Question regarding metric to standard adapters

[numscul]

I am building a miniature dragster for my son out of many different parts and pieces from gas powered toys I destroyed in the past and I have run it an issue because I want to put skinny wheels from a bicycle on the front but the spindles I used were from a 1985 Yamaha badger that happened to have 17mm spindles and I can't seem to find any kind of skinny wheel that have 17mm hubs that will fit and I can't seem to find any 17mm to 3/4 adapter anywhere..

Can someone ANYONE! help an old goofball out ?

 

[Master Hack]

We have many old, goofballs, geezers and dummies but enough about me....
not sure what yer after here.
l think you need a wheel/hub to fit a 17mm spindle? But what you have is for 3/4?
is that correct?
pics are helpful if ya can.

 

[ezcome-ezgo]

An adapter 17mm -> 3/4 would have a wall thickness of roughly 3/64". I think.

 

[Master Hack]

An adapter 17mm -> 3/4 would have a wall thickness of roughly 3/64".

There always has to be that smart guy that can do math n stuff!


Might be possible to make up the difference with a bearing change....

 

[Rat]

I used were from a 1985 Yamaha badger that happened to have 17mm spindles and I can't seem to find any kind of skinny wheel that have 17mm hubs that will fit

You won't either, not bicycle hubs anyway because the largest available is 1. Rear and 2. 15mm through axle. The largest through axle front hubs are 12mm iirc, but 10mm for sure.

None of those are going to be available in a bycycle wheel smaller than 26" unless built custom

and I can't seem to find any 17mm to 3/4 adapter anywhere..

And you won't, you would have to make your own shim out of thin wall tube and hope for the best

Can someone ANYONE! help an old goofball out ?

I have a pair of Kart front spindle assemblies that are 3/4" as well as a set of 5" two piece four bolt wheels and matched hubs I'd let go of. They need cleaned up and repainted, but they are solid wheels.

 

[ezcome-ezgo]

There always has to be that smart guy that can do math n stuff!

I have a ruler. It has regular human measurements on one side and that alien euro trash on the other. It's like a deciphering stick.

 

[Master Hack]

Google stick parameter decoder

you can insert a Google-URL containing the stick-parameter. The tool then extracts the stick-value and decodes it.

valentin.app

 

[numscul]

Okay so I've been doing some looking and I found bearings that fit but I can't seem to find spoke rims with a 17mm bore and are between 10" to 12 inches in size..

Does anyone know if they make bicycle rims with removable bearings ? all the ones I'm finding are all for 12mm axles and I need wheels that will fit a 17mm shaft

This build just won't look right with big'ol tires in the front
Here is what I have done so far
You guys can see why I think it needs thin front tires for it

 

[numscul]

You won't either, not bicycle hubs anyway because the largest available is 1. Rear and 2. 15mm through axle. The largest through axle front hubs are 12mm iirc, but 10mm for sure.

None of those are going to be available in a bycycle wheel smaller than 26" unless built custom

And you won't, you would have to make your own shim out of thin wall tube and hope for the best

I have a pair of Kart front spindle assemblies that are 3/4" as well as a set of 5" two piece four bolt wheels and matched hubs I'd let go of. They need cleaned up and repainted, but they are solid wheels.

View attachment 147807

Thanks for the offer I really appreciate your generosity and willingness to help me but I have already welded the front end together and there ain't no going back now

I Would be willing to trade you for something I have... I have lot's of different parts and pieces for go karts and mini bikes... Let me know if you are interested in seeing the junk I have to see if you want to make a trade and I'll post some pics

 

[numscul]

We have many old, goofballs, geezers and dummies but enough about me....
not sure what yer after here.
l think you need a wheel/hub to fit a 17mm spindle? But what you have is for 3/4?
is that correct?
pics are helpful if ya can.

I have 17mm and was thinking about trying to adapt them to fit 3/4 but now I'm not to sure what I'm going to do the build needs thin tires in the front and I can't seem to find any that will work

I posted a few pics

 

[Master Hack]

I have 17mm and was thinking about trying to adapt them to fit 3/4 but now I'm not to sure what I'm going to do the build needs thin tires in the front and I can't seem to find any that will work

This really ain't that difficult. Do you have a 3/4 hub/wheel set you want to use? A 6203 bearing has a 17 MM bore, so that would fit yer 17MM spindle. If you can find the ID of the hub where the bearing goes, (or the OD of the bearing that fits said hub) then all ya need is a bushing. (maybe)
3/4 inch = .750 inch or 19.05 MM
17 MM = .669 inch
A bushing .040 thick on the spindle or preferably a bushing on the bearing OD. But we need to know what the hub is.
It ain't rocket surgery, Denny can fix this in a few seconds.

OR make a 3/4 spindle outta a 3/4 bolt??

