Unable to mount rear sprocket

[molash]

Hello all,
My friend and i want to build a motorized bike, this will be our first build. We got a nice bike to mount the motor to ,however we are unsure if the rear sprocket can be mounted along side the rear disc brake as there seems to be very little clearance, keep in mind that the motor has not arrived yet we are just speculating at this point. I will attach photos. We have considered other drivetrain options like either having output on the right side of the bike then connecting the output chain to the crankset directly or getting rid of the disk brake and somehow mounting the sprocket in its place and then just using regular brakes. Please advise.
The bike is a giant roam
Thanks

 

[Wrench]

Can someone please explain where there is room for a sprocket on this wheel that will work. Must be 700c wheels.

She no go , unless ya cut off that caliper mount. and relocate the caliper with a bracket kit,

But there is always a Scroter (sprocket & rotor) the rotor is a sprocket too
Used on custom M/C builds. but I would have no Idea where to find a Scroter for bicycle brakes & M/B. it don't exist

 

[Chainlube]

Can someone please explain where there is room for a sprocket on this wheel that will work. Must be 700c wheels.

The frame has to be stretched the same amount as the spacer that goes between the sprocket and disc. If the frame is aluminum, forget it, it's not going to stretch.

 

[graggy]

If those are quick release levers on those wheels get rid of them and use real nuts with lock washers on them...Quick release wheels will never last on motorised bikes and is a major accident looking for a place to happen.

If that is a steel frame bicycle, NOT ALUMINUM, you will be able to stretch the rear portion of the frame to accomodate the rear wheel along with sprocket and disk brake rotor the same way that I did on my bike.

If it is aluminum, DON'T try to stretch it, the frame will crack and break on you.

Aluminum frame bikes are NOT recommended for motorised bicycle builds as they are not as forgiving as steel frame bikes...Aluminum WILL stress crack and break as they do not take kindly to the vibrations and speeds of motorised bicycles.

My bike was not disk brake ready with its own brackets welded on the frame like yours...I had to make my own adapters to put disk brakes on mine.

Here are the instructions below along with pics of my bike showing it can be done.

I don't recommend this method on an aluminum frame because it would probably crack and break, but this is what i did on my Steel Frame Hyper Beach Cruiser to accomodate the rear sprocket and disk to fit within the dropouts and frame.

On my bike, (steel frame ONLY), i had to "stretch" the rear forks apart by hand, about 1/2 an inch to put the rear wheel with sprocket/rotor attached, and then use a spare 15MM axle nut on the sprocket/rotor inside of the drop down, threaded to the axle with blue locktite, to maintain that amount of "stretch" to accommodate the amount of of clearance space the rotor needs so as not to be pressed against the frame.

It helps to have a buddy with a strong pair of hands to help in this proceedure like I did...lol.

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Hi I just saw this post about quick release wheels. I am building my first bike and it has quick release wheels. Can I still use them if I put a lockwasher and a nut on them?

 

[DAMIEN1307]

Hi I just saw this post about quick release wheels. I am building my first bike and it has quick release wheels. Can I still use them if I put a lockwasher and a nut on them?

I pretty much already answered that question already in my previous post on this thread that you just quoted...lol.

If those are quick release levers on those wheels get rid of them and use real nuts with lock washers on them...Quick release wheels will never last on motorised bikes and is a major accident looking for a place to happen.

What part of this wasn't understandable???...lol...My answer even now is not going to be any different.

I wouldn't do that if I were you...They have been known to cause catastrophic accidents and injuries if not worse...NO quick release wheels should EVER be used on motorised bicycles, they are not designed for the speeds, power, or torque our bikes are capable of.

 

[robe]

Here are a couple pictures of the mock up on my new build. Those bolts you see are practice ones, I will put better ones in. My other bike has a similar set up but with a home made bottom strap.

Damien, thanks for the info on the quick release wheels, I have them on mine and didn't give it much consideration. Now you have me worried.
Just go slow and hope for the best. Lol

I've been using Ubuntu and Brave Browser for years.

 

[robe]

As far as the rear sprocket goes. I'd cut the mounting flange back for more clearance, buy the correct one or drill out the sprocket to fit. I have clamped the old disc to the sprocket and used a hinge centring drill to drill the pilot holes, worked out well but I have a drill press. You could do it by hand if you were careful and lucky.
Then you are stuck with a rim brake which isn't ideal.