I recently bought a Mongoose Fat Tire Dolomite bike for a rear hub conversion. Im having a problem finding a rear hub motor that has long enough axles. The rear dropouts on the Dolomite are 190mm. Ive heard from some on here that you can push the frame in a bit to make it fit a 170mm axle. Thats about a decrease on an inch. The frame is steel. Have any of you guys made a conversion like this? A couple of mm does not bother me but about 25mm is a little more extreme. Im assuming the nylon lock nuts and washers would hold the frame in but Im a little worried about stress fractures, etc. Id really like to hear from someone who has done this and what their experience is with it over the long term. Im looking for a 72v 3kW rear hub. Some suggestions that Ive gotten on here are a MXUS 5000W direct drive motor. A Magic Pie Vector, (195mm axle), and a 12t MAC geared hub motor (170mm axle). I also found this on amazon about a mongoose Malus which is similar size to the mongoose dolomite.
What is the wheel dropout width,is it 170mm? Will it fit a fat bike electric conversion kit?
Answer: Rear wheel drop out is 185mm. The bottom bracket is 110mm and I've converted this to an ebike using a BBSHD 120mm kit from luna cycle. It becomes a very sweet ebike on which I've done over 400 miles in a few weeks.
By Amazon Customer on November 5, 2016
This bike will work with 170mm axle 'Fat Bike' rear hub motors. I have 2 of these, one with a Magic Pie Vector, (195mm axle) and the other with a 12t MAC geared hub motor (170mm axle). The forks will pull in a little but that is ok. Rear break caliper only needed a 5mm washer on the rear most bolt to properly realign after being pulled in for the 170mm motor axle. The frame triangle also easily fits a 'Large Triangle Battery' (14s9p) from EM3EV. see less
By Donald M. on September 2, 2017
What is the wheel dropout width,is it 170mm? Will it fit a fat bike electric conversion kit?
Answer: Rear wheel drop out is 185mm. The bottom bracket is 110mm and I've converted this to an ebike using a BBSHD 120mm kit from luna cycle. It becomes a very sweet ebike on which I've done over 400 miles in a few weeks.
By Amazon Customer on November 5, 2016
This bike will work with 170mm axle 'Fat Bike' rear hub motors. I have 2 of these, one with a Magic Pie Vector, (195mm axle) and the other with a 12t MAC geared hub motor (170mm axle). The forks will pull in a little but that is ok. Rear break caliper only needed a 5mm washer on the rear most bolt to properly realign after being pulled in for the 170mm motor axle. The frame triangle also easily fits a 'Large Triangle Battery' (14s9p) from EM3EV. see less
By Donald M. on September 2, 2017