 

[numscul]

This really ain't that difficult. Do you have a 3/4 hub/wheel set you want to use? A 6203 bearing has a 17 MM bore, so that would fit yer 17MM spindle. If you can find the ID of the hub where the bearing goes, (or the OD of the bearing that fits said hub) then all ya need is a bushing. (maybe)
3/4 inch = .750 inch or 19.05 MM
17 MM = .669 inch
A bushing .040 thick on the spindle or preferably a bushing on the bearing OD. But we need to know what the hub is.
It ain't rocket surgery, Denny can fix this in a few seconds.

OR make a 3/4 spindle outta a 3/4 bolt??

Let's completely forget about the 3/4 idea I first had because I now know that they don't make bicycle wheels that will fit a 3/4 or a 17mm wheel

I need to figure out if there is a way to attach a 10" to 12 bicycle wheel to the 17mm front spindles or figure out some kind of alternative without using a normal size rim and tire that would make the thing look even worse than it already does...ha ha !

 

[Master Hack]

Well, l know nuthin 'bout bicycle wheels, so l/we need sumpthin to work with.
Dimensions/pics/drawings/sketches, sumpthin.
send pics of nekkid wimmin by PM only!

 

[Rat]

Let's completely forget about the 3/4 idea I first had because I now know that they don't make bicycle wheels that will fit a 3/4 or a 17mm wheel

There is the possibility of "Adult industrial/cargo trike Hollow hubs" I know that heavier cargo trikes tend to use 451 bead seat diameter tires (20") but the hollow hubs tend to have flanged 5/8 bore bearings. Those very easily knocked out and replaced with whatever size flanged bearing you want (within reason)

I need to figure out if there is a way to attach a 10" to 12 bicycle wheel to the 17mm front spindles

That's only possible if you shell out the cash tl have custom wheels hand built to your specs

or figure out some kind of alternative without using a normal size rim and tire that would make the thing look even worse than it already does...ha ha !

If you keep the current heading, youre going to be into it deep for expensive custom work.

Well, l know nuthin 'bout bicycle wheels, so l/we need sumpthin to work with.

I'm a die hard bicycle modifier.

I build wheels that bicycle shops won't touch with a 50 foot pole


That is a Mountain bike hub laced into a 1970 size 185B-18 steel Takasago rim from the rear of a dirtbike.
That hub ended up being too narrower and leading to a lot of bent 3/8" (9.5mm) axles before I modified a different hub and matched built a matching front version that ironically has never bent a single 10mm axle


F★ck around and find out

 

[Master Hack]

Well, there ya go! Help this guy out!

 

[panchothedog]

Have you given any thought to having your axles turned down to a smaller diameter. One that you can find wheels to fit. Might not be cheap, but it's doable.

 

[Rat]

Have you given any thought to having your axles turned down to a smaller diameter. One that you can find wheels to fit. Might not be cheap, but it's doable.

For what he's trying to do, the only wheels I know of that would work AS IS the way they are made minus a bearing upgrade (what they have is beyond cheap and floppy) would be the wheels from a bicycle trailer... they are generally 12½ like an itty bitty kids bike and are similarly to an adult trike common hollow hub with pressed in flange bearings. I found these without trying too hard, which are similar but larger than the ones on my old Allen Sports bicycle light cargo/utility folding trailer which has the 12½ wheels I mentioned.

I don't know that I would trust tubeless no flat tires and composite wheels on a kart... rated 250lbs or not. That load rating has no bearing on latteral flex or side loading limits before the composite shatters, and they really aren't meant for more than 20mph.

A steel rim with steel spokes, steel hubs, and traditional pneumatic tires should do perfectly fine sans a bearing upgrade to something without 5-10° of runout play

 

[ezcome-ezgo]

This is confusing. What do these hubs you have look like? They accommodate spokes?

 

[numscul]

This is confusing. What do these hubs you have look like? They accommodate spokes?

Right now the only hubs I have that fit are the ones that came off of the Quad that I disassembled to create the front end and they have a 3 bolt hole pattern that can not accept anything but quad tires

I do not want quad tires on the front of this kart because I am building this kart to look like a micro "Top Fuel" dragster

SO right now I have no Hubs that I can use due to the fact I want to complete the look by having thin front wheels just like a Top fuel dragster has ... But I can not find any thin front wheels that will fit onto a 17mm spindle which is what I have and was forced to use because that's what came off of the quad that I took apart and there is no way I can get a rim with spokes to work with hubs meant for fat quad rims

I will take a bunch more pics later to give you all a better idea of what I'm up against

 

[Rat]

there is no way I can get a rim with spokes to work with hubs meant for fat quad rims

There is if you are capable of thinking outside the box, and probably WAY outside of your comfort zone.

I know for a fact I could pull it off, it would only be a matter of finding parts that I could force to work together the way needed.

The thing to look at is the spindles, not the hubs you have that fit them and so you make what you want per THAT parameter.

Then it would just be a question of cost

I will take a bunch more pics later to give you all a better idea of what I'm up against

That should have been done 10 posts ago.

There is such a thing as junior drag kart wheels, afaik they are similar in size to a 16" bicycle wheel