Widen mobility scooter axle

[RZ1]

I need to try to widen the axle of a mobility scooter which is being used to make the kids a ride on car.

I’m struggling with coming up with a way to widen the rear axle by an inch either side.

Wider tyres won’t help as I won’t be able to get the nut back on to secure the new tyres, any ideas how I can do this?

[Catnip64]

It appears to have a hub, so why not fit spacers between that and the wheel?

[J4CKO]

Internally threaded bar of the same diameter, attach to the existing thread, then add a piece of threaded bar into the other end to replicate what the wheel is fixed to,and I would run a bead of weld around having first chamfered a little off the edges, then weld into the gap created.

https://www.ebay.co.uk/itm/111834853061?itmmeta=01...

[RZ1]

J4CKO said:

Internally threaded bar of the same diameter, attach to the existing thread, then add a piece of threaded bar into the other end to replicate what the wheel is fixed to,and I would run a bead of weld around having first chamfered a little off the edges, then weld into the gap created.

https://www.ebay.co.uk/itm/111834853061?itmmeta=01...

The only issue with this is that the current wheel has a slight notch cut out, almost like a key which ensure the axle spins the wheel.

Would have to see if I can replicate the notch onto the new piece

[J4CKO]

RZ1 said:

J4CKO said:

Internally threaded bar of the same diameter, attach to the existing thread, then add a piece of threaded bar into the other end to replicate what the wheel is fixed to,and I would run a bead of weld around having first chamfered a little off the edges, then weld into the gap created.

https://www.ebay.co.uk/itm/111834853061?itmmeta=01...

The only issue with this is that the current wheel has a slight notch cut out, almost like a key which ensure the axle spins the wheel.

Would have to see if I can replicate the notch onto the new piece

That did occur to me, should be possible with a bit of hacksaw/file action, assume you dont have a milling machine....

Would definitely need welding in that case though, good little project.

[paintman]

Careful use of an angle grinder would probably do for cutting the groove.

[Bill]

Catnip64 said:

It appears to have a hub, so why not fit spacers between that and the wheel?

This seems easiest. And does turning the wheel round help as well?

[RZ1]

Bill said:

Catnip64 said:

It appears to have a hub, so why not fit spacers between that and the wheel?

This seems easiest. And does turning the wheel round help as well?

Wheel spacers won’t work as I can’t get the nut back on to secure the wheel.

Turning the wheel makes the width even narrower

[Bill]

Can you undo the 4 nuts and removed the hub from the wheel and put a spacer there?

[dhutch]

RZ1 said:

Wheel spacers won’t work as I can’t get the nut back on to secure the wheel.

Turning the wheel makes the width even narrower

If I'm reading this correctly, the wheel bolts to a hub, which fits onto the shaft, but then the bolt which secures that sub-assy to the axle bears down on the face of the wheel, not the face of the hub?

[RZ1]

Bill said:

Can you undo the 4 nuts and removed the hub from the wheel and put a spacer there?

The problem with that is i won't be able to get this nut back on to secure the wheel onto the axle

[dhutch]

RZ1 said:

The problem with that is i won't be able to get this nut back on to secure the wheel onto the axle

Is that nit against the aluminum wheel then, it almost looks like that's the steel hub poking through the 'spokes' but hard you see from the image.

[RZ1]

Hopefully this helps







I also need to devise some kind of puller tool as I can’t get the central part of the wheel off the axle, its a 3 part split wheel, almost the same as my old BBS alloys from about 20 years ago

Edited by RZ1 on Tuesday 16th April 16:52

[Bill]

I'd call that a 2 part split wheel and a hub. Bolt the hub to the shaft then use a spacer between the hub and wheel. Then find a suitable (or not) centre cap to cover the hole.

[RZ1]

Bill said:

I'd call that a 2 part split wheel and a hub. Bolt the hub to the shaft then use a spacer between the hub and wheel. Then find a suitable (or not) centre cap to cover the hole.

Looks like this could work, have managed to increase the width by 3/4 inch on one side, might need to see if I can find some slighter wider wheels as the ones I’ve got a 3 inch wide.
Currently stretched them to 3 and 3/4 inch as I’ve used the spacer inside the tyre

Edited by RZ1 on Tuesday 16th April 18:02

[Bobupndown]

You need migweldingforum

https://www.mig-welding.co.uk/forum/

[CambsBill]

Sounds like you need Carlos Fandango Super Wheels

https://www.youtube.com/watch?v=nqqZ28m8uCo

[Super Sonic]

paintman said:

Careful use of an angle grinder would probably do for cutting the groove.

Rofl

[dhutch]

Super Sonic said:

paintman said:

Careful use of an angle grinder would probably do for cutting the groove.

Rofl

You can definitely put the key ways in with a grinder! But only on shafts, not hubs! Also it suitable for high speed applications. ;)

[dhutch]

RZ1 said:

Bill said:

Bolt the hub to the shaft then use a spacer between the hub and wheel.

Looks like this could work....

Yarp!