Originally Posted by
LuMax
To take the guesswork out of it I just weighed everything and checked my cog and chainring.
I'm currently running a 44t with a 20t cog with the nexus 3-Speed.
I'm guessing the cranks are 172.5-175mm.
My bike weighs 55 pounds as pictured (no dogs) and has 20" wheels.
The diameter of the fat tires is nearly 26" (25 3/4").
The trailer + empty cooler weight is 33 1/2 pounds.
One big problem is I just measured the rear dropouts, they are only 120mm. I thought they were 135mm with spacers but they are not. So I am limited to the 3-speed hub
AFAIK. So now the only option is to change the front ring or the rear cog. I can only gain up to a 23t in the back, so swapping out the front ring is probably the best choice. Probably don't need to drop down to a 32t though, maybe more like a 36t.
Is the bike aluminium or steel? If alu leave it as it is. If steel you can re space the rear. I tend to do it the rough way, just put a slim car jack in there and respace that way. Remember it is going to stretc a bit so make it a bit wider than you need, it will "travel back" some mm`s when you remowe the tension. Read up on respacing and how to check that your frame is straight (string method) before you start. Sheldon Brown wrote about it but also others. Keep us updated!