Yeah you'll spin out quick with that top gear.
Here's mine and the two configurations I estimated for your bike.
