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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Twin rear wheel sprockets...
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Author Topic: Twin rear wheel sprockets...  (Read 1561 times)

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FuNMoNsTeR

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Twin rear wheel sprockets...
« on: January 15, 2008, 08:26 PM »
I need to build a rear wheel with 2 sprockets.... Will this work if i use a flip flop hub?


Offline kdw712

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Re: Twin rear wheel sprockets...
« Reply #2 on: January 15, 2008, 08:42 PM »
i thought flip flop allowed smaller drives on one to the other

so you have 16t and 15t - not good

sure DK did a hub for this - like the old clem twin drive
cheers Kev
{ wanted : "Red Haro Handle" brake lever link to my trade post }

Offline kdw712

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Re: Twin rear wheel sprockets...
« Reply #3 on: January 15, 2008, 08:43 PM »
cheers Kev
{ wanted : "Red Haro Handle" brake lever link to my trade post }

Offline poolysheriff

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FuNMoNsTeR

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Re: Twin rear wheel sprockets...
« Reply #5 on: January 15, 2008, 09:03 PM »
Thanks guys.... but that sprocket wont work  :(

My mad mate Warren saw my pics of the Clemtwin system and insists he wants to build a Clemtwin esc setup. Possibly to go on his Crazy Goose. Crank arms are not a problem.
  I just figured the problem with a flip flop hub.... As you pedal it would undo one of the sprockets so some rethreading would be in order??
 

FuNMoNsTeR

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Re: Twin rear wheel sprockets...
« Reply #6 on: January 15, 2008, 09:05 PM »
think this is it

http://www.danscomp.com/426019.php?cat=PARTS

Cheers m8....That would work.... 14mm axle though  :(

HEYWOOD BMX

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Re: Twin rear wheel sprockets...
« Reply #7 on: January 15, 2008, 09:09 PM »
 :) Haro used to do  a LSD/RHD flip flop 14mm hub.I had one,got it from Shitestanleys.....

Offline MartyC

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Re: Twin rear wheel sprockets...
« Reply #8 on: January 15, 2008, 09:24 PM »
think this is it

http://www.danscomp.com/426019.php?cat=PARTS

Cheers m8....That would work.... 14mm axle though  :(

Just a thought but it has sealed bearings so you could see if you could get bearings with a smaller inside diameter to replace the stock ones or get shims made up to reduce the axle down to 3/8" or 10mm and put a different axle in  :daumenhoch:


Better to crash and burn than fade away

FuNMoNsTeR

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Re: Twin rear wheel sprockets...
« Reply #9 on: January 15, 2008, 09:30 PM »
think this is it

http://www.danscomp.com/426019.php?cat=PARTS

Cheers m8....That would work.... 14mm axle though  :(

Just a thought but it has sealed bearings so you could see if you could get bearings with a smaller inside diameter to replace the stock ones or get shims made up to reduce the axle down to 3/8" or 10mm and put a different axle in  :daumenhoch:

I wondered that too..... thanks m8.  :daumenhoch:

Offline TwoBobRob

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Re: Twin rear wheel sprockets...
« Reply #10 on: January 15, 2008, 09:43 PM »
I feel really stupid now.

I always thought that a flip flop hub was built so you just screw on two different sized ordinary freewheels.  Then, at the racetrack if you need to change your gearing quickly, all you do is whip your back wheel out and turn it around.   ???


FuNMoNsTeR

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Re: Twin rear wheel sprockets...
« Reply #11 on: January 15, 2008, 10:03 PM »
I feel really stupid now.

I always thought that a flip flop hub was built so you just screw on two different sized ordinary freewheels.  Then, at the racetrack if you need to change your gearing quickly, all you do is whip your back wheel out and turn it around.   ???



Me too  :LolLolLolLol:

Offline MartyC

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Re: Twin rear wheel sprockets...
« Reply #12 on: January 15, 2008, 10:07 PM »
I feel really stupid now.

I always thought that a flip flop hub was built so you just screw on two different sized ordinary freewheels.  Then, at the racetrack if you need to change your gearing quickly, all you do is whip your back wheel out and turn it around.   ???



Me too  :LolLolLolLol:

You mean its not?  The l/h side is a regular freewheel but smaller not a l/h drive so you do just that, whip it out and switch it over  :-\


Better to crash and burn than fade away

FuNMoNsTeR

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Re: Twin rear wheel sprockets...
« Reply #13 on: January 15, 2008, 10:11 PM »
I feel really stupid now.

