I have a four wheel surrey bike (see post here: https://www.reddit.com/r/ebikes/s/yCMueiuIdu) that I'm looking to convert from single speed to geared. It's definitely not a standard bicycle and I'm not experienced enough to know what I'm looking at to research alternative configurations. The attached picture is of the back wheel: I'm hoping to remove the existing sprocket and cram in something with 3-5 gears so I have more options.
My questions are:
1) what tool would I use to remove this sprocket? I got a park tool FR3 freewheel remover based on the number of notches, but the scale is completely wrong.
2) any recommendations on what kind of cassette or freewheel might fit? They're 130mm dropouts, but they're fully horizontal rather than angled. Cold setting is theoretically possible since it's a steel frame but I'd be eyeballing it since it's not a normal frame and the risk is too high for me.
I did research doing the front instead but the options I found are expensive and would be even more difficult to install. I do think I can get a rear derailleur on though.
Anyway would appreciate any thoughts from people who know bikes better than me.
by Asmodoues
3 Comments
Idk if you’re going to have space for a multi geared freewheel on there, it doesn’t look like you will.
I think the FR-6 will do that one but it’s hard to tell, can you measure the diameter of the circle relative to the slots for the tool?
That’s already a pretty snug fit, I can’t imagine finding space for a cassette without a different wheel.
Is there an idler sprocket in front of the hub? Typically on a setup like this, the idler is where you would install gears.
Either an IGH or cassette, depending on what it’s designed for.
Some clear images of the entire drive line would help.