tsujinago
New Member
I'm building a rack mounted bike for my second build, heavily inspired by this lifan rack mount build. I've already mounted the top section to the seat post all fine and aligned, so that's not a problem - neither is acquiring tools, as I'm using my school's auto shop to do this one. However, upon taking off the rear wheel for inspection, I came across a problem - I don't exactly know how I can mount the supporting beams onto the rear axle.
Here is my rear wheel, a standard mountain bike quick release wheel. I've marked the two potential mounting points with red and blue here.
The red part is the part of the wheel held in only by the skewer. It would be easy to mount the beams here, but I'm not exactly sure the thin mountain-bike skewers are up to the job of holding up a 25 pound engine and rack. Sure, they may not have a problem holding my 135 pounds up, but I don't know if mounting there would be smart.
The blue part, on the other hand, is a heavier part of the axle made out of 10mm threaded bit covered by a nut. What I could do there is just use a couple of washers on the inside of the right side to take up space and mount a support beam there and then just take the nut off on the left side and use a couple washers there to mount the left support beam(s) - provided the nuts come off. This would be the more complicated option and I'd worry a bit about the support beams being in the way of both chains, left and right.
What should I do? Red or blue? Will a simple quick-release skewer hold 25 pounds of engine (I mean, it already supports my weight) or will I have to do something a bit more complex? If there is no decisive answer, I guess I'll choose red for simplicity, but I just need to make sure of the strength of that small rod.
Here is my rear wheel, a standard mountain bike quick release wheel. I've marked the two potential mounting points with red and blue here.
The red part is the part of the wheel held in only by the skewer. It would be easy to mount the beams here, but I'm not exactly sure the thin mountain-bike skewers are up to the job of holding up a 25 pound engine and rack. Sure, they may not have a problem holding my 135 pounds up, but I don't know if mounting there would be smart.
The blue part, on the other hand, is a heavier part of the axle made out of 10mm threaded bit covered by a nut. What I could do there is just use a couple of washers on the inside of the right side to take up space and mount a support beam there and then just take the nut off on the left side and use a couple washers there to mount the left support beam(s) - provided the nuts come off. This would be the more complicated option and I'd worry a bit about the support beams being in the way of both chains, left and right.
What should I do? Red or blue? Will a simple quick-release skewer hold 25 pounds of engine (I mean, it already supports my weight) or will I have to do something a bit more complex? If there is no decisive answer, I guess I'll choose red for simplicity, but I just need to make sure of the strength of that small rod.
