Doublewide front KMX rims

Did you ever thought about having better front wheel in front of your KMX when you need better handling during cornering

I searched for these 12" rims ( for 16" tire) alot and the one that are made for 32 holes seem to only exist from KMX !!.. ther est are all kids bicycle rims made for 20 or 28 holes..

So i decided to create my own 8)

I bought another set of front 12" 32 holes KMX rims and glued them together with DP420 epoxy

That's amazingly STRONG !! rim now !!

and also are now 2" wide :wink:
The original Big apple tire is also 2.3" wide :wink:

Problem was about the tube.. you know that the dual rim middle junction is like an obstacle for the tube...

So i decided to use two tubes side by side !!

This solve the problem and also have one big advantage!.. even if one tire is flat, the other tire will take the room and have half pressure wich is enough to get back to home without damage to the wheel

The tire is now really tight and solid to the rim... it will no more have deformation on the side during cornering, The trike will handle better!

These modifieds rims really look like the chopper rims!

the look of the KMX will be much better!

Hmm, that would give you a lot more contact patch, yup!

What do you think about turning it into a duallie... two 1.25" or 1.5" tires side by side?

neptronix said:

What do you think about turning it into a duallie... two 1.25" or 1.5" tires side by side?

Click to expand...

Yeah i thought about that but i think that it will be nearly the same as using a single normal wheel. small tire on large rim make the tire side wall to become really tough and will not be rolling on the side of the rim due to lateral traction need.

it is nearly impossible to move that tire side by side on my wider rim... but it was easy on the single rim wheel !

Doc

Whats the tire scrub like in the corners? does it change the Ackerman geometry much?

Hi Stephane,

Outstanding work again... (the dual air chamber you created there will be great since they will push on each other during cornering and give good handling)

Have you seen those rim yet (12,5'' X 2,25'' - 2,5'' - 2,75'')... they are used for electric moped.
http://www.electricscooterparts.com/images5/WHL-400F.jpg found on this website http://www.electricscooterparts.com

Also
http://buckscountychoppers.com/inde...ducts_id=158&zenid=r81co35auh5rgijdmp8v527kd1
http://www.scooterpart.net/products.php?id=1051
(if the weight would not matter those would be awesome looking)
http://www.ebay.com/itm/CNC-Aluminu...-bike-wheels-2-5-2-75-3-X-10-12-/261057193894

You could check near your home town at Adrenaline Sport for kids motorcross 12'' rims
http://www.adrenalinepowersportsllc.com

Kirk said:

Whats the tire scrub like in the corners? does it change the Ackerman geometry much?

Click to expand...

Still not tried yet... but the tire is still centered as it was.. just about 0.5" wider from the middle of the tire on each side.

Doc

Bison_69 said:

Hi Stephane,

Outstanding work again... (the dual air chamber you created there will be great since they will push on each other during cornering and give good handling)

Have you seen those rim yet (12,5'' X 2,25'' - 2,5'' - 2,75'')... they are used for electric moped.
http://www.electricscooterparts.com/images5/WHL-400F.jpg found on this website http://www.electricscooterparts.com

Also
http://buckscountychoppers.com/inde...ducts_id=158&zenid=r81co35auh5rgijdmp8v527kd1
http://www.scooterpart.net/products.php?id=1051
(if the weight would not matter those would be awesome looking)
http://www.ebay.com/itm/CNC-Aluminu...-bike-wheels-2-5-2-75-3-X-10-12-/261057193894

You could check near your home town at Adrenaline Sport for kids motorcross 12'' rims
http://www.adrenalinepowersportsllc.com

Click to expand...

Hi sylvain, Yes these are great idea but problem remain that they are not 32 holes rims :lol: .. that's why it is difficult to get... and drilling additional holes would not be really symetric with the different non multiple holes.

Doc

Good idea and looks great! I'm concerned that the epoxy will degrade over time and shear at an inopportune moment. I have not used that epoxy though, maybe it will not have an issue. If you add a few small machine screws or some other mechanical fastener through the joined sidewalls of the rims that should alleviate this concern. Yes, it will be a PITA to drill the holes.