I always thought that a flip flop hub was built so you just screw on two different sized ordinary freewheels.  Then, at the racetrack if you need to change your gearing quickly, all you do is whip your back wheel out and turn it around.   ???



Me too  :LolLolLolLol:

You mean its not?  The l/h side is a regular freewheel but smaller not a l/h drive so you do just that, whip it out and switch it over  :-\

Thanks for clearing that up m8 :)

See Rob...we are not stupid after all  :D  :crazy2:

Just victims of substance abuse  ;D
« Last Edit: January 15, 2008, 10:16 PM by FuNMoNsTeR »

Offline TwoBobRob

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Re: Twin rear wheel sprockets...
« Reply #14 on: January 15, 2008, 10:15 PM »
Woohoo!!!!  I knew it!!!

I knew the teachers were wrong..........   :-[ :-[ :-[


Offline kdw712

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Re: Twin rear wheel sprockets...
« Reply #15 on: January 15, 2008, 11:31 PM »
if you cant easily change the axle in the DK you could always machine / file some flats on its only a couple of mm each side

then all  you need is two drive sides for the crank and your there

not that i've thought about this much  :coolsmiley:


crap pic but you can just make it out

cheers Kev
{ wanted : "Red Haro Handle" brake lever link to my trade post }

Offline MartyC

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Re: Twin rear wheel sprockets...
« Reply #16 on: January 15, 2008, 11:52 PM »
if you cant easily change the axle in the DK you could always machine / file some flats on its only a couple of mm each side

then all  you need is two drive sides for the crank and your there

Great idea, didn't think about doing that at all - it would totally work  :daumenhoch:


Better to crash and burn than fade away

Frosty

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Re: Twin rear wheel sprockets...
« Reply #17 on: January 15, 2008, 11:55 PM »
here's some more pics I had snaffled from bmxm a while ago






FuNMoNsTeR

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Re: Twin rear wheel sprockets...
« Reply #18 on: January 16, 2008, 12:05 AM »
if you cant easily change the axle in the DK you could always machine / file some flats on its only a couple of mm each side

then all  you need is two drive sides for the crank and your there

not that i've thought about this much  :coolsmiley:


crap pic but you can just make it out



N1 m8....that would work a treat... I have the arms sorted already  ;)

I missed a set of Profile twin drive cranks on US eBay last summer...they went for less than $300 and i was skint ::)

Offline kdw712

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Re: Twin rear wheel sprockets...
« Reply #19 on: January 16, 2008, 12:13 AM »
i don't know if they gave any real benefit at all

but it sure looks a sweet set up with dual drive  :daumenhoch:  :)
cheers Kev
{ wanted : "Red Haro Handle" brake lever link to my trade post }

Frosty

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Re: Twin rear wheel sprockets...
« Reply #20 on: January 16, 2008, 12:19 AM »
Yeh Kev, looks sweet but I bet it was an arse to set up. I can't imagine that the wear would have been even on each side either

Offline kdw712

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Re: Twin rear wheel sprockets...
« Reply #21 on: January 16, 2008, 12:22 AM »
 :LolLolLolLol:

you'll slowly start going in circles  :shocked: 
cheers Kev
{ wanted : "Red Haro Handle" brake lever link to my trade post }

Offline kdw712

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cheers Kev
{ wanted : "Red Haro Handle" brake lever link to my trade post }

Offline billstup

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Re: Twin rear wheel sprockets...
« Reply #23 on: January 16, 2008, 05:25 PM »
Thanks guys.... but that sprocket wont work  :(

My mad mate Warren saw my pics of the Clemtwin system and insists he wants to build a Clemtwin esc setup. Possibly to go on his Crazy Goose. Crank arms are not a problem.
  I just figured the problem with a flip flop hub.... As you pedal it would undo one of the sprockets so some rethreading would be in order??
 

The left hand one wouldn`t undo, it would just freewheel like if you were pedaling backwards on a normal freewheel, it would need a left hand drive freewheel and the thread would need changing on the wheel/hub to LHD too (obviously only on the left hand side of the wheel/hub)  :daumenhoch:
I see you stand like greyhounds in the slips,
 Straining upon the start. The game's afoot:
 Follow your spirit, and upon this charge
 Cry 'God for Harry, England, and Saint George!'

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Twin rear wheel sprockets...
 

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