-Warren.

www.recumbents.com said:

Good idea and looks great! I'm concerned that the epoxy will degrade over time and shear at an inopportune moment. I have not used that epoxy though, maybe it will not have an issue. If you add a few small machine screws or some other mechanical fastener through the joined sidewalls of the rims that should alleviate this concern. Yes, it will be a PITA to drill the holes.

-Warren.

Click to expand...

Oh.. no worrie about that epoxy. First, it is not really affected by climate.. only high temp wich is not the case. Thsi epoxy is not the cheap epoxy you get in the home depot.. it's aerospace grade epoxy :wink:

You just can'ty imagine how strong and tough it is!

The add of little machine screw would just have a decorative effect compare on how that epoxy is!

I asked myself: Sould i need to take them appart one day?... and after reflection and being 100% that i will not... then i applied teh epoxy on these rims :wink:

Even if they crusk due to accident, they will stay together i have zero doub :wink:

Doc

Mark Twain said, “To a man with a hammer, everything looks like a nail.”

Evidently to a man with a favorite epoxy, nothing ever needs to be welded or mechanically fastened. That is a lot of faith to place in glue.

In this case, it would be a good idea to lace across to the other side of the rim pair, so at least the spoke tension would pull the rims together instead of pulling them apart. That would also add bracing angle to the spokes, to better resist the side loads that trikes apply to their wheels.

The earliest versions of Snow Cat rims from Alaska were a pair of cruiser rims welded side by side, with the center sidewalls cut and ground away.

These days, you can get a 3" wide 20" rim for about the same cost as a normal doublewalled BMX rim:

http://www.choppersus.com/store/product/1050/Rim-Only-20-x-3-Silver/

Chalo

Doc I was reading about this epoxy a while ago and going thru the tests they did on the pdf provided by 3M.

In the case of shear this thing is unbeatable in every scenario.

However I remember the peel test at lower temperatures had a reduction in strength that was significant.

This is just worth looking into since I think when hard cornering you will have shear and peeling forces thru those 2 rims.

Just my 2 cents.

Chalo said:

In this case, it would be a good idea to lace across to the other side of the rim pair, so at least the spoke tension would pull the rims together instead of pulling them apart. That would also add bracing angle to the spokes, to better resist the side loads that trikes apply to their wheels.

Click to expand...

+1 couldnt believe when i saw the laced wheel Doc hadnt done this ...joining two rims together is fairly common in the custom bicycl scene, check the Ratrod bike forums for examples... Damned if i would trust glue and wheels laced like this on a e-trike capable of speed like Docs..

Best of lucvk

KiM

AussieJester said:

Chalo said:

In this case, it would be a good idea to lace across to the other side of the rim pair, so at least the spoke tension would pull the rims together instead of pulling them apart. That would also add bracing angle to the spokes, to better resist the side loads that trikes apply to their wheels.

Click to expand...

+1 couldnt believe when i saw the laced wheel Doc hadnt done this ...joining two rims together is fairly common in the custom bicycl scene, check the Ratrod bike forums for examples... Damned if i would trust glue and wheels laced like this on a e-trike capable of speed like Docs..

Best of lucvk

KiM

Click to expand...

Yeah.. that's again to give you all another proof of how confident i am about that glue :wink:

Doc

just one word:

AMAZING !!!!

Wow.. now that KMX really handle the road perfectly !!!


I tested it tonight between at various speed 0 and 70km/h,

Rim strengh:
-Hard put holes test: PASS
-High speed: PASS
-Cold 5 celsius temp: PASS
-Agressive cornering: PASS
-Added Confort : PASS
-Smoothness : PASS

-Tried to force and break both rims appart: FAIL

Well i'm really impressed by the difference. I never imaginated that it would ameliorate so much!!!

Plus the front wheel look terrific with large low profile tire!

Doc

Amazing Doc! That much glued surface area should hold forever.

Got any pics of the wheels on the bike?

Drunkskunk said:

Amazing Doc! That much glued surface area should hold forever.

Got any pics of the wheels on the bike?

Click to expand...

+1 we want pics with the